Is my JSON data uploaded?

No. All formatting happens locally in your browser. Data is never uploaded.

Can this validate JSON?

Yes. The tool checks for syntax errors and highlights invalid JSON.

Yes. You can format or minify JSON for compact output.

Does this work offline?

Yes. Once loaded, the JSON formatter works fully offline.

JSON Formatter Online

Format, validate, and clean JSON data for better readability and faster debugging. Works fully in your browser with no uploads, no accounts, and no tracking. Your data stays on your device.

JSON Formatter

Paste your JSON below to format, validate, and clean it.

Output

Waiting for JSON...

Why Use This JSON Formatter?

A fast, privacy-first JSON tool designed for developers, students, and API debugging.

🔒

100% Private

All formatting runs locally. No data is sent anywhere.

⚡

Instant Formatting

Format large JSON in milliseconds.

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Clean Output

Pretty-print and minify with one click.

🖥️

Works Everywhere

Works on desktop, tablet, and mobile with no installation.

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Error Detection

Instantly detect invalid JSON.

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Completely Free

No signup, no limits, free forever.

JSON Formatter – FAQs

Is this JSON Formatter safe to use?

Yes. All JSON formatting runs locally in your browser. Your data is never uploaded.

Can it detect invalid JSON?

Yes. The tool highlights errors if your JSON is invalid.

Can I minify JSON?

Yes. You can both prettify and minify JSON instantly.

Does formatting change my data?

No. Only spacing and formatting are changed, the actual data remains the same.

Is there any size limit?

There is no fixed limit. It depends on your browser and device memory.

Can I copy formatted JSON?

Yes. You can copy the formatted or minified output with one click.

Is this JSON Formatter free to use?

Yes. It is completely free with no signup, no tracking, and no limits.