About HTMLToolkit

HTMLToolkit is a free, open collection of browser-based tools built for web developers and designers. Every tool runs entirely in your browser — no data is sent to any server, no account required, no tracking.

What we offer

• ADA / Design tools — color accessibility checker, web-safe font tester, font pairing suggester
• CSS tools — gradient generator, box-shadow generator, unit converter
• Web / SEO tools — image hotspot mapper, meta tag SEO tester

Our principles

Tools should be fast, focused, and frictionless. We don't ask for your email. We don't store your work. We don't run trackers. The only third-party code on this site is Google Fonts (for typography) and Google Ads (to keep the lights on).

Accessibility

We aim to build tools that meet WCAG 2.1 AA standards ourselves. All tools support keyboard navigation and include appropriate ARIA attributes. If you find an accessibility issue, please reach out.