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JSON FormatterYAML FormatterBase64 / URL EncodeJWT DecoderRegex TesterUnix TimestampCron BuilderUUID / ULIDPunycode / IDNBase ConverterACL Generator
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2.63.a76559e

JSON Formatter and Validator

Paste JSON to format, minify, or validate it instantly. All processing happens in your browser - no data is transmitted.

Input
1
Output
1
Examples:

Related Tools

YAML Formatter

Paste YAML to format, validate, minify, or convert to and from JSON. All processing happens in your browser - no data is transmitted.

Regex Tester

Test regular expressions with real-time match highlighting, flag toggles, match details and replace mode. All processing runs in your browser.

JWT Decoder

Paste a JWT token to decode its header and payload claims. Runs entirely in your browser - the token is never sent to a server.

About this tool

JSON (JavaScript Object Notation) is a lightweight data interchange format defined in RFC 8259. This tool validates JSON using the browser built-in JSON.parse, then formats it with JSON.stringify with configurable indentation. All processing runs locally in your browser - no data is ever transmitted.

Common uses: prettifying API responses for debugging, compressing configuration files for deployment, validating JSON before sending it to an API, and converting minified JSON into a readable structure for inspection.