More tools.

Check whether a site returns a real 404 for a missing page instead of a soft 404, redirect, or server error.

A free crawler access check for search engines and AI bots.

Checks a domain's Domain Rating by Ahrefs, free, with the source next to the number.

Read Exif, XMP, and IPTC photo metadata locally, then download a clean copy without changing the encoded picture.

Check whether a username is free, taken, or could not be checked on GitHub, npm, X, Reddit, Bluesky, and more.

Check the security headers a public site sends: HSTS, CSP, framing, content type, referrer, and permissions, with the line to add for each gap.

Decode a JWT, read its expiry in plain words, and verify its signature locally with a public key or JWKS URL.

A free llms.txt validator for sites and documentation.

Shows how a link looks on X, LinkedIn, Slack, Discord, and iMessage, drawn from the page's own tags.

Turn one URL or text value into a downloadable QR code, locally and without a tracking redirect.

Trace every HTTP redirect hop, its status code, and the final URL.

Check a site's security.txt against RFC 9116: location, media type, redirects, format, Contact, Expires, Canonical, and signature, with the fix for each gap.

Check a site's sitemap: found through robots.txt, well formed, the URL count, same host, lastmod, and ten sampled pages with their status codes, with the fix for each gap.

Check whether a domain's apex and www hosts resolve and redirect to one canonical home.