When implementing TOTP-based authentication, one of the biggest challenges during development is testing verification flows efficiently.
Most developers rely on authenticator apps installed on mobile devices. While this works, it slows down debugging and automated testing processes.
A simpler alternative is using an online OTP generator like 2fa.cn
.
Typical Testing Problem
You are building a login system that requires:
User enters username/password
System requests TOTP code
User enters generated code
To test step 3 repeatedly, switching between devices becomes inefficient.
A More Efficient Workflow
By using 2fa.cn:
Paste your shared secret key
Generate TOTP instantly
Validate authentication flow in seconds
No installation required.
No account setup needed.
Benefits for Developers
Faster debugging
Easier QA testing
Better demonstration during client meetings
Useful for educational tutorials
If you frequently work with authentication APIs or security features, having a browser-based OTP generator can significantly improve productivity.
Try it here: https://2fa.cn
Tags: security, 2fa, totp, authentication, devtools
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