🧾 JSON Formatter & Validator
Beautify, minify, and validate JSON. Everything runs locally in your browser.
Indent:
{
"name": "ConfigManual",
"tags": [
"linux",
"networking"
],
"active": true
}What this tool does
Paste any JSON and this tool instantly validates it, beautifies it with clean indentation, or minifies it to a single line. If the JSON is malformed, you get the exact error message so you can find the problem fast. Everything happens in your browser — your data is never sent to a server.
Common uses
- Debugging API responses — make a wall of minified JSON readable.
- Validating config files — catch a missing comma or bracket before it breaks a deploy.
- Minifying for production — strip whitespace to shrink payloads.
Quick JSON tips
- Keys and strings must use double quotes, never single quotes.
- No trailing commas after the last element.
- Allowed value types: string, number, boolean, null, object, array.
Working with APIs? You might also like our Base64 & hash toolkit.