JSON Formatter & Validator

Validate, format or minify JSON directly in your browser. Your JSON content is not uploaded to the server.

Input JSON 0 bytes
Output 0 bytes
Ready
Paste JSON to begin

Processing happens locally in your browser. Input is limited to 2 MB.

Browser-localYour JSON content stays in the browser. Only anonymous usage metadata such as byte counts and processing time may be recorded.
Strict validationUses the browser's standards-compliant JSON parser, so trailing commas, comments and malformed strings are rejected.
Safe formattingFormat with 2 spaces, 4 spaces or tabs, optionally sorting object keys while preserving array order.

Format JSON

Turn compact or hard-to-read JSON into an indented structure that is easier to inspect, copy and debug.

Validate JSON

Check whether JSON is syntactically valid and get a useful parser error with line/column details when the browser provides them.

Minify JSON

Remove insignificant whitespace while keeping the parsed JSON data unchanged.

Text / Code Diff Checker Compare two text or code versions line by line locally in your browser with added, removed, and unchanged line highlighting. Base64 Encoder / Decoder Encode UTF-8 text to Base64 or decode Base64 back to text directly in your browser, including Base64URL support. URL Encoder / Decoder Encode or decode URL components, full URLs, and form/query values locally in your browser with Unicode-aware percent encoding.
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