Developer Tools

Explain HTTP status codes, review behavior and SEO implications, browse a practical reference table, or inspect a live URL response path from one tool.

Convert colors between HEX, RGB, HSL, HSV and CMYK, check WCAG contrast, build palettes, save colors locally and copy CSS design tokens.

Format XML, validate parsing, inspect namespaces, attributes, element paths, duplicate IDs and profile checks for sitemaps, feeds, SOAP, SVG and config files.

Validate practical YAML locally, review indentation, duplicate keys, lists, anchors, aliases, profile checks, JSON preview, path explorer and configuration lint guidance.

Build cron expressions, preview next run times, expand fields, compare five-field and six-field syntax, and review scheduler timezone pitfalls.

Convert IPv4 and IPv6 values between dotted, integer, hexadecimal, binary, expanded, compressed, mapped and reverse DNS hint formats.

Developer Tools: Formatters, Encoders, Generators and Debugging UtilitiesDeveloper utilities for JSON, XML, YAML, Base64, URLs, JWT, UUID, hashes, timestamps, cron, regex and colors.JSON FormatterValidate, beautify, minify and inspect JSON.YAML ValidatorCommon...

Test regular expressions locally, inspect matches and named groups, preview replacements, save patterns, copy snippets and review regex safety notes.

Decode JWTs locally, inspect header and payload, review exp, nbf, iat, issuer, audience, signature risk and verification steps before trusting a token.

Convert Unix seconds, milliseconds, microseconds, nanoseconds and date strings into ISO, UTC, local time, timezone views and batch CSV.