JSON
Free Online JSON Formatter & Validator
Fast browser-based JSON formatter and validator with precise syntax errors. Your JSON never leaves this device.
100% Client-Side. Your data is processed locally and is never sent to an ElDevo processing server.
Input
Output
Ctrl/Cmd + Enter to run · Esc to clear · Processing stays in your browser.
Advertisement
How to Use
- 1Paste JSON or load a .json file.
- 2Choose 2 or 4 spaces, or minify the result.
- 3Fix any highlighted line and column error.
- 4Copy or download the formatted JSON.
Features & Privacy Guarantee
- ✓ Native JSON.parse validation
- ✓ 2 or 4 space indentation
- ✓ Minify and copy output
- ✓ Upload and download .json files
Search intent: Format, validate and minify JSON instantly in your browser.
Technical Example
Input
{"name":"ElDevo","private":true}Output
{
"name": "ElDevo",
"private": true
}Frequently Asked Questions
Is this JSON formatter private?
Yes. Parsing and formatting happen in your browser. No JSON payload is uploaded to ElDevo.
Can I minify JSON?
Yes. Use Minify to remove insignificant whitespace while preserving the JSON structure.
Does it show JSON syntax errors?
Yes. The parser error is displayed with a best-effort line and column location.
Can I format a JSON file?
Yes. Use Upload File to load a local .json file, then download the formatted result.