← ToolsFormatters
JSON formatter.
Pretty-print, minify and validate JSON with exact error pointers. Pasted text never leaves this tab.
{
"local": true,
"name": "jaskaran",
"stack": [
"next.js",
"tailwind"
],
"tools": 16
}Drop a .json file to format it
or — max 5 MB · stays on device
🔒 Privacy — runs 100% locally
No uploads · no cookies · works offline after load. View Source if you don't believe it.
How to use.
- Paste JSON on the left — output updates as the toolbar mode changes.
- Pick Pretty or Minify, toggle Sort keys, then Copy or Download.
- Red error box? Read the position pointer — that's the exact broken byte.
Related tools.
Converters
JSON to TypeScript
Infer TypeScript interfaces from JSON, with optional Zod schemas. Interface or type-alias output.
Encoders
Base64 encode
Encode and decode text or files with UTF-8 support and URL-safe mode. Auto-updates as you type.
Text & CSS
Regex tester
Live JavaScript regex matching with flags, capture-group tables and a cheatsheet. Input-capped for safety.
FAQ.
Is there a size limit?
Browser memory is the only limit — multi-MB documents format fine. Sorting keys on huge files may take a moment.
Does it preserve key order?
Yes, unless you enable Sort keys. Number precision follows JSON.parse (64-bit floats).