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✦ json formatter · 120K/mo{} JSON Developer Tools
Pretty-print messy API output, validate syntax, and convert JSON to CSV, YAML, Excel and more — all client-side.
JSON Formatter / Beautifier
Pretty-prints messy JSON with 2 or 4-space indent and a tree view.
Solves: Minified API output is unreadable and impossible to debug.
JSON Validator
Checks syntax and points to the exact line and column of the error.
Solves: One missing comma breaks an app; finding it by eye wastes hours.
JSON Minifier
Removes all whitespace to shrink JSON to one line.
Solves: Large payloads slow APIs and cost bandwidth.
JSON to CSV Converter
Turns JSON arrays into spreadsheet rows you can download.
Solves: Non-developers cannot read JSON but need the data in Excel.
JSON to YAML Converter
Converts JSON into YAML format.
Solves: Config files and older systems demand a different format.
JSON to Excel Converter
Turns JSON into a CSV file that opens directly in Excel.
Solves: Teams need API data in a spreadsheet, not raw JSON.
JSON to TypeScript
Generates TypeScript interfaces from a JSON sample.
Solves: Writing data models by hand from API samples is slow and error-prone.
Base64 Encoder / Decoder
Encodes text to Base64 and decodes it back.
Solves: APIs, emails and data URLs require Base64; manual coding is tedious.
JWT Decoder
Shows the header and payload inside a JSON Web Token.
Solves: Developers cannot see why a login token is expired or invalid.
Regex Tester
Tests a pattern against sample text with live match highlighting.
Solves: A wrong regex silently matches the wrong data in production.
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