About ZeroKit.dev

ZeroKit.dev provides free, fast developer tools that respect your privacy. No accounts, no tracking cookies, no data collection. Just tools that work.

What We Offer

The site currently includes 140+ tools covering formatting, encoding, generation, conversion, CSS utilities, text processing, image handling, and network diagnostics.

• 39 client-side tools — everything runs directly in your browser. Your data never leaves your machine.
• 27 server-side API endpoints — the eight classic diagnostics (DNS, SSL, HTTP headers, WHOIS, redirect checker, status, email validator, tech detect), the AI Readiness suite (ai-readiness, llms-txt-validate, robots-txt-validate, schema-inspect, og-inspect, cloak, batch, badge, llms-txt generator), the leaderboard APIs (live, rank, history, movers), plus public stats, sitewatch, health. These require server-side requests by nature. Request URLs are logged by Caddy for 24 hours max in a rotated file (10 MB per slice, 5 slices) for operational debugging and spam detection. Nothing is stored in a database.

Privacy First

Most tools run entirely in your browser using JavaScript. No data is sent to any server. For the network tools that require server-side processing, request metadata (URL, user-agent, timestamp, status code) is recorded in a rotated Caddy access log for at most ~24 hours so we can debug issues and block spam. The log contents are never shared with third parties and are not retained in any database.

Open Source

ZeroKit.dev is open source. You can inspect the code, report issues, or contribute on GitHub.

Contact

Questions, feedback, or custom tool requests — reach out any time.

hello@zerokit.dev