Best Web Accessibility Testing Tools for Linux of 2025

CSS HTML Validator for Windows, Mac, and Linux is a fast, powerful, highly user configurable, and easy to use professional web development tool that checks HTML/HTML5, CSS, accessibility, SEO, PHP, XHTML, JavaScript, links, htmx, and more. CSS HTML Validator will give you valuable and customizable advice while alerting you to obsolete, deprecated, and proprietary tags, attributes, and CSS. Make sure that your website visitors do not leave your site because they run into broken links or other problems caused by poorly written HTML and CSS. The latest version of CSS HTML Validator includes updated HTML & CSS support, improved accessibility checking, support for htmx, new editor color schemes, and other updates and improvements. A Batch Wizard in the Pro edition lets you easily validate entire websites and multiple HTML documents by generating a single validation report in HTML format. 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-powered website accessibility solution for WCAG 2.2 and ADA compliance. It offers 70 plus features including a screen reader, virtual keyboard, accessibility profiles, sign language Libras (Brazilian Portuguese), multi-language (supports 140+ languages), etc. The solution takes 2 minutes to install and is designed to reduce the risk of time-consuming accessibility lawsuits. Additionally, All in One Accessibility provides the Color Contrast Checker and the Accessibility Checker, which identify web accessibility issues, ensuring websites meet accessibility standards.

Test Evolve serves as an advanced reporting tool tailored for product owners and upper management, offering them in-depth insights into the real-time effectiveness of their products. With the ability to personalize up to eight distinct dashboards, Test Evolve ensures a concise overview of operational performance is always at hand. Users can effortlessly navigate through varying levels of detail, allowing for quick access to critical insights related to test failures. In the real-time view, all tests that fail are prominently displayed, complete with direct links for further investigation, including comprehensive stack traces and additional details about each failure. By leveraging Test Evolve, the process of diagnosing bugs is streamlined, ensuring that urgent issues are promptly addressed and do not go unnoticed. This powerful solution not only enhances productivity but also empowers teams to maintain high standards of quality assurance.

You can conduct enterprise-level accessibility audits. This will help you meet your compliance requirements. Advanced reporting, monitoring and management of accessibility issues against industry guidelines or customized guidelines will allow you to perform these audits. Axe Monitor ensures that your large website is accessible and stays accessible. Monitor, monitor, and report on the accessibility status for your site across all business and development teams. Modern web applications that use large content management systems need automated tools that can handle unexpected page hierarchies or linking structures. Axe Monitor can follow links dynamically and allows for scripting basic user flows to trigger event driven content and bypass user authentication. Large websites are constantly updating and adding new content. Axe Monitor connects content creators, designers and developers to ensure accessibility throughout the workflow.

Recite Me Accessibility Toolbar, one of the most popular WCAG & ADA Compliant Toolbars. Users can customize and alter the design of your website to suit their needs. Perfect for users with visual, cognitive, and mobility impairments in addition to other disabilities. Recite Me also offers a free Accessibility Checker that can be used to measure the accessibility of your website. You can detect specific accessibility issues on your website, fix them and improve its accessibility.