{ } JSON Formatter
Format, minify and validate JSON with custom indent and key sorting
✓ Runs entirely in your browser — your data never leaves this device
About This Tool
Format, validate, minify and sort-key JSON with custom indentation. The go-to tool for API debugging, inspecting responses and fixing config files.
How to Use
- Paste your JSON string
- Choose indent, optionally sort keys, click Format or Minify
- The result appears below; syntax errors show the reason
FAQ
It reports a syntax error — why?
Usual culprits: trailing commas, CJK quotes, unquoted keys and comments (standard JSON has none).
Does key sorting change data?
No. It only reorders object keys for display; values stay untouched.
Size limit?
JSON up to ~10 MB is usually processed smoothly.