JSON Formatter
Format, validate, and minify JSON instantly — with clear error locations.
Formatted locally in your browser — nothing is sent to a server.
Input
14 lines232 charsValid
Output
7 keys14 lines232 charsValid
About this tool
Paste or upload JSON to pretty-print it with your choice of indentation, minify it down to a single line, or sort object keys alphabetically. Invalid JSON is reported with the exact line and column the browser’s own parser flags, so you can find the problem without scanning the whole document.
Frequently asked questions
- What does this tool actually check?
- It parses your input with the browser's own JSON.parse — the same strict parser used everywhere else in the ecosystem — so anything it accepts is valid JSON, and any error message and line/column position come directly from the parser, not a re-implementation.
- Is my JSON sent to your servers?
- No. Formatting, validation, and minifying all happen in your browser. Nothing you paste, upload, or generate here is sent to WebCodeIn's servers, logged, or stored.
- Does sorting keys change what my JSON means?
- No — object keys are unordered by the JSON specification, so alphabetically sorting them doesn't change the data. Array order is never touched, since arrays are ordered by definition.
- Can I format JSON that isn't an object, like a bare array or number?
- Yes — any valid JSON document is accepted, including a top-level array, string, number, boolean, or null.
Privacy
Every parse, format, and minify operation runs in your browser using the native JSON parser. No configuration, request, or generated value is sent to WebCodeIn’s servers, logged, or stored.
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