Is my JSON sent to a server?
No! All validation and formatting executes entirely in your browser using native JavaScript JSON parsers.
How to Use JSON Formatter & Validator
Step 1: Paste JSON
Paste raw JSON string or upload a .json file.
Step 2: Choose Action
Format (2-space / 4-space / tab), Minify, or Auto-Fix trailing commas.
Step 3: Copy or Download
Copy your formatted payload or save as a .json file.
Key Features & Capabilities
- Syntax validation with line & column error markers
- Format with 2-spaces, 4-spaces, or tabs
- Minify JSON in one click
- Safe client-side execution ensures confidential data never leaks
Specifications & Limits
- Supported Formats: .json, .txt
- Max File Size: 10 MB
- Batch Processing: Single Item
- Free Tier Limit: Unlimited JSON payloads
Frequently Asked Questions
How does the validator indicate syntax errors?
Syntax errors display exact line numbers, column positions, and descriptive parser error messages.
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