LeetTools.dev
Fast, secure, and 100% client-side developer toolbox. Your data never leaves your browser, ensuring maximum privacy.
#Generators
Password Generator
Instantly generate secure, random passwords on LeetTools.dev. Create strong, unique passwords locally in your browser.
Passphrase Generator (XKCD)
Generate memorable, high-entropy passphrases based on the XKCD method. Secure, random, and easy to remember.
Username Generator
Generate creative, cool, and anonymous usernames for games, social media, and developer accounts.
UUID / GUID Generator
Generate UUID v4 (random) and v7 (time-ordered) locally in your browser. Batch copy, formatting options, no server.
#Formatters
#Encoders & Decoders
JWT Debugger
Secure, client-side JSON Web Token debugger. Decode, verify, and analyze JWT headers and payloads instantly in your browser.
Base64 & Base Converter
A powerful, all-in-one suite for Base64, Base32, Base58, and Base62 encoding. Fast, secure, and 100% client-side conversion in your browser.
#Archives
Archive Extractor
Browse and extract Zip, 7z, RAR, Tar, and more in your browser. Your file never leaves this device. A password field appears only when you might need it.
Archive to Zip
Turn RAR, 7z, Tar, and other archives into a single .zip download in your browser. Your file stays on this device.
Zip Creator
Combine files into a single .zip download. Add an optional password if you want the archive protected. Nothing is uploaded—everything stays on your device. Other archive types (tar, 7z, …) are not offered here.