JSON Outils

Entrée JSONSortie JSON

Format, validate, minify, and escape JSON online

Use this free JSON formatter to prettify payloads, compress JSON for transport, validate syntax, and escape or unescape strings directly in your browser. No uploads, no account, and no server-side processing for your JSON content.

Common JSON tasks

Pretty-print API responses

Paste a minified API response to make nested objects, arrays, and fields readable during debugging.

Validate JSON before deployment

Check configuration files, request bodies, and fixtures for syntax errors before they break builds or integrations.

Minify or escape JSON for transport

Compress payloads for logs and URLs, or escape JSON strings before embedding them into source code or templates.

JSON formatter FAQ

Is this JSON tool private?: Yes. Formatting, validation, minifying, and escaping happen locally in your browser, so your JSON is not sent to a server by the tool itself.
What JSON operations does this page support?: You can format, minify, validate, escape, and unescape JSON from a single page, then copy the result for reuse.
Who is this JSON tool for?: It is useful for developers, QA engineers, analysts, and anyone who needs to inspect or clean JSON quickly during daily work.

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