API & Web Tools

Parse URLs and headers, look up status codes and convert cURL commands.

CSP Analyzer Breaks a CSP into directives, flags the parts that weaken it and names the ones that are missing.
cURL Converter Converts a curl command into fetch, Python requests or PowerShell, with the shell quoting handled properly.
HTTP Header Analyzer Explains a block of HTTP headers, checks cookie flags and lists the security headers that are absent.
HTTP Status Codes Looks up status codes by number or name and says what to do about each, not just what it is called.
MIME Type Lookup Maps file extensions to Content-Type values and back, with notes on the ones people get wrong.
Query String Parser Breaks a query string into parameters, or builds an encoded one, with repeated keys called out.
robots.txt Validator Checks a robots.txt line by line and tests a path against it using the real longest-match rule.
Sitemap Generator Turns a list of URLs into a valid sitemap.xml, resolving relative paths and catching duplicates.
URL Parser Breaks a URL into its parts with the browser’s own parser, so the answer matches what a browser would do.
User Agent Parser Parses user agent strings into browser, version and platform, and names the bots.
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