Master 2FA with the TOTP Generator
Developing a Two-Factor Authentication (2FA) system and need to test if your codes are validating correctly? Or perhaps you lost your phone and need to manually generate a code from a backup secret? Generate time-based tokens instantly with our developer-friendly TOTP Generator.
What is the TOTP Generator?
The TOTP (Time-Based One-Time Password) Generator is a utility that creates temporary, rotating 6-digit codes based on a shared secret key and the current time. It utilizes the standard algorithm (RFC 6238) used by popular authenticator apps like Google Authenticator and Authy. It’s an invaluable tool for developers testing 2FA implementation or users recovering access via manual entry.
Step-by-Step Guide: How to Use It
- Enter Secret Key: Paste your Base32 encoded secret key (often provided as a string of letters and numbers when setting up 2FA).
- Configure Settings (Optional): If necessary, adjust the token length (usually 6) or the time step (usually 30 seconds), though defaults work for 99% of services.
- Generate Code: The tool will instantly calculate the current valid TOTP code.
- Watch the Timer: Note the countdown timer. The code will automatically refresh every 30 seconds to maintain sync.
Practical Use Cases
- Development and Testing: Developers integrating 2FA into their apps can use this tool to quickly verify that their backend validation logic matches standard TOTP generation.
- Account Recovery: If you only have the text-based backup secret from a service and cannot use your phone, you can generate the required login code here.
- Demonstrations: Easily show clients or team members how time-based tokens are calculated without needing to set up a physical mobile device.
Frequently Asked Questions
- Why is my generated code not working? The most common reason is time synchronization. Ensure your computer’s system clock is completely accurate, as TOTP relies heavily on exact timing.
- What is Base32? Base32 is an encoding format used to represent the secret key in text form, using only uppercase letters A-Z and numbers 2-7 to avoid visual ambiguity.
- Is entering my secret key here safe? Our tool calculates the TOTP locally in your browser. However, for maximum security of actual live accounts, it is always recommended to use a dedicated, offline authenticator app.