Free Online JSON Formatter & Validator
Format, validate, and beautify JSON data online. Syntax highlighting, error detection, and minification. Free developer tool, no data sent to servers.
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How to Use
STEP 1
Upload File
Drag and drop or click to select your file
STEP 2
Process
Adjust settings and click process
STEP 3
Download
Download your processed file instantly
Why BrowserTool?
No Upload Required
Your files are processed 100% in your browser. Nothing is ever uploaded to any server.
100% Free
All tools are completely free to use with no registration, limits, or watermarks.
Lightning Fast
Processing happens locally on your device, so there's no waiting for server responses.
Frequently Asked Questions
What does the JSON formatter do?
It takes raw JSON data and formats it with proper indentation and line breaks, making it easy to read. It also validates the JSON and highlights any syntax errors.
Can it minify JSON?
Yes! Toggle the minify option to compress your JSON by removing all whitespace. This is useful for reducing payload sizes.
How are errors shown?
If your JSON is invalid, the tool highlights the error location and shows a descriptive error message to help you fix the issue.
Is my data safe?
Completely. All formatting and validation happens in your browser. No data is ever sent to our servers or any third party.
What's the maximum JSON size?
The tool can handle JSON files up to several megabytes. Performance depends on your browser and device capabilities.