How much smaller will my JSON get?

Typically 20 to 40 percent for indented JSON. The exact saving is shown in the status bar.

Can I turn minified JSON back into readable JSON?

Yes. Switch to Format, or use the JSON formatter page, to indent it again.

Is this the same as compressing with gzip?

No. Minifying only removes whitespace and the result is still JSON. Servers usually gzip on top of that when sending it.

JSON Minifier

Strip the spaces and line breaks out of JSON to make it as small as possible. The status bar shows how much smaller it got. The data itself stays exactly the same.

How to use the JSON minifier

Paste formatted JSON or drop a .json file on the editor.
The minified JSON appears on the right, on a single line.
Check the saving in the status bar.
Copy it, or download it as a .json file.

What you get

Every value and number exactly as written
Key order
Spaces inside strings, which are part of the data
Validation: invalid JSON is reported, not mangled

About the JSON minifier

When to minify

Minified JSON is smaller to send and store: request bodies, environment variables, embedded config and test fixtures. For reading and editing, use the formatter instead.

Safe minification

The JSON is parsed first, so only whitespace between tokens is removed. Text inside strings is never touched, and invalid JSON is reported instead of being half-minified.

Frequently asked questions

How much smaller will my JSON get?: Typically 20 to 40 percent for indented JSON. The exact saving is shown in the status bar.
Can I turn minified JSON back into readable JSON?: Yes. Switch to Format, or use the JSON formatter page, to indent it again.
Is this the same as compressing with gzip?: No. Minifying only removes whitespace and the result is still JSON. Servers usually gzip on top of that when sending it.