Fast, Private JSON Tools
Everything runs in your browser. Your data never leaves your device.
No servers. No tracking. No BS.
JSON Formatter
Format and beautify JSON
JSON Validator
Validate JSON and find errors
JSON Minifier
Compress JSON
JSON Tree Viewer
Collapsible tree view
YAML to JSON
Convert YAML to JSON
XML to JSON
Convert XML to JSON
Base64 Encode/Decode
Encode or decode Base64
URL Encode/Decode
Encode or decode URLs
UUID Generator
Generate random UUIDs
Why JSONLab?
⚡ Lightning Fast
Optimized for mobile. Sub-second load times.
🔒 100% Private
All processing happens locally. Zero data collection.
📱 Mobile First
Works perfectly on phones and tablets.