Private JSON Formatter

JSON Formatter Online

Beautify messy JSON into readable, indented output directly in your browser. JSON Toolkit helps you format, validate, inspect, copy, and export JSON without sending pasted data to a server.

Format JSONValidate JSONNo upload

What this formatter helps with

Readable JSON

Turn compact or messy JSON into clean indentation so objects, arrays, keys, and values are easier to review.

Clear validation

Catch broken JSON before using it in an API request, config file, documentation page, or support ticket.

Copy or export

Copy formatted JSON or export table-friendly records when your JSON contains structured arrays.

How to format JSON

Paste JSON

Paste your JSON into the input editor or load JSON from a URL.

Choose spacing

Select 2 spaces, 4 spaces, or another indentation style, then press Format.

Review output

Use Text, Tree, or Table view to inspect the result before copying or downloading.

Private by design

JSON Toolkit runs formatting in your browser. Your pasted JSON stays on your device and is not uploaded, stored, or sent to JSON Toolkit servers.

Ready to format JSON?

Open the formatter and paste JSON into the input editor.

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