Web & Dev

Domain Analyzer

Inspect any domain: DNS, TLS, security headers, technology, structured data and AI crawler policy. Measured live, nothing estimated.

CSS Units Converter

Convert CSS lengths between px, rem, em, percent, vw and vh in your browser. Set root and parent font-size, viewport and basis for accurate results.

cURL to Code Converter

Paste a curl command and get equivalent JavaScript fetch, axios, Python requests or Go code. Runs entirely in your browser.

Redirect Rule Tester (.htaccess & nginx)

Paste Apache .htaccess or nginx rules, enter a test URL, and see which rule fires, the resulting URL and the HTTP status code. Runs free in your browser.

Colour Converter & Contrast Checker

Convert a colour between HEX, RGB, HSL and OKLCH and check WCAG contrast against white, black or any colour. Runs entirely in your browser.