JSON Formatter
Beautify and validate JSON instantly. Free online JSON formatter with syntax highlighting, minify, and validation. No data leaves your browser.
About
JSON is the standard for API responses and config files. Raw JSON from APIs often arrives minified or poorly formatted-hard to read and debug. A JSON formatter beautifies and indents your data so you can inspect structure, spot errors, and understand nested objects quickly.
Formatting messy JSON improves readability. Indentation helps trace nested objects and arrays. Syntax highlighting makes keys, values, and types stand out. Validation catches trailing commas, missing quotes, and invalid structures before your code runs.
Use cases: debugging API responses, inspecting webhook payloads, cleaning up config files, preparing JSON for documentation. Paste your data, get formatted output in one click. No signup, no server round-trip-everything runs locally in your browser.
Example
Input
{"id":1,"name":"test","nested":{"key":"value"}}Output
{
"id": 1,
"name": "test",
"nested": {
"key": "value"
}
}Use cases
- Debug API responses and webhooks
- Format minified JSON for readability
- Validate JSON before committing
- Prepare config files for review