Client-Side Tools

Real working privacy and security utilities. Every byte of computation happens in your browser. Nothing is uploaded, logged, or stored.

100% Client-Side
No Network Calls
View Source Welcome

Available Tools

Password Generator

Cryptographically random passwords with tunable length, charset, entropy meter, and Diceware passphrase mode.

crypto.randomdicewareentropy
Hash Generator

SHA-1/256/384/512 and MD5 of text or files. Drag-drop support, live updates, instant copy.

sha-256md5file
Base64 Encoder

UTF-8 safe text encoding plus binary file mode. Decode in either direction with one click.

utf-8binaryfiles
JWT Decoder

Decode and inspect JWT header, payload, signature. Verify HMAC signatures with a pasted secret.

jwthmacverify
Entropy Meter

Shannon entropy, character distribution, and time-to-crack estimates against realistic attacker hardware.

shannondistributioncrack-time

How These Tools Work

Every tool on this page is a single static HTML file with embedded CSS and vanilla JavaScript. No frameworks, no analytics, no fetch calls. Open DevTools and watch the Network tab — it'll be empty.

All computation in your browser No data sent anywhere Works fully offline Source is the page