Developer
JSON, base64, regex, JWT, diff, UUID.
JSON Formatter
Beautify, validate & minify JSON — instant, in your browser.
Base64 Encode / Decode
Encode or decode Base64 — instant, UTF-8 safe, in your browser.
Hash Generator
MD5, SHA-1, SHA-256 & SHA-512 hashes — instant, in your browser.
JWT Decoder
Decode header, payload & claims — live expiry countdown, readable dates, HS256 verify. Nothing sent.
Regex Tester
Live match highlighting, capture groups, replace preview and per-line testing. Nothing leaves your browser.
Diff Checker
Spot every change between two texts — word-level highlights, side-by-side or inline, ignore whitespace or case.
Cron Parser
Turn a cron expression into plain English plus the next run times, with a field breakdown and presets.
URL Encode / Decode
Percent-encode or decode URLs and query strings — full-URL or component mode, with a live parameter breakdown.
HTML Encode / Decode
Escape text to HTML entities or decode them back — special characters only, or every non-ASCII character.
Color Converter
Convert between HEX, RGB and HSL — every format at once, with a live preview. Paste any color or pick one.
Number Base Converter
Convert between binary, octal, decimal and hex — and any base from 2 to 36. Type in one, the rest update live.
JSON to CSV
Turn a JSON array into CSV and download it — automatic columns, nested-key flattening, pick your delimiter.
CSV to JSON
Turn CSV into clean JSON — auto-detected delimiter, header row as keys, numbers and booleans typed for you.