JSON FormatterNothing uploadedNo sign-upNo watermark

Free Online JSON Formatter

Pretty-print, minify and validate JSON in your browser. Errors point at the exact line, and nothing is sent anywhere.

JSON in

Formatted

The result appears here

Format And Beautify JSON Instantly

API payloads and config files often carry keys and personal data. This one parses in your own browser, so what you paste stays on your machine.

Nothing Leaves The PageYour text is transformed in the browser. No request is made and nothing is stored.

Format Or MinifyPretty-print with 2, 4 or tab indentation, or strip it all back down to one line.

Errors You Can FindInvalid JSON reports the line and column, not just “unexpected token”.

Validation IncludedIf it formats, it parses — the tool is a validator by construction.

InstantRuns as you type — no button to press and no waiting on a server.

Works OfflinePure JavaScript with no dependencies, so it keeps working with no connection.

What is a JSON formatter?

A JSON formatter is a tool that converts unformatted JSON data into a structured and readable format.

How can I format JSON online?

Paste JSON data into a JSON formatter tool to beautify and organize the structure.

Is ModifyX JSON Formatter free?

Yes, ModifyX provides a free browser-based JSON formatting tool.