Collapse whitespace and line breaks into one compact line.
JSON tools
JSON minifier — compress JSON online
Remove extra whitespace from JSON in your browser—no upload.
Pretty-printed JSON is easier to read but heavier to ship. When you need a single line for an API payload, a config file, or a log sample, minifying saves bytes without changing meaning.
Paste JSON on the left, click Minify, then copy the compact result from the right. Invalid JSON still fails loudly so you do not propagate bad data.
JSON minifier workspace
Smaller payload, same data—when readability is not the goal.
Input
Minified output
What you can do here
Smaller payload, same data—when readability is not the goal.
Parse checks happen before output—bad JSON returns an error, not garbage.
Copy the minified string for configs, tickets, or chat in one click.
Everything runs in your browser tab—nothing is sent to our servers to minify.
Nothing happens until you click Minify, so unfinished edits do not produce output by accident.
How to use it
Paste JSON into the left editor (from a file, API, or formatter).
Click Minify. The right panel shows a single-line JSON string.
Adjust the left side if needed, minify again, then use Copy when it matches what you need.
What to expect
Minifying uses your browser’s JSON parser and serializer. Very large documents can slow the tab. Number precision follows JavaScript—extreme integers may need special handling elsewhere.
Quick sample
Want to try it? Paste this into the left panel and click Minify:
{
"service": "my2ls",
"tool": "json-minifier",
"tips": ["paste", "minify", "copy"]
}Related pages
Quick question
Does my JSON get uploaded to your servers?
No. This minifier runs entirely in your browser. The text you paste is not sent to us to minify it.