Best Web Accessibility Testing Tools for Linux

CSS HTML Validator for Windows, Mac, and Linux is a fast, powerful, highly user configurable, and easy to use web development tool that checks HTML, CSS, SEO, spelling, accessibility (including WCAG 2.0/2.1/2.2), PHP, XHTML, JavaScript, htmx, and links. CSS HTML Validator includes batch processing (in the Pro edition), integrated HTML/CSS editing, and much more. It works offline so it's super-fast and your privacy is protected because your documents are not uploaded to a server for checking. CSS HTML Validator Pro has superior customization features so you can configure the validation to your liking. You can even add your own validator messages, recognize your own HTML elements and attributes, and much more. Try CSS HTML Validator Pro for Windows free for 200 validations or 30 days, whichever comes first. A FREE limited version of htmlval for Mac and Linux is also available.

All in One Accessibility® is an AI based accessibility tool to enable websites to be accessible among people with hearing or vision impairments, motor impaired, color blind, dyslexia, cognitive & learning impairments, seizure & epileptic, ADHD, & elderly. It installs in just 2 minutes. It reduces the risk of time-consuming accessibility lawsuits by improving accessibility compliance for the standards WCAG 2.0, 2.1, 2.2, ADA, Section 508, European EAA EN 301 549, Canada ACA, California Unruh, Israeli Standard 5568, Australian DDA, UK Equality Act, Ontario AODA, Indian RPD Act, GIGW 3.0, France RGAA, German BITV, Brazilian Inclusion law LBI 13.146/2015, Spain UNE 139803:2012, JIS X 8341, Italian Stanca Act, Switzerland DDA & more. It supports 140+ languages. It is a cornerstone of improving web accessibility through its ease of use for companies of all sizes and with the help of paid add-ons like manual accessibility audit, remediation, PDF accessibility remediation, and VPAT/ ACR.

Accesstive is a human-first accessibility platform that combines expert-driven compliance solutions with AI-powered automation to make the web usable for everyone. Its all-in-one system includes customizable widgets, live audits, continuous monitoring, and AI agents to remediate accessibility issues in real time. With features like font adjustments, color contrast tools, text-to-speech, and reading guides, Accesstive ensures inclusive browsing experiences for all users. The platform supports businesses in meeting global accessibility standards, including ADA, Section 508, WCAG, and the EU Accessibility Act. Regular AI-driven audits help teams stay ahead of compliance issues while reducing legal risks. Trusted by businesses worldwide, Accesstive empowers organizations to create accessible websites and champion inclusivity.

Test Evolve is a powerful reporting solution designed to give product owners and senior management access to detailed information on the real-time performance of their products. Test Evolve allows users to customize up to 8 different dashboards, providing an at-a-glance summary of the operation's performance. Users can easily switch between different levels of detail as needed, and quickly drilling down into important insights regarding test failure. At the runtime view, all failing tests are highlighted and provide direct links to investigate further with full stack traces and additional failure details. Streamline the bug diagnosis process with Test Evolve and make sure that time-critical issues don't slip through the cracks.

Perform enterprise-level accessibility audits and meet your compliance needs with advanced reporting, monitoring, and management of accessibility issues against industry standards or customized guidelines. Axe Monitor helps ensure your large website becomes accessible and remains accessible. Dynamically scan, monitor and report on the accessibility status of your site across business and development teams. Modern web applications driven by large content management systems require automated tools capable of handling unexpected page hierarchies and linking structures. Axe Monitor is designed to follow links dynamically, and allows for scripting of basic user flows to trigger event-driven content and bypass user authentication. Large websites are constantly changing and adding new content. Axe Monitor links content creators, designers, developers and project managers to ensure accessibility throughout the workflow.

Recite Me Accessibility Toolbar is one of the leading WCAG & ADA Compliant Toolbars. Enabling users to customize and alter your websites design to fit their specific needs. Perfect for users who experience visual, cognitive and mobility impairments, in addition to a range of other disabilities. Furthermore, Recite Me offers an Accessibility Checker, which is free of charge and can be used to efficiently measure your websites accessibility. Allowing you to detect specific on-site accessibility issues, to fix them and improve your websites accessibility.