Contraste Alternatives

Free tool for testing how good your website is, and what you can do to improve it. Check accessibility, SEO, social media, compliance and more.

Plagiarism scanner that detects plagiarism in your text.

Flagsmith lets you manage feature flags and remote config across web, mobile and server side applications. Deliver true Continuous Integration. Get builds out faster. Control who has access to new features. We're Open Source.

Try for free Open Source freemium

Instantly check or copy computed CSS from any element for only ~95$

Modern web accessibility tools for agencies & webmasters

paid Free Trial $49.0 / Monthly (Standard, 3 Websites, Unlimited Pages, Unlimited Page Views)

HTML Validator is a Mozilla extension that adds HTML validation inside Firefox and Mozilla.

Total Validator can check your website to help ensure that it is accessible, uses valid HTML and CSS, has no broken links, and is free from spelling mistakes.

An accessibility visualization toolkit from Khan Academy

Check and adjust web element contrast in real time.

A stream-lined CLI to easily test for web accessibility

Site-wide Accessibility and HTML validation made easy. With a single click, Rocket Validator will check thousands of web pages on your site for Accessibility and HTML conformance, producing a detailed, actionable report on seconds.

paid Free Trial $36.0 / Monthly (25,000 HTML checks/month, 1,000 docs/report, 5 requests/second)

Automatically detect accessibility (a11y) issues on webpages

A real-time edit tool for CSS, LESS and SCSS.

A growing list of accessibility tools and resources