JSON Minifier Online — Compress & Minify JSON
A JSON minifier removes whitespace and line breaks to shrink your JSON to the smallest valid size. Paste your JSON and click Minify to compact it instantly, then copy or download — and reverse it any time with Format.
How to use JSON Minifier
- Paste your JSON into the editor, or upload / drag-and-drop a
.jsonfile. - Use the toolbar to Format, Minify, or Fix your JSON.
- Switch to Tree, Graph, or Table to explore the structure.
- Filter values with a JSONPath query when you need a specific part.
- Click Copy or Download to save the result.
Features
Beautify & minify
One-click pretty-print or compact your JSON to a single line.
Validate & auto-fix
Catch syntax errors instantly and repair common mistakes automatically.
Tree, graph & table views
Explore nested JSON visually and edit it inline.
Transform tools
Stringify, unescape, parse nested JSON, and sort keys.
JSONPath filter
Query and extract exactly the values you need.
100% private
Everything runs in your browser — nothing is uploaded.
What is JSON Minifier?
Minifying JSON reduces file size and speeds up transfer by removing every unnecessary space and newline while keeping the data identical. It's commonly used before sending JSON over the network or embedding it in code. JSON Reader minifies in one click and lets you switch back to a formatted, readable version whenever you need to inspect the data.
Related JSON tools
Frequently Asked Questions
Everything you need to know about JSON Reader