JSON Formatter
Format, validate, minify and analyze JSON with syntax highlighting. Paste API responses, config files, or any JSON safely — nothing is ever uploaded.
100% Local · Safe for API Keys & Secrets
Input JSON
Output
Formatted output will appear here...
Other Free Tools
Password Generator
Cryptographically secure passwords generated locally in your browser.
Base64 Encoder
Encode and decode Base64 strings and files instantly.
QR Code Generator
Generate QR codes for URLs, text, Wi-Fi and more. Download as PNG.
Image Compressor
Compress JPEG, PNG and WebP images without uploading them.
EXIF Remover
Strip GPS coordinates and hidden metadata from photos before sharing.
Hash Generator
Generate SHA-256, SHA-512, SHA-1 hashes from text or any file.
URL Encoder
Encode and decode URLs and query parameters. Real-time results.
Diff Checker
Compare two texts side by side and see exactly what changed.
Image Converter
Convert images between PNG, JPEG, WebP and BMP formats with optional resize.
Color Picker
Pick colors and convert between HEX, RGB, HSL. Build palettes and gradients.
SVG Optimizer
Remove metadata and minify SVG files for faster web delivery.
Frequently Asked Questions
Yes — completely safe. All JSON processing happens locally using JavaScript's native JSON.parse and JSON.stringify. Your data never leaves your machine and is never stored.
Format adds indentation and line breaks to make JSON human-readable. Minify removes all whitespace for the smallest possible JSON string.
It checks for strict JSON syntax compliance: proper key quoting, no trailing commas, correct bracket matching, and valid value types.
Common causes include single quotes instead of double quotes, trailing commas after the last element, JavaScript-style comments, or missing closing brackets.
No hard limit — it depends on your browser's memory. JSON files up to 50MB format without issue in modern browsers.