KeythenticFree password & 2FA tools
Small, useful tools from the people who make Keythentic. Each runs on the page itself, with no account, no tracking and no server reading what you type.
Runs in your browserPassword generator
Random passwords from your browser’s secure random generator. Choose the length and character sets, and leave out look-alike characters if you like.
Open tool →Passphrase generator
Diceware-style passphrases from the EFF’s long word list. Easy to type, easy to remember, hard to guess.
Open tool →Password strength checker
Estimates how long a password would take to crack and spots common patterns like years, keyboard runs and reused words.
Open tool →Breach check
Checks whether a password has appeared in a known breach, using k-anonymity: only 5 characters of its hash are sent.
Open tool →2FA code tester
Shows live TOTP or HOTP codes for a base32 secret. Supports SHA-1, SHA-256, SHA-512, 6–8 digits and custom periods.
Open tool →QR & link decoder
Reads a 2FA QR code image or otpauth:// link and shows the issuer, account and settings inside it.
How we keep these tools private
- No ads, no sign-up and no analytics. The tools load no third-party scripts or fonts. View the source if you like.
- Randomness comes from
crypto.getRandomValues, neverMath.random, and without modulo bias. - Nothing is saved. Reload the page and it’s gone.
- The breach check is the only tool that uses the network, and it shows you the exact 5 characters before sending them.