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

Validate JSON and find errors

Compress JSON

Collapsible tree view

Generate TypeScript/Go/Java types

Convert YAML to JSON

Convert XML to JSON

Format and beautify XML

Encode or decode Base64

Encode or decode URLs

Generate random UUIDs

Run Go code instantly. No signup required.

Convert CSV to JSON

Convert JSON to CSV

Compare two JSONs

Decode JWT tokens

Generate MD5, SHA hashes

Instant Python execution + Full libraries. No signup required.

Optimized for mobile. Sub-second load times.

All processing happens locally. Zero data collection.

Works perfectly on phones and tablets.