Web & Network
Web & Network — 10 free browser-based developer tools including HTTP Status Code Reference, HTTP Header Parser and User Agent Parser. Everything runs locally with no signup or uploads, so your data stays private and results are instant.
10 tools
HTTP Status Code ReferenceFree online reference to search every HTTP status code from 1xx to 5xx, including 200 OK, 404 Not Found, and 500, with the meaning, usage, and RFC source for each code at a glance
HTTP Header ParserFree online tool that parses raw HTTP request and response headers into key-value pairs, then analyzes security and caching headers like Cache-Control, CSP, and HSTS and explains them
User Agent ParserFree online tool to parse User-Agent strings and identify the browser, operating system, and device type. Paste any UA string; it is analyzed in your browser and the static data engine also works offline and on mobile.
MIME Type LookupFree online MIME type lookup that finds the right MIME type from a file extension or reverse-searches extensions by type for Content-Type headers and uploads.
URL ParserFree online tool to parse URLs into components like protocol, host, port, path, query, and hash, and analyze query parameters. It auto-adds https:// when missing and uses the browser URL API for encoding.
OG Tag PreviewFree online tool to preview Open Graph meta tags and see how your link appears on Facebook, X, and messengers, checking og:title, og:image, and og:description.
Robots.txt GeneratorFree online robots.txt generator with a visual editor that builds crawler rules by defining user-agent, allow and disallow paths, crawl-delay and sitemap location, producing a valid robots.txt file ready to copy for your website.
Sitemap XML GeneratorFree online sitemap.xml generator that turns a list of page URLs into a valid XML sitemap with optional lastmod, changefreq and priority fields, ready to copy and submit to Google Search Console and other search engines.
Htaccess Redirect GeneratorFree online .htaccess generator that builds Apache redirect rules for you. Add 301 or 302 redirects, www and HTTPS rules and custom paths, then copy ready .htaccess RewriteRule code.
CSP Header GeneratorFree online Content-Security-Policy header generator with a visual editor for directives like default-src and script-src, building a ready-to-deploy CSP string to harden your site against XSS attacks.