Free developer tools
Format JSON, decode a JWT, explain a cron line, or compare two texts. All 16 tools run in the browser.
Data
Format, minify, and convert structured text.
- JSON Formatter — Pretty-print and validate JSON.
- JSON Minifier — Remove insignificant whitespace from JSON.
- CSV to JSON — Turn a CSV table into JSON objects.
- JSON to CSV — Turn an array of objects into CSV.
- YAML / JSON — Convert between YAML and JSON.
Encode
Encode, decode, and checksum text in the browser.
- Base64 — Encode and decode UTF-8 text as Base64.
- URL Encoder — Percent-encode and decode URL text.
- HTML Entities — Escape and unescape HTML text.
- JWT Decoder — Decode a JWT header and payload locally.
- Hash Generator — SHA-256, SHA-384, and SHA-512 checksums.
Identifiers
Generate random identifiers.
- UUID Generator — Generate version 4 UUIDs.
Time
Convert timestamps and explain cron schedules.
- Unix Timestamp — Convert Unix time and calendar dates.
- Cron Helper — Explain a five-field cron expression.
Text
Test expressions and compare text.
- Regex Tester — Try a JavaScript regular expression with a time limit.
- Diff Checker — Compare two text blocks line by line.
Color
Convert colors between hex, RGB, and HSL.
- Color Converter — Convert hex, RGB, and HSL.