73 chars · 73 bytes
0 chars · 0 bytes
Why JSON Toolkit?
Use it as a quick JSON validator when an API response looks suspicious, a JSON formatter to make diffs readable, or a JSON minifierto shrink payloads for tests and fixtures.
- Client-side — your JSON stays in your browser.
- Helpful errors — line/column hints for quick fixes.
- Copy-ready output — formatted or minified in one click.
- No signup — open the page and paste JSON.
FAQ
Is this a JSON formatter or validator?
Both. Paste JSON in the input box and use Validate to check correctness, Format to pretty-print, or Minify to remove whitespace.
Does my JSON get uploaded anywhere?
No. JSON Toolkit runs client-side in your browser. Your input stays on your device.
Why does JSON validation fail when it looks valid?
Common issues are trailing commas, unquoted keys, single quotes, or comments. JSON Toolkit will show an error with an approximate line and column.
What is the difference between JSON minifier and formatter?
A formatter (pretty printer) adds indentation and line breaks for readability. A minifier removes unnecessary whitespace to reduce size.