JSON
A JSON formatter for quick checks
Validate syntax and make nested data readable before you paste it into a ticket or terminal.
Read the JSON guide →DEVELOPER TOOLBOX · BROWSER TOOLS
Small developer tools that stay out of your way.
Format JSON, generate UUIDs, and encode URL components without installing a package or uploading your input.
Runs in your browser
No account required
Copy-ready output
JSON
Format and validate JSON
Turn compact or hard-to-read JSON into a formatted document. Invalid input stays in your browser and is only used to show the error.
UUID
Generate random UUIDs
Create version 4 UUIDs for local development, test fixtures, or sample data. Values are generated on your device.
URL
Encode or decode URL components
Convert spaces, symbols, and non-ASCII characters to URL-safe text, or decode an encoded component back to readable text.
UUID
Generate IDs for test data
Create one or a small batch of UUIDs without a library or account.
Read the UUID guide →URL
Encode query values safely
Encode a query value or decode a copied component when debugging links and callbacks.
Read the URL guide →