Alternatives to Rocket Validator
A hosted crawler that runs HTML, CSS and accessibility checks across thousands of site pages. The listings below can replace it for an important use case. Each note says what changes if you switch.
The original
Rocket Validator
A hosted crawler that runs HTML, CSS and accessibility checks across thousands of site pages.
Replacements
Listings that take over the same core job as Rocket Validator.
SortSite
Website quality scanner testing accessibility, broken links, browser compatibility and SEO against over 1200 checkpoints.
SortSite adds broken link, browser compatibility and SEO checks to accessibility testing, and its free demo needs no install but covers only the first 10 pages.
EXPERTE Accessibility Checker
An online checker that crawls a website and tests each page for accessibility problems.
EXPERTE Accessibility Checker crawls a whole site for free with 41 accessibility checks, but it does not validate HTML or CSS and only works on public pages.
Tanaguru Engine
An automated accessibility testing engine that checks websites and web applications against RGAA and WCAG.
Tanaguru Engine is self-hosted and automates about 380 accessibility tests against RGAA and WCAG, but it does no HTML validation and its product page is mainly in French.
WAVE
A suite of web accessibility evaluation tools, available online and as browser extensions.
WAVE shows accessibility issues in place on each page through free extensions, while site-wide bulk testing needs its paid API or engine and it skips HTML validation.
Pa11y
Open-source command-line and dashboard tools that test web pages for accessibility issues automatically.
Pa11y is free open-source software you run yourself, with a CLI, CI tool and self-hosted dashboard, but it covers accessibility rather than HTML validation.
Also worth comparing
These listings name Rocket Validator as their own alternative, so the relationship runs both ways.
AChecker
Online accessibility checker that tests a URL, uploaded file or pasted HTML against WCAG and Section 508.
Rocket Validator runs HTML and accessibility checks across up to 5,000 pages per report, as a paid hosted service requiring an account.
Asqatasun
Open-source, self-hosted engine that audits web pages and whole sites for accessibility and SEO.
Rocket Validator is a paid hosted crawler checking HTML and accessibility on up to 5,000 pages per report, so there is no server to run yourself.
axe DevTools
Accessibility testing tools and browser extension from Deque, built on the axe-core rules engine.
Rocket Validator is a paid hosted crawler running accessibility and HTML checks across up to 5,000 pages, with scheduling and an API.
Nu Html Checker
The W3C's online checker that tests HTML documents against current HTML conformance rules.
Rocket Validator is a paid hosted crawler that runs HTML and accessibility checks across up to 5,000 pages per report instead of one document.
W3C CSS Validation Service
The W3C's free service for checking CSS and style sheets in HTML documents.
Rocket Validator is a paid hosted crawler that runs CSS, HTML and accessibility checks across up to 5,000 pages per report, instead of one style sheet at a time.
W3C Markup Validation Service
The W3C's free service for checking the markup of HTML and XHTML documents.
Rocket Validator is a paid hosted crawler that runs HTML and accessibility checks across up to 5,000 pages per report instead of one document at a time.
Similar software
Related functionality, not a direct replacement.
AccessibilityChecker.org
Web accessibility scanner that audits a site against WCAG and ADA and explains how to fix issues.
W3C Link Checker
An online W3C tool that finds broken links and anchors on a web page or whole site.
