Choose a tool
Developer tools
Inspect networks, generate passwords and transform text. Local utilities explain when data stays in your browser.
- JSON Beautifier
Format, validate and inspect JSON locally in your browser.
- DNS Checker
Compare DNS answers from worldwide public resolvers on an interactive map.
- IP Subnet Calculator
Find IPv4 and IPv6 networks, address ranges and CIDR sizes.
- Password Generator
Generate strong random passwords locally, with your choice of characters.
- Bandwidth Calculator
Estimate file transfer time with decimal and binary data units.
- Base64 Encode / Decode
Encode or decode text in your browser, without sending it anywhere.
- URL Encode / Decode
Encode or decode text in your browser, without sending it anywhere.