Top 5 PDF Remediation Softwares

Digital accessibility guarantees equal access to information for all, including individuals with disabilities, by making digital content usable. It is essential in today’s digital world for inclusivity and equal participation. PDFs, or Portable Document Format, are widely used for various purposes, including document sharing and storage, e-books, and online forms. However, without proper remediation, many digital files can be difficult or impossible for some individuals to access, particularly those with visual impairments, cognitive disabilities, or mobility impairments.
This is where PDF remediation tools come in. They are software solutions that make PDF files accessible to individuals with disabilities. These tools are an essential part of digital accessibility. They help to ensure that all individuals, regardless of their abilities, have equal access to information and can use digital content independently.
Creating a tagged PDF is the first step in ensuring accessibility for people who use assistive technology, such as screen readers. The tag tree is a hierarchical structure that describes the different types of content in a document, such as headings, paragraphs, lists, figures, and tables. It helps users with disabilities navigate the document and understand its structure and meaning.
Standards organizations – the W3C and ISO have guidelines and standards for document accessibility, such as WCAG 2.1 and PDF/UA, to ensure documents are appropriately tagged and accessible to all users.
When creating or editing a document, it’s essential to verify the correct tags are used, adjust the reading order, add Alt-text descriptions for images, and check for proper navigation heading levels. This ensures the document is accessible to all users and reduces legal risks. This article compares different tools for creating accessible PDFs and their performance in ensuring accessibility for individuals with disabilities. It can be valuable for businesses and organizations looking to improve their digital content accessibility and individuals creating accessible PDFs.


PREP is a comprehensive PDF remediation and accessibility solution that utilizes advanced AI technology to make high volumes of documents and pages fully compliant with accessibility standards such as Section 508, WCAG 2.1, PDF U/A, and ADA. Our proprietary tool, PREP, enables efficient and cost-effective remediation with quick turnaround times for creating fully accessible PDFs ready for immediate use.

With PREP, users can quickly review and modify document structure, utilizing the platform’s intuitive features. Additionally, our built-in accessibility report checker allows for identifying and correcting flagged issues, ensuring that the final document meets all necessary accessibility standards. Our service is designed to cater to businesses, organizations, and individuals looking to ensure that their documents are accessible to all.


  • Supports multiple formats: PDF, PowerPoint (PPTX), HTML, Word, and ePub3 formats are easily transformed to make them accessible.
  • Meets and exceeds compliance standards: Fully accessible & Section 508, WCAG 2.1, PDFU/A and ADA compliant.
  • Quick turnaround: Accelerated remediation and accessibility services with short delivery timelines and turnaround.
  • Highly scalable: Thousands of documents are remediated in just a few weeks.
  • High accuracy: Verified and tested by experts through the PDF accessibility validation process.
  • Affordable: Reliable PDF remediation services are offered at competitive prices with a fixed-rate structure.

2. CommonLook PDF Validator

CommonLook PDF is a professional document remediation tool that has been widely used for many years. It works with Adobe Acrobat Pro DC as an “all-in-one” solution for testing, remediation, and verifying PDF documents to various accessibility standards.


  • All-in-one solution for testing, remediating, and verifying PDF documents for compliance with various accessibility standards.
  • Proven workflow that allows for 100% compliance.
  • Time-saving tools include automatically tagging tables, lists, and tables of contents.
  • Ability to quickly assign the list numbering attribute for lists.
  • Comprehensive features and functionalities to achieve compliance with minimal effort.
  • Eliminates the need to use multiple tools to do testing.


  • Currently only available for PC users.
  • Can only open one PDF at a time.
  • Cannot automatically add tags to an untagged PDF.

3. Equidox

Equidox is a cloud-based PDF remediation software solution offered by Onix that aims to convert inaccessible PDF documents into WCAG 2.0 AA-compliant HTML and accessible PDF formats. Additionally, it features an auto-tagging tool that uses smart detection to determine the appropriate tags for the document.


  • User does not require knowledge of accessibility or the Tag tree.


  • Higher chance of error as the user is not directly working with the tags in the document.
  • Does not tag PDF files to the standards or provide a compliance report.
  • Converting PDF to HTML may not be suitable for some organizations.

4. Adobe Pro DC

Adobe Acrobat Pro DC is a software application and a family of web services developed by Adobe Inc. to view, create, manipulate, print and manage Portable Document Format (PDF) files. It offers features for creating, editing, and using PDFs, including importing document and image formats and saving them as PDFs. Advanced features include tag creation and editing, alternative text, and tab order.


  • Allows for manual checks, such as verifying appropriate alt text, to achieve a fully accessible document.
  • Allows for the creation of tags, even from an untagged document.
  • Enables correct reading order and
  • Can correct a few color and contrast issues.
  • Allows for adding and editing metadata, including title and language, which are required by standards.


  • Passing the Accessibility Check-in Acrobat does not guarantee compliance with any accessibility standards (WCAG 2.0/2.1 or PDF/UA), and there are often many remaining accessibility issues to be fixed.
  • Accessibility Check only tests checkpoints that can be verified with automation and requires manual validation.
  • Third-party testing tools like CommonLook’s PDF Validator or PAC3 are needed to verify standards compliance.
  • Many tasks in Acrobat working with the Tag tree are complex and time-consuming, and functions like remediating data tables and Assigning ListNumbering to lists are challenging.
  • Acrobat Pro DC does not have an “undo” feature, which means the user may be forced to start over if mistakes are made.

5. Abby FineReader

Abbyy FineReader is a powerful OCR software that can convert scanned documents, PDFs, and images into editable formats such as Microsoft Word and Excel. It uses advanced OCR technology to recognize text, tables, and handwriting in over 190 languages, making it ideal for digitizing paper documents and making them more easily searchable and editable. Some key features include automatic image enhancement, exporting to various formats, and processing password-protected and digitally signed PDFs.


  • Exceptional quality OCR for converting printed materials to digitally accessible documents
  • Ability to prepare universally accessible documents using PDF/UA format
  • Support for access via text-to-speech, magnification software, and other assistive technologies
  • Background recognition for handling text content of any PDF scanned or digitally created
  • Table recognition for extracting content within tables
  • Option to export to PDF/UA for easily accessible documents
  • Integration with mobile devices for capturing and recognizing documents directly from a student’s mobile phone
  • User-friendly assistive features such as an easy-to-use and intuitive interface
  • Keyboard shortcuts for many operations


  • Lack of document change history in the account
  • No tool for merging multiple files into one
  • Preview function may not work properly
  • Manual editing may be required
  • Some users may find it inferior to other PDF software like Adobe Acrobat Pro
  • Primarily used for scanning and processing standard documents like contracts, surveys, and questionnaires


PREP is the leading tool for ensuring the accessibility of PDF documents. It offers comprehensive compliance with specific accessibility standards and a user-friendly interface that makes navigating easy for users of all technical levels. Additionally, the tool supports various file formats, including PDF, Word, PowerPoint, and more, making it a versatile solution for remediating various documents. With a built-in accessibility checker, PREP allows users to evaluate the accessibility of their documents before they are published, ensuring compliance with industry standards.
If you are looking to ensure the accessibility of your documents, PREP is the ideal solution. And with its comprehensive features, training, and support, your teams can seamlessly incorporate the tool into their processes.
Please feel free to request a free consultation or product demo: PREP.

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