How to format and validate JSON

The JSON Formatter cleans up, validates, and transforms JSON entirely in your browser — nothing is uploaded.

Steps

1. Paste your JSON into the left editor.
2. Pick an action:
   • Format — pretty-prints with 2-space indentation.
   • Minify — strips all whitespace into a single compact line.
   • Sort keys — recursively alphabetizes object keys (great for diffing).
3. Copy the result from the right panel.

Validation

If your JSON is invalid, you'll see a clear error message — and, when your browser provides it, the line and column of the problem. A valid document shows a summary with the total key count and nesting depth.

Tips

• Sorting keys produces a deterministic output, which makes comparing two JSON blobs much easier.
• Everything runs locally, so it's safe to paste sensitive payloads.