Input
1
Ln 1 Col 1
Indent
Output
// output appears here
—

Jsonic's JSON Minifier removes all unnecessary whitespace — spaces, tabs, and newlines — from your JSON, producing the most compact valid representation. Paste your formatted JSON and click Minify. The output is a single-line JSON string ready to embed in HTTP request bodies, config files, or source code. The minifier validates your JSON first, so the output is always well-formed. All processing runs in your browser.

How to minify JSON online

  1. Paste your JSON into the left panel.
  2. Click Minify.
  3. The right panel shows the compressed single-line JSON.
  4. Click Copy or Download to save the result.

FAQ

What does minifying JSON do?

Minifying removes all whitespace characters (spaces, tabs, newlines) that are not inside string values, producing the smallest valid JSON representation.

How much does minification reduce file size?

Typical well-formatted JSON shrinks by 20–40% after minification. Heavily indented files with short values can shrink more. The actual reduction depends on how much whitespace the original contains.

Does minification lose any data?

No. Minification only removes insignificant whitespace. All keys, values, and structure are preserved exactly.

When should I minify JSON?

Minify JSON for production API responses, embedded JSON in HTML or JavaScript source, and anywhere bandwidth or file size matters. Keep formatted JSON for config files and during development.

Is minified JSON valid JSON?

Yes. Minified JSON is fully valid JSON. Any JSON parser will process it correctly.

Is my JSON sent to a server?

No. Minification runs entirely in your browser using JavaScript. Your data never leaves your device.