JSON Format & Validate
Format, compress, and validate JSON offline. Tree preview, key sort, and Unicode helpers included.
All processing on this page runs locally in your browser unless noted otherwise.
Drop a .json file here, or
Input
Result
Local offline processing — data is never uploaded
How to use
- Paste JSON or upload a .json file.
- Choose indent, optional key sort / Unicode options, then Format or Minify.
- Switch to tree view to expand nodes and copy values or JSONPath.
Example
{
"name": "JSON Workbox",
"offline": true,
"features": ["format", "validate", "tree"],
"meta": { "version": 1, "tags": ["json", "tools"] }
}FAQ
Is my JSON uploaded?
No. All parsing runs in your browser via Web Worker. Nothing is sent to a server.
What file size is supported?
Up to 2MB is smooth; 2–10MB shows a warning; over 10MB is blocked to protect the browser.