JSON Formatter
Format, minify, and validate JSON instantly. Paste your JSON, choose Beautify or Minify, and copy the result. Invalid JSON shows line and column hints. Your data never leaves your device.
- Last reviewed:
- What we verified
- Uses JSON.parse / JSON.stringify per ECMAScript.
- Source
- IETF RFCs and ECMAScript JSON semantics where applicable.
- Official references
- Disclaimer
- Outputs follow published specs (RFCs, JSON standard, etc.). Always validate security-sensitive tokens and payloads in trusted environments.
Examples
- {"user":{"id":1,"roles":["admin","editor"]}} → pretty-printed with indentation
- Minify removes whitespace for production payloads
Wrong result? Report an issue · Methodology
How to Use
- Paste JSON into the input area (or load the sample).
- Click Beautify for readable formatting or Minify for a single line.
- Fix any syntax errors shown with line/column hints.
- Copy the output to your clipboard.
Frequently Asked Questions
Is my JSON sent to a server?
No. Parsing and formatting happen entirely in your browser.
Why do I see a position error?
JSON.parse reports the character position of syntax errors. We translate that to a line and column to help you find the mistake quickly.
Guides & worked examples
Start with examples →JSON Formatter Examples
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