JSON Formatter
Format, minify, and validate JSON. Syntax highlighting, error detection, copy and download options.
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How It Works
JSON Formatter & Validator
Output
Features
Format / Pretty Print
Formats JSON with proper indentation and line breaks for readability.
Minify
Removes all whitespace to create compact single-line JSON.
Validate
Shows detailed error messages with line/column numbers for invalid JSON.
Download
Download formatted JSON as a .json file.
All processing happens locally in your browser. Your JSON data is never sent to any server.
How to Use
- Select or drag and drop your file(s) into the upload area
- Adjust settings if available (quality, dimensions, etc.)
- Click the process/convert button
- Download the result
Features
- Completely free - no registration required
- Processed locally in your browser - files never uploaded
- Works offline once loaded
- Supports multiple file formats
- Fast processing with no server delays
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Frequently Asked Questions
Is there a size limit?
Large JSON (10MB+) may cause browser slowdown. For huge files, use desktop tools.
Does it validate JSON?
Yes, it shows detailed error messages for invalid JSON.