Verified no-login tool
Three steps: paste, check, copy.
Paste your JSON into the tool, or type directly into it.
The result updates live — valid JSON is formatted, errors are explained.
Pick your indentation, or hit Minify to strip all whitespace.
Copy the result back into your editor or config.
Built for speed, privacy and reliability — on any device.
Syntax errors are caught as you type, with the exact message from the parser.
Format with 2 spaces, 4 spaces or tabs — or minify for production payloads.
Formatting runs locally — your JSON never reaches a server.
From tiny config snippets to large API responses, everything is processed instantly.
No account, no limits, no watermarks.
No. Formatting and validation run entirely in your browser — your data never leaves your device.
It shows the parser's exact error message so you can spot the missing bracket or stray comma quickly.
Yes — typical API responses and config files format instantly. Extremely large payloads depend on your device's memory.
No — minifying only strips whitespace. Keys, values and ordering stay exactly the same.
2 spaces is the most common convention; 4 spaces matches some older style guides, and tabs match your editor's setting.
Format, validate and minify JSON instantly