JSON Minifier

What it does

Removes insignificant whitespace from JSON to make it as small as possible.

What it will not do

It strips whitespace only. It does not reformat numbers, reorder keys, or drop duplicate keys — the literals you pasted come out byte-for-byte, just without the spaces. So a 64-bit ID or a 1.0 stays exactly as written.

When to use it

Shrinking a payload to embed in a URL, a data attribute, or a fixture, or to compare two documents without whitespace noise.

Privacy

Local-only, in your browser. No upload; works offline.