JSON Formatter & Validator
Format, validate and minify JSON locally in your browser with clear syntax errors and copy controls.
Your JSON is processed entirely in this browser tab and is not uploaded to any server.
Indent:
INPUT JSON
OUTPUT
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How the JSON Formatter works
The JSON Formatter parses the supplied input as JSON and serialises the result using the selected indentation (2 or 4 spaces). Invalid input remains visible while the syntax error message pinpoints the parsing problem.
How to use it
- Paste your JSON payload into the input text editor.
- Select your desired indentation or format option.
- Use the copy, minify, or download buttons to save the processed JSON result.
Examples
Format a compact object
In: {"name":"ShadTools","active":true}
Out: {
"name": "ShadTools",
"active": true
}
Frequently Asked Questions
Is my JSON payload safe? +
Yes. All JSON formatting happens 100% locally in your browser memory. Data is never uploaded to any remote server.