Developer utilities

Validate, format, minify, sort keys, query with JSONPath and convert to or from YAML, TOML and CSV.

Base64, URL encoding and parsing, hex, HTML entities, Punycode and quoted-printable.

MD5, SHA-1, SHA-2, SHA-3, BLAKE, CRC32 and NTLM over text and files, plus HMAC.

Decode header, payload and claims with expiry explained; verify with a pasted key or JWKS URL.

Unix seconds and milliseconds, ISO 8601, RFC 2822 and relative time, always with an explicit timezone.

UUID v1, v4, v5 and v7, ULID and nanoid, in bulk; decode the timestamps inside v1 and v7.

Passwords and diceware passphrases from crypto.getRandomValues, with strength estimates and WPA PSK derivation.

Match highlighting, groups, replace and flags, run in a worker with a timeout.

Parse a cron expression to English, list the next runs in a chosen timezone, or build one.

Text and JSON diff, side by side or unified, with whitespace ignored on request.

Generate QR codes for text, Wi-Fi and vCards, and scan one from your camera or an image.

Binary, octal, decimal and hex, IP address to integer and back, and dotted-decimal masks.

File permission calculator, symbolic and octal.

Format, validate and convert YAML.

Format, validate and convert XML.

Format, validate and convert CSV.

Preview Markdown and export the HTML.

HEX, RGB, HSL and OKLCH conversion with a contrast checker.

DNS record types, HTTP status codes, common ports, MIME types, ASCII, subnet cheat sheet and special-use ranges.