VerifyGate (https://verifygate.000.pe)

A two-factor authentication app that lets you generate time-based one-time passwords (TOTPs) with the following features:

• open-source
• it's a web app, so it is accessible through any device
• no storing any sensitive information
• shows you the 2 next upcoming passwords for convenience.

Simply enter your secret key, click "Generate," and get the current and next TOTPs instantly.

It's a lightweight solution designed for maximum security and privacy, especially useful for those who don’t want to store their secret keys in a traditional 2FA app.

You can find it on Product Hunt [ https://www.producthunt.com/posts/verifygate ]