Text & Code
JSON Formatter & Validator
Paste messy or minified JSON and instantly pretty-print it with the indentation you prefer, or minify it back down for production. Invalid JSON is flagged with a clear error message so you can fix it fast. Everything runs locally — your data is never sent anywhere.
- Runs in your browser
- No uploads, instant
- Free, no sign-up
Highlights
- Beautify with 2 / 4 / tab indentation
- Minify to a single line
- Clear validation errors
- One-click copy of the result
How to use it
How to use the JSON Formatter & Validator
- Step 1
Paste JSON
Drop your JSON into the input area.
- Step 2
Choose an action
Beautify with your indent, or minify it.
- Step 3
Check validity
Errors are highlighted with a message.
- Step 4
Copy
Copy the cleaned-up JSON to your clipboard.
FAQ
Frequently asked questions
Is my JSON sent to a server?
No. Parsing and formatting happen entirely in your browser, so you can safely paste configuration, API responses or other sensitive data.
What does minify do?
Minifying strips all whitespace and line breaks to produce the smallest valid JSON, which is ideal for embedding in code or shrinking API payloads.
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