Alternatives to AChecker
Online accessibility checker that tests a URL, uploaded file or pasted HTML against WCAG and Section 508. The listings below can replace it for an important use case. Each note says what changes if you switch.
The original
AChecker
Online accessibility checker that tests a URL, uploaded file or pasted HTML against WCAG and Section 508.
Replacements
Listings that take over the same core job as AChecker.
WAVE
A suite of web accessibility evaluation tools, available online and as browser extensions.
WAVE covers current accessibility evaluation with in-page results and browser extensions that can check local and private pages, similar to AChecker's unpublished HTML checks.
axe DevTools
Accessibility testing tools and browser extension from Deque, built on the axe-core rules engine.
axe DevTools uses the axe-core engine in the browser and in CI pipelines, but it does not accept pasted HTML or file uploads like AChecker.
AccessMonitor
A Portuguese government web service that checks web pages against WCAG 2.1 accessibility practices.
AccessMonitor checks against the newer WCAG 2.1 and gives a 0 to 10 score, though it works by URL and its interface is mostly Portuguese.
ARC Toolkit
Browser extension from TPGi that finds accessibility issues on individual web pages.
ARC Toolkit is a free browser extension from TPGi that checks the current page, including pages loaded locally in the browser.
EXPERTE Accessibility Checker
An online checker that crawls a website and tests each page for accessibility problems.
EXPERTE Accessibility Checker crawls a whole public site in one free run, but cannot check pasted markup or unpublished pages.
AccessibilityChecker.org
Web accessibility scanner that audits a site against WCAG and ADA and explains how to fix issues.
AccessibilityChecker.org gives fix instructions for each problem and an extension for single-page apps, while ongoing monitoring is paid.
Rocket Validator
A hosted crawler that runs HTML, CSS and accessibility checks across thousands of site pages.
Rocket Validator runs HTML and accessibility checks across up to 5,000 pages per report, as a paid hosted service requiring an account.
UserWay Accessibility Checker
Online scanner that checks a website for ADA and WCAG accessibility issues and gives a score.
UserWay Accessibility Checker offers a one-click URL scan with an overall score, but the free result is high level and the page promotes a paid widget.
Also worth comparing
These listings name AChecker as their own alternative, so the relationship runs both ways.
AudioEye Website Accessibility Checker
A free online scanner that checks a website for ADA and WCAG accessibility issues.
AChecker is free and checks against WCAG and Section 508 by URL, upload or pasted HTML, but stops at WCAG 2.0.
Nu Html Checker
The W3C's online checker that tests HTML documents against current HTML conformance rules.
AChecker focuses on WCAG and Section 508 accessibility and offers HTML validation only as an option, with guidelines stopping at WCAG 2.0.
Tanaguru Engine
An automated accessibility testing engine that checks websites and web applications against RGAA and WCAG.
AChecker is a free online checker accepting a URL, file or pasted HTML against WCAG and Section 508, but its guidelines stop at WCAG 2.0.
W3C Markup Validation Service
The W3C's free service for checking the markup of HTML and XHTML documents.
AChecker focuses on WCAG and Section 508 accessibility checks, with HTML and CSS validation only as an optional extra rather than the main job.
Similar software
Related functionality, not a direct replacement.
W3C CSS Validation Service
The W3C's free service for checking CSS and style sheets in HTML documents.
SortSite
Website quality scanner testing accessibility, broken links, browser compatibility and SEO against over 1200 checkpoints.
WebAIM Contrast Checker
An online checker that tests foreground and background color contrast against WCAG AA and AAA levels.
