Will minifying break my data?

No. Only insignificant whitespace is removed; the parsed value is unchanged.

Does it compress the size further?

It removes whitespace only. For transfer size, rely on gzip at the HTTP layer.

Can I minify and then re-expand?

Yes, switch the indent back to 2 or 4 spaces at any time on the same input.

Is the JSON uploaded?

No, it never leaves the browser.

JSON minifier

Minifying strips the whitespace from JSON for smaller payloads. Choose Minify and the output collapses to one line, with no change to keys, values, or number precision.

It is ideal for trimming a config blob before you paste it into an environment variable or a request body, and it stays fully client-side.

Formatted JSON

Paste JSON and press Format

Formatting happens in this browser. Numbers are kept exactly as written.

How to use this tool

1Open the Format JSON tool.
2Paste your JSON.
3Choose Minify.
4Copy the compact result.

Frequently asked questions

Will minifying break my data?: No. Only insignificant whitespace is removed; the parsed value is unchanged.
Does it compress the size further?: It removes whitespace only. For transfer size, rely on gzip at the HTTP layer.
Can I minify and then re-expand?: Yes, switch the indent back to 2 or 4 spaces at any time on the same input.
Is the JSON uploaded?: No, it never leaves the browser.

Private by design

This tool runs entirely in your browser. Files, tables, and results are never uploaded to a server — you can even disconnect your network and keep working. See the Privacy Policy.