AV-S13
TOTP / HOTP Generator
Generate 2FA codes from a secret, and create otpauth:// links and QR codes for new secrets.
● Runs on your device; nothing is uploadedHow to use it
- Paste an otpauth:// URI, or enter a Secret and choose its format.
- Choose TOTP or HOTP, then set Algorithm, Digits and Period or Counter.
- Read the Current code; press New random secret to create one.
- Scan the QR code or copy the otpauth URI into an authenticator app.
- Type a code into Check a code to validate it.
Limits
- Digits
- 6–10
- TOTP period
- 1–3,600 s
- Code check window
- ±1 step
Features
- TOTP and HOTP with SHA-1, SHA-256 or SHA-512
- Secrets as Base32, hex or UTF-8 text
- New secrets are 20 random bytes (160 bits)
- otpauth:// import and export, with an SVG QR code
- Countdown to the next TOTP code
For AI agents: avtools_totp_generator
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