Developer tools
JSON, cron, encoding and network debugging
JSON Formatter & Validator
Format, minify and validate JSON, compare two payloads path by path, and escape or unescape JSON strings.
Cron Expression Parser
Parse crontab expressions into a plain-language schedule and the next 5 run times.
Base64 Encoder & Decoder
Encode text to Base64 or decode it back to UTF-8, with an optional URL-safe alphabet. Everything runs locally.
URL Encoder & Decoder
Percent-encode or decode URLs and query values, with component, full-URL and form modes.
HTML Entity Escaper
Escape <, >, & and quotes into HTML entities, or turn entities back into readable text.
JWT Decoder
Decode a JWT header and payload, inspect claims and expiry time. Signatures are not verified.
Unicode Converter
Convert non-ASCII characters such as Chinese and emoji to \u escapes, U+ code points or HTML entities, and back.
Number Base Converter
Convert integers between binary, octal, decimal and hexadecimal, with BigInt precision and 0b/0o/0x prefixes.
Password Generator
Generate strong random passwords locally with adjustable length, character sets and ambiguous-character filtering.
UUID Generator
Generate RFC 4122 UUID v4 values in bulk, with options for count, uppercase and hyphen-free formatting.
Lorem Ipsum Generator
Generate Latin placeholder text with adjustable paragraphs and sentences, as plain text or HTML.
QR Code Generator
Turn a URL, text or any content into a QR code, adjust size and error correction, and download a PNG.
URL Parser
Break a URL into protocol, host, port, path, query parameters and hash, with automatic path decoding.
HTTP Status Codes
Look up common HTTP status codes and what they mean, with filters by number, name or class.