Developer tools that just open and work
Format JSON, convert CSV, decode a JWT. No signup, no upload, no file size limits — every tool runs locally in your browser.
JSON
Convert
⇥JSON to CSV→Flatten nested JSON into spreadsheet-ready CSV.⇤CSV to JSON→Turn CSV rows into an array of JSON objects.⇄YAML to JSON→Convert a YAML config into JSON.⇆JSON to YAML→Turn JSON into readable YAML.⟨⟩XML to JSON→Parse XML into JSON, attributes included.⟩⟨JSON to XML→Build well-formed XML from a JSON document.TSJSON to TypeScript→Generate TypeScript interfaces from a payload.⏱Timestamp Converter→Read a Unix epoch as a date, and back.◐Color Converter→HEX, RGB and HSL, with a live swatch.
Compare
Encode
64Base64 Encode→Encode text to Base64, UTF-8 and URL-safe.46Base64 Decode→Read a Base64 string back as text.%URL Encode→Percent-encode text for query strings and paths.↩URL Decode→Turn percent-escapes back into readable text.⚿JWT Decoder→Inspect header, payload and expiry of a JWT.&HTML Entity Encode→Escape text so it is safe inside HTML.&#HTML Entity Decode→Turn & and © back into characters.