Compare the Top PDF Annotators as of April 2025

What are PDF Annotators?

PDF annotation tools are pieces of software designed to allow users to add notes and highlight text on PDF documents. They can be used by students or professionals to mark up documents, make comments, and organize information in an intuitive way. Annotations may also include drawing shapes or adding images. The annotations can then be saved with the document for easy sharing and future reference. Compare and read user reviews of the best PDF Annotators currently available using the table below. This list is updated regularly.

  • 1
    Apryse PDF SDK
    Apryse, previously known as PDFTron, takes document solutions to the next level, making work better and life simpler. Bring PDF viewing, annotating, editing, creation, and generation to any web, mobile, desktop or server framework or application. As a global leader in document processing technology, Apryse gives developers, enterprise customers and small businesses the tools they need to reach their document goals faster and easier. Our product portfolio includes Apryse SDK, Fluent, iText and XODO. Apryse technology works with all major platforms and a wide variety of unique file types.
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  • 2
    Nutrient SDK
    Nutrient is the comprehensive solution for all your PDF needs, offering tools that effortlessly integrate and operate PDF functionality across any platform. 1. SDK PRODUCTS Integrate robust PDF functionality into iOS, Android, Windows, web (JavaScript), or any cross-platform technology, providing capabilities such as PDF viewing, markup, collaboration, and more. 2. LIBRARIES Utilize our potent .NET and Java libraries to boost your backend applications with batch processing of redactions and PDF forms, OCR’d scanned text, and editing of PDF documents, directly from your application server. 3. PROCESSOR Our dynamic PDF microservice, Processor, enables swift generation of PDFs from HTML, including HTML forms, along with Office-to-PDF conversions, OCR, redaction, and XFDF merging and exporting. 4. PDF API Use hosted PDF API to generate, convert, and modify PDF documents in your workflows. We manage the development and server administration, letting you focus on what you do best.
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  • 3
    Adobe PDF Library SDK

    Adobe PDF Library SDK

    Datalogics Inc.

    Shorten development times & get to market faster with Adobe PDF Library. Global OEMs, SaaS and enterprise end-users rely on Adobe PDF Library to automate the creation, editing and management of PDFs. An Adobe partner, our SDK uses the same source code as Acrobat for stability, reliability and quality results. Adobe PDF Library gives developers flexible programming language and platform options, and is currently available in .NET, .NET Framework, Java and C/C++ on Windows, Linux, MacOS, as well as via NuGet and Maven. Our extensive documentation includes getting started guides, API references, and hundreds of sample code examples on GitHub to help developers precisely create and define PDF workflow solutions. Pricing for Adobe PDF Library is based on your business model & software usage. Free trial includes access to our PDF technology experts who can help with proof of concept as well as extend your free trial license if needed. Download and get started today!
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  • 4
    MobiPDF (formerly PDF Extra)
    MobiPDF (formerly PDF Extra) is an intuitive and powerful PDF editor and reader designed for today’s modern user - the cost-efficient alternative to Adobe Acrobat Pro you’ve been looking for. FEATURES OVERVIEW: PDF Viewer and Reader: Switch between page views or use "Read Mode" for distraction-free reading. Create and Edit PDFs: Modify text and images or start with a blank PDF. Convert to Office Formats: Easily turn PDFs into Word, Excel, PowerPoint, and image files. Leverage OCR: Transform scanned documents into searchable PDFs. Organize PDFs: Combine, split, reorder, and compress documents. Markup and Comment: Highlight, annotate, and add bookmarks or stamps. Fill PDFs: Seamlessly fill forms or create ones from scratch. Sign PDFs: Sign your documents anywhere—no ink required! Secure Your Work: Protect files with passwords, digital signatures, and 256-bit encryption. Offline Mode: Full functionality without internet access. Translate PDFs
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    Starting Price: $49.99
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  • 5
    SwifDoo PDF

    SwifDoo PDF

    SwifDoo Software

    SwifDoo PDF is a comprehensive, all-in-one PDF tool that offers features that most users often require. This free software comes with a user-friendly interface where most of its main features layout and can be easily recognized and accessed on the main screen of the program. SwifDoo PDF - the most functional PDF editor that can be successfully used by novice users and experienced professionals. Beginners will enjoy the simplicity and certain intuitiveness of the interface, as well as the ability to edit PDF files without much effort. SwifDoo PDF has a number of special features for scanning copy convert. Besides many convert features. PDF Reader PDF Annotation (Including Stamp) Picture/image Extraction (only need copy and paste from PDF) PDF Edit PDF Compress PDF Merge PDF Split PDF Signature System Requirements: Windows 10/7/8/vista/XP Edition: SwifDoo PDF 2.0.0.6
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    Starting Price: $0
  • 6
    RAD PDF

    RAD PDF

    Red Software

    Add a fully functional PDF editor to your ASP.NET website in minutes! Compatible with 99% of desktop & mobile browsers, from Internet Explorer 6 through the latest iOS Safari release, RAD PDF simply works. No plugins or other software needed. RAD PDF natively supports the most commonly used PDF features. Beyond a PDF reader, RAD PDF equips web applications with a browser-based PDF editor & PDF annotator. Features not even available in Adobe Acrobat Reader can be used to provide advanced PDF functionality. By enabling PDF form filling, PDF redaction, & PDF signing directly in the web browser, RAD PDF users can utilize PDF features without worrying about having the right platform or software installed! Allow your app to design new PDF forms, protect content, sign PDFs, & more using an intuitive graphical user interface (GUI). Client (JavaScript) and server APIs allow for endless possibilities .NET Core, Framework, & .NET 5+ supported Try editing any PDF with RAD PDF, FREE!
    Starting Price: $299 per developer
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  • 7
    PDF Studio
    PDF Studio is a powerful and affordable PDF editor that effortlessly caters to both simple and complex PDF tasks. From adding text, various annotations, watermarks, and digital signatures to filling out forms and converting MS Office to PDF, it covers all your needs. The PDF editor is perfect for companies and organizations looking to seamlessly automate their PDF editing and eliminate repetitive daily tasks with batch processing of multiple documents. Empower your team with perpetual PDF software at a fraction of the cost compared to competing subscription-based solutions like Adobe® Acrobat®. NEW: Qoppa PDF Studio 2023 released! The latest version, PDF Studio 2023, offers impressive enhancements, including support for Dropbox Team Spaces, improved enterprise deployments, expanded multi-document functions, a new highlighter marker tool, and optimization options for smaller document sizes. Available on Linux, Windows, macOS, and other major platforms.
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    Starting Price: $99.00
  • 8
    DocMadeEasy

    DocMadeEasy

    iDeskCentric

    From NDAs to loans, from sales contracts to offer letters, Our eSignature tool DocMadeEasy helps companies of all sizes streamline and digitally sign their most critical documents. Unlimited electronic signatures are included in every subscription, plus powerful document features such as hosted sign, bulk sign and templates. Our tool is also a powerful PDF editor. You can use it to annotate pages, insert images, create or manage fields, whiteout texts, merge PDFs, and more. You can also use our service to securely share files with real-time control and insights. End-to-end encryption with AES256. Track and analyze how recipients engage with each page of
    Starting Price: $0
  • 9
    PDF Studio Viewer

    PDF Studio Viewer

    Qoppa Software

    PDF Studio Viewer is a cross-platform PDF reader that is reliable and easy to use. PDF Studio Viewer can annotate PDF documents and fill interactive forms. For more editing features, Qoppa Software publishes PDF Studio Standard and Pro editions. Features: -Display PDFs with high fidelity -Annotate & Markup PDFs -Fill & Save Forms -Render Digital Signatures & Layers -Advanced User Interface -Advanced Print & Search Options -Document Storage Integrations -DocuSign© Integration
  • 10
    Foxit PDF Reader

    Foxit PDF Reader

    Foxit Software

    Whether you're a consumer, business, government agency, or educational organization, you need to read, create, sign, and annotate (comment on) PDF documents and fill out PDF forms. Foxit PDF Reader is a small, lightning fast, and feature rich PDF viewer which allows you to create (free PDF creation), open, view, sign, and print any PDF file. Foxit Reader is built upon the industry's fastest and most accurate (high fidelity) PDF rendering engine, providing users with the best PDF viewing and printing experience. Available in English, Dutch, French, German, Italian, Portuguese, Russian, and Spanish. Sign documents in your own handwriting or utilize eSignature and verify the status of digital signatures. Be safe from vulnerabilities by utilizing Trust Manager/Safe Mode, ASLR & DEP, Disable JavaScript, and Security Warning Dialogs. Integrate with leading cloud storage services and popular enterprise CMS.
    Starting Price: $8 per month
  • 11
    Adobe Acrobat Reader
    View, sign, collaborate on, and annotate PDFs with our free Adobe Acrobat Reader. Only with Adobe Acrobat Reader you can view, sign, collect and track feedback, and share PDFs for free. And when you want to do more, subscribe to Acrobat Pro. Then you can edit, export, and send PDFs for signatures. Do more than just open and view PDF files. It’s easy annotate documents and share them to collect and consolidate comments from multiple reviewers in a single shared online PDF. Work on documents anywhere using the Acrobat Reader mobile app. It’s packed with all the tools you need to convert, edit, and sign PDFs. You can use your device camera to capture a document, whiteboard, or receipt and save it as a PDF. Acrobat Reader is connected to Adobe Document Cloud, so you can work with your PDFs anywhere. You can even access and store files in Box, Dropbox, Google Drive, or Microsoft OneDrive.
    Starting Price: $1.95 per month
  • 12
    Drawboard PDF

    Drawboard PDF

    Drawboard

    Drawboard PDF is the most intuitive PDF editing and markup app for Windows, iOS, macOS, android and web. Powerful PDF tools that feel good to use. Drawboard PDF – Get all the essential free. Mark up and edit any PDF with the ease of pen and paper. Drawboard Pro toolset - Upgrade to use advanced tools and Store+Share with your team. MARK UP AND DRAW All the drawing tools you need to mark and collaborate with the feel of pen and paper. INSERT Insert elements into your documents like, text, notes, callouts, signatures, images, audio notes, and more. MEASURE Take accurate measurements of elements on-page with technical measurement tools and calibration. MANAGE Local and Clouds PDFs in one place. Merge, split, reorder and compress COLLABORATE Real-time collaboration on-page in real time with instant syncing CROSS-PLATFORM Work from anywhere on any device, in real-time!
    Starting Price: $5.99 per month
  • 13
    PDF-XChange

    PDF-XChange

    Tracker Software Products

    The smallest, fastest and most feature-rich free PDF viewer/editor on the market. Create, view, edit, annotate, OCR and digitally sign PDF files - and that's just the beginning. Please see below for a breakdown of the main features of PDF-XChange Editor. More than 70% of the features in PDF-XChange Editor do not require a license to use. The remaining features, which are clearly identified, will place a 'trial' watermark on output if they are used without a license. PDF-XChange Editor Plus includes additional functionality for the creation and editing of fillable forms, the creation of customizable dynamic stamps, and an Enhanced OCR plugin.
    Starting Price: $46.50 one-time payment
  • 14
    PDF Reader Pro

    PDF Reader Pro

    PDF Technologies, Inc

    Back to School Bonanza! Enjoy 50% OFF on PDF Reader Pro and Filmage Screen Buy PC Version, Get Mobile Version Free Aug.15. 2024 - Sept.5. 2024 PDF Reader Pro is powered by PDF Technologies®, founded in 2014, which is a leading software provider of affordable, secure Out-of-Box PDF solutions on Windows, Mac, iOS, & Android. SMBs, IT service, and knowledge workers increase their productivity by using PDF Reader Pro to make workflow smarter. As the best alternative to Adobe® PDF solution, PDF Reader Pro is a PDF powerhouse that will fulfill all your document needs. We offer free Trial and education plans, as well as PDF Technologies’ Software Development Kits (ComPDFkit/SDKs) to help developers reduce costs and improve productivity by integrating industry-leading PDF technologies into application workflows. Welcome to try. If you are interested in being our reseller or distributor, you can check our official site->Business->Partnership Program.
    Starting Price: $19.99/one-time/user
  • 15
    UPDF

    UPDF

    Superace Software Technology Co., Ltd.

    UPDF supports editing, annotating, and managing PDF seamlessly on for Windows, Mac, iOS and Android. You can get every tool you need to edit, annotate, and organize your PDF files in one premiere all-rounder smart application. It is explicitly designed to meet the desire of most users for a stunning yet very comprehensible interface that is not just only for beginners. Key Features: 1. Edit PDF Document - You can add or delete texts as well as edit the text's properties and formats such as its font style, font color, and size. - You can also crop, rotate, replace, extract or delete images. 2. Annotate PDF - Easily highlight, underline, and strike out those parts. You can also add shapes, sticky notes and text boxes for a quicker and easier means of adding texts. 3. PDF Page Management - Rotate, delete, extract and rearrange PDF pages as you need. 4. View and Navigate PDF Files - Flexible reading mode such as single page mode or double-page mode.
    Starting Price: Free
  • 16
    Systweak PDF Editor

    Systweak PDF Editor

    Systweak Software

    To work & edit PDFs, Systweak PDF Editor offers a range of features and tools. Using them, you can mark text for redaction, OCR PDF, sign, split, compress, batch convert, lock, unlock, and make other changes.
    Starting Price: $69.95
  • 17
    MuPDF

    MuPDF

    Artifex Software

    Add powerful PDF functionality to all of your software application projects. MuPDF is a highly versatile, customizable PDF SDK that can be used as a PDF renderer, viewer, or library. The tiny footprint and lightning-fast performance make MuPDF a perfect fit for mobile browsers, eBooks, and embedded applications where small size is key. MuPDF supports a variety of interactive features including annotations, form filling, digital signatures, redactions, text search, and progressive loading. The wide range of input and output formats and our full range of platform support deliver a flexible solution to easily and successfully fulfill your project’s unique needs. MuPDF supports PDF, XPS, OpenXPS, EPUB, FictionBook 2 and CBZ. The MuPDF API easily integrates with all of the major platforms including Android, iOS, Linux, macOS, OpenBSD, and Windows. C++ and Python bindings have been added making it easy to use the MuPDF library from these languages.
    Starting Price: $749/per platform*
  • 18
    Able2Extract Professional
    Convert, create, edit, OCR, compare, and sign PDFs. Customize the interface language and its appearance from light to dark themes for working with PDFs comfortably. Tailor your conversions by selecting a page, a paragraph, or even a single line for conversion. Custom PDF to Excel conversion to convert complex PDF table data to Microsoft Excel with pinpoint precision and a Smart Layout Detector for keeping table styles intact. Edit PDF text and pages. Annotate and redact PDF content. Sign PDF documents. Fill, edit and create PDF forms. Split documents into even parts. Convert scanned PDFs in English, French, Spanish, and German. Automate the batch PDF conversion process by queuing up a large volume of PDF files and even whole directories. Batch create PDF from a wide range of formats and merge all PDFs into one file. Create secure PDFs from blank pages or existing documents by adding passwords and file permissions. Able2Extract Professional: Your Swiss Army Knife for PDF files.
    Starting Price: $149.95/one-time/user
  • 19
    PDFgear

    PDFgear

    PDFgear

    PDFgear is an all-in-one PDF solution that helps users view, edit, protect, convert, sign, annotate, organize, OCR, Copilot, organize PDF files, and make more possibilities on Windows, MacOS, iOS, and iPadOS. PDFgear offers all expected functions in its clean and straightforward interface so users could enjoy their document reading and editing experience without disturbance. PDFgear Copilot provides more possibilities as a personal document assistant. As it's powered by AI, users could easily manipulate all PDFgear functions and chat with PDFs by asking PDFgear Copilot. Get lost in various functions and comprehensive document content? Don't worry! Just ask Copilot! It will cover everything. With PDFgear and Copilot in it, processing PDF is like a walk in the garden.
    Starting Price: Free
  • 20
    PDNob PDF Editor
    PDNob PDF Editor is an advanced, AI-powered solution designed to simplify and enhance PDF management for users on Windows and Mac. Offering a comprehensive suite of tools, it empowers users to view, annotate, edit, convert, perform OCR, organize, protect, and summarize PDFs effortlessly. Its intuitive interface makes navigating and managing documents a breeze, whether you’re working with simple files or complex projects. One of its standout features is AI integration, enabling intelligent document summarization and translation for seamless global communication. The Optical Character Recognition (OCR) tool converts scanned documents and images into fully editable and searchable files, turning paper-based workflows into digital efficiency. PDNob PDF Editor also excels at file organization, allowing users to merge multiple PDFs, split documents, compress file sizes, and rearrange pages with ease. Security is a priority, offering password protection and encryption.
    Starting Price: $35.99/year/1 user
  • 21
    SignFlow

    SignFlow

    PDF Technologies

    Simple but mighty! SignFlow makes reading, annotating, editing, e-sign, organizing, filling, secure PDFs effortless! Packed with essential PDF tools, SignFlow is your best PDF files partner. SignFlow allows you to apply a legally-binding digital signature in PDFs, and it provides an effortless PDF solution for you to create, edit and fill out PDF forms. You can edit text in PDFs like word, manage and edit PDF pages, annotate and view your PDFs. Enjoy different reading modes, such as Full-Screen, Single Page, Read Mode, Split View, Multi-tab. You can smoothly scroll pages and switch between day mode, night mode and eye-protection mode. Annotate to remember! You can highlight, underline, strikethrough texts in PDF. There are colors for you to emphasize different information. Enrich your PDFs with standard business stamps like APPROVED, digital stamps, dynamic stamps and custom text/image stamps.
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    Xodo

    Xodo

    Apryse

    With Xodo, you can edit, annotate, sign, and share PDFs on desktop, mobile, and web. Xodo makes working with PDFs quick and easy, so you can get things done. Gone are the days of printing and faxing. Sign contracts, expense reports, cover letters, or any other document on your smartphone or tablet, using just your finger or stylus. Sign it then and there. Instead of fumbling for a pen or wasting printer ink, use just your finger to sign any document. Save your signature to sign future documents instantly with just a tap of your finger or a click of the mouse. Then save and share with whoever needs it. What used to take back and forth emails can now be done in seconds. Xodo takes the stress out of filling forms. Simply complete forms on the go from your smartphone or tablet by typing onscreen for fill-in fields and tapping to select checkboxes and other options. Save time and energy. Fill in forms from your smartphone or tablet, then save and share with whoever needs to see it.
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    KDAN PDF Reader

    KDAN PDF Reader

    Kdan Mobile Software

    KDAN PDF Reader is your all-in-one PDF solution. Edit, sign, OCR scan, convert, annotate, and fill forms in PDF documents. With innovative AI features, speed up your document workflow! Designed for Mac, iPhone, and iPad, KDAN PDF Reader is trusted by millions for its comprehensive features and efficiency. AI FEATURE • Analyze and extract key information or tables from a PDF, then convert the data into spreadsheets for further analysis or visualization. • Chat with PDF and get document analysis, advice, new ideas, or content summary • Text redaction - automatically identify and block sensitive information in a document
    Starting Price: $59.99/year (billed annually)
  • 24
    TinyWow

    TinyWow

    TinyWow

    TinyWow provides free online conversion, pdf, and other handy tools to help you solve problems of all types. All files both processed and unprocessed are deleted after 1 hour. Convert PDF to JPG and download each page as an image. Convert PDF to PNG and download each page as an image.
    Starting Price: $5.99 per month
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    PDF.live

    PDF.live

    PDF.live

    With PDF.live, you can convert PDFs into other file formats and vice versa. Convert Word docs, Excel sheets, PowerPoint presentations and JPEGs. PDF.live is cloud-based, so you don’t need to download and install anything, and it works on any internet-connected device. Click and drag your document, follow the prompts, and you can easily sign, annotate, edit text, compress, merge and a whole lot more with this free online PDF editor.
    Starting Price: $3.95/month/user billed yearly
  • 26
    PDF Guru

    PDF Guru

    PDF Guru

    Convert, edit, merge, and compress PDFs with just a few clicks. Download your document quickly and with ease. Our PDF converter can create PDF files in seconds! We use HTTPS encryption to protect your digital data when you make PDF files on our platform. Redact a PDF, modify text, add new objects, and perform even more actions all in one place. We designed an intuitive interface so that you can use our PDF maker without any hassle. Our PDF maker works online on all platforms, whether it's Windows, Mac OS, Linux, iOS, or Android. If you don’t want others to open, edit, or print your file, you can lock or restrict access to it.
  • 27
    novaPDF

    novaPDF

    Softland

    Using novaPDF Pro you can easily create high quality searchable PDF files in an affordable and reliable way from any Windows application. It installs as a printer driver and helps you generate the PDF files by simply selecting the "print" command from any application (you can convert Word documents, Excel sheets, PowerPoint presentations, AutoCad drawings, emails or web pages). You can password protect the PDF files you create and permissions can be restricted to prevent the document from being viewed, printed, modified, copied or annotated. Your PDF files will be secured with 40-bit and 128-bit encryption algorithms. Features include: customizable resolution, PDF security, PDF links, PDF bookmarks, text/image compression, profiles and more. novaPDF also includes a PDF SDK for developers that want to integrate PDF creation capabilities in their software.
    Starting Price: $19.99 (one time payment)
  • 28
    HiPDF

    HiPDF

    Wondershare

    Wondershare HiPDF is an AI-powered online PDF solution that offers a wide range of features such as chatting with PDF, AI reading, editing, converting, and managing PDF documents. With its user-friendly interface and free plan, HiPDF allows users to easily summarize, explain, rewrite, merge, split, compress, convert, rotate, unlock, and protect PDF files with just a few clicks. As a member of the PDF Association and having received internationally recognized certifications such as ISO 27001 and SSI SECURE, HiPDF ensures both simplicity and security in editing PDFs, having processed millions of files cumulatively.
    Starting Price: $5.99 per user, per month
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    CoolNew PDF

    CoolNew PDF

    CoolNew Software

    CoolNew PDF offers all-in-one experience to awesomize your PDF experience. All the tools you’ll need to be more productive and work smarter with documents.21 tools to convert, compress, and edit PDFs . Conversion features include CAD, office, image, texted and scanned copy conversions. Editing features include text, image, eraser, page number, size, watermark, paragraph and more. Users can combine or split PDFS, extract contents and optimize pdfs. merge and compress PDF. Reading and annotation features included. It edits, annotates, converts and combines file by one click, makes your tasks finish faster. CoolNew PDF offers you a familiar experience for editing PDF, just like you did it in Office.
    Starting Price: $6.49
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    AmindPDF

    AmindPDF

    AmindPDF

    AmindPDF's user interface is very user-friendly and makes the operation of PDF easy. It can recognize PDF text as paragraphs or whole blocks of text, allowing users to edit text directly and smoothly, like in MS Word. for PDF protection, it allows adding passwords, setting document permissions, placing signatures, adding watermarks to PDF It also supports batch operations to process files, such as merge/split tool, compression tool, creation tool, Bates numbering tool, and conversion tool, so users can process multiple PDF files at once. AmindPDF is available for a number of platforms: Windows, iOS, and Android. Users are able to use the same PDF tool on a computer or mobile phone. So AmindPDF let you process or edit PDFs anytime, anywhere.
    Starting Price: $9.90
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PDF Annotation Software Guide

PDF annotaters are versatile tools that allow users to modify PDF documents with various markups. They enable users to add comments, notes and other annotations to any PDF. Such annotation features can range from simple highlighting and underlining text for emphasis, to more complex forms of markup such as adding shape elements and freehand drawings on the document.

Annotating a PDF with a PDF annotater is often quicker than printing out the entire document and editing it manually by hand or with a pen or pencil. Annotation tools also provide added benefits such as improved document security, reduced paper waste, digital archiving capabilities, and ease of collaboration with multiple people viewing and contributing to the same document at once.

The type of annotations available in each annotator may vary depending on the platform or software being used. Some of the most common annotation tools are sticky notes which allow text-based notes to be placed anywhere within a document; highlights which are used to draw attention to specific parts of text; underlining which is similar but without affecting the text itself; shapes which allow users to draw rectangles, ovals and other shapes onto their documents; stamps which are pre-made images representing approvals or rejections that can be placed onto documents; freehand drawing for scribbling sketches over an existing file; typewriter for adding typed information directly into an existing file; links for creating hyperlinks inside documents; signature field for applying digital signatures onto documents; bookmarks which help users quickly navigate between sections of a document easily.

In addition, some platforms will also offer collaborative annotation capabilities so that multiple people can contribute their own annotations in real time – something not possible when marking up physical copies by hand. This means team members can have meaningful discussions about content in more efficient ways than ever before.

Overall, PDF annotaters provide great utility for anyone looking to review or comment on existing files quickly without having to print them out first. By taking advantage of these powerful tools you can reduce wasted paper while simultaneously improving your communication workflow with colleagues and customers alike!

PDF Annotator Features

  • Add Text: Most PDF annotaters allow users to add text to a PDF document. This feature allows users to easily highlight or add comments and notes to documents.
  • Highlight Text & Images: Annotaters also provide tools for highlighting text and images in a document. This is useful for quickly calling attention to important sections of a document.
  • Draw Shapes & Lines: Some tools also offer the ability to draw shapes and lines on documents. This can be used for a variety of purposes, such as underlining or circling words, drawing arrows, and adding additional visual aids.
  • Insert Images: Another useful feature that many annotaters provide is the ability to insert images onto a document. This can be helpful when adding diagrams, charts, or other visuals that are not already included in the PDF file.
  • Strikeout/Replace Text: Some PDF annotaters also give users the option of striking out existing text and replacing it with new text. This feature is especially useful when making edits or corrections to documents without having access to the original source file.
  • Stamp Documents: Many annotaters have the option of stamping documents with various stamps such as “approved” or “draft” stamps that can help indicate the status of an item without needing additional comments or annotations from reviewers.
  • Add Sticky Notes: Finally, many annotaters provide the ability to add sticky notes to a document. This can be useful for leaving comments or reminders for readers of the document without having to actually write the comment directly on the page.

Types of PDF Annotators

  • Markup Annotators: These tools allow users to highlight, underline, add shapes and arrows, draw free-form lines and shapes on the PDF document. They also provide other formatting options such as font style, color, size and alignment.
  • Commenting Annotators: These types of annotators allow users to insert comments into the PDFs. Users can type their comments or insert annotations from a comment library. Annotations are displayed in a sidebar for easy viewing.
  • Sticky Notes Annotators: This type of annotator allows users to add sticky notes or floating text boxes to the PDF documents for annotating purposes. The sticky notes are visible even after zooming in/out or scrolling up/down the page.
  • Text Box Annotators: This type of annotator allows user to add interactive text boxes to PDFs in which they can enter information that will be saved along with the document when it is closed. Additionally, text boxes usually have features like drag and drop capabilities and expanded character set support.
  • Signatures Annotators: This type of annotator enables users to sign digital documents by inserting an electronic signature into the document itself instead of scanning a physical signature in order to authenticate it digitally.
  • Link Annotators: This type of annotator allows users to create hyperlinks within a document so they can easily navigate between various elements within the PDF file or link outwards towards other websites and documents on the internet.
  • Multimedia Annotators: This type of annotator enables users to embed multimedia elements such as audio, video, and images into a PDF document. This is useful for creating interactive documents with rich media content.

Benefits of PDF Annotators

  1. Ease of Use: PDF annotaters are designed to be easy to use, so users with limited technical knowledge or computer skills can add notes, drawings and other annotations without difficulty.
  2. Efficient Editing: PDF annotaters allow users to quickly and easily make changes to a document without having to print it out and write on the physical page. This saves time and paper costs.
  3. Enhanced Collaboration: By using a PDF annotater, multiple users can work on the same document in real-time from different locations. This allows for quicker decision-making as well as improved collaboration between team members.
  4. Security: Many PDF annotaters provide enhanced security features such as password protection or encryption that protect documents from being accessed or modified by unauthorized persons.
  5. Cost Saving: Using a PDF annotater eliminates the need for printing documents out on physical paper, saving money in terms of both materials and ink costs.
  6. Flexibility: With a wide range of annotation tools available, including text boxes, highlighting, drawing tools and more, PDF annotaters offer unprecedented flexibility when it comes to personalizing documents.
  7. Compatibility: Most PDF annotaters are compatible with a wide range of file formats and operating systems, making it easy to open and edit documents regardless of their origin or the user's device.

Who Uses PDF Annotators?

  • Students: Students often use PDF annotators to make notes, highlight text, and add comments to their reading materials.
  • Professionals: Professionals may use PDF annotators to track changes in documents as they edit them, add signatures or stamps for approval, and fill in forms.
  • Teachers: Teachers can use PDF annotators to provide feedback to students on submitted assignments, grade papers, and create documents for digital classes.
  • Researchers: Researchers can use PDF annotators for marking up research materials, creating annotations, and tracking changes among multiple collaborators.
  • Writers: Writers may use PDF annotators to highlight key passages from documents they read, make notes on important ideas, and write drafts of their work.
  • Legal Professionals: Legal professionals can utilize PDF annotators to add case law and statutes to legal documents or contracts, stamp or sign them electronically, and mark up text as they review files.
  • Business Users: Business users may use PDF annotators to fill out forms online (e.g., tax forms), mark up contracts during negotiations, track changes in proposals made by clients or vendors, and collaborate on documents with remote colleagues.

How Much Do PDF Annotators Cost?

The cost of PDF annotaters can vary quite a bit, depending on the features and capabilities offered. Basic PDF annotation tools may be relatively inexpensive, costing anywhere from a few dollars to around $50 or so. More advanced annotation tools are available for more complex tasks, such as collaboration and document security. These more advanced tools usually come with an associated subscription fee, which can range from about $10/month to $80/month or more. Additionally, business-level solutions may require additional setup fees or other charges.

It's also important to note that some companies offer free trials or discounts for annual subscription plans. When shopping for a PDF annotater, it's important to consider your budget and the specific features you'll need in order to get the most value out of your purchase. Comparing similar products side-by-side can help you find the best deal for your needs.

What Integrates With PDF Annotators?

There are various types of software that can integrate with PDF annotaters. For example, document management systems such as Box and Egnyte, project management tools such as Trello and Asana, task management apps like Todoist and Trello, cloud storage services like Dropbox and Google Drive, workflow automation systems including Zapier and Workato, and collaboration tools like Slack. In addition to these, other database-driven applications (such as Salesforce or QuickBooks), graphics editors (such as Adobe Photoshop) and content creation programs (such as Microsoft Office) can also be integrated with PDF annotaters. This allows users to quickly view documents in their native format while still enabling them to add comments or annotations inside the document itself.

PDF annotation may also be a feature of a broader PDF editor.

PDF Annotator Trends

  1. Annotating PDFs is a growing trend as the demand for more cost-effective and efficient document creation and sharing workflow increases.
  2. There are many different tools available to help with annotating PDFs, ranging from free online tools to full-featured desktop applications.
  3. The most popular type of annotation tool is an eSignature tool, which allows users to sign documents digitally without having to print them out.
  4. Many new annotation tools are becoming available that allow users to add text, drawings, stamps and highlights directly on the PDF page, making it easier to collaborate on documents without needing multiple copies of the same document.
  5. Cloud-based annotation tools are increasing in popularity due to their convenience; they allow users to access their documents from any device with an internet connection.
  6. Mobile devices with touchscreens have increased the popularity of handwriting recognition technology, which enables handwritten annotations on mobile devices without needing a stylus.
  7. AI technologies such as optical character recognition (OCR) and natural language processing (NLP) are being used in PDF annotation tools to automatically detect text or determine sentiment in documents for more efficient reviews and feedback loops.
  8. PDF annotation tools are also beginning to incorporate artificial intelligence (AI) features such as auto-summarizing long documents and auto-detecting topics, making it quicker and easier to locate information in large documents.
  9. Security is becoming a top priority for many users; new annotation tools are offering features such as encryption and digital signatures to help ensure document security.

How To Select the Right PDF Annotator

  1. Experience: Look for PDF annotaters who have experience using the platform or software you plan to use. They should also have a proven track record of completing tasks effectively and accurately.
  2. Attention to detail: Make sure that the candidate is detailed-oriented and precise when it comes to providing annotations in a precise and clear manner. Additionally, make sure they have an understanding of the types of annotations you are looking for in your documents.
  3. Availability: Ensure that the candidate has enough time available to do the annotation tasks within your desired timeframe. Ask them about their availability and if they can commit to meeting deadlines as needed.
  4. Reliability: Make sure that the person you are considering is reliable by asking for references from prior employers or clients who can vouch for their work ethic and reliability on past projects.
  5. Communication skills: Make sure that the candidate has good communication skills and can communicate effectively with you about any concerns or issues they may have with the tasks.