OTP Generator & Validator
What is an OTP Generator & Validator?
Generate and validate 6-digit Time-Based One-Time Password (TOTP) codes from Base32 secret keys (compatible with Google Authenticator, Authy, and 2FA apps).
Why Use This Tool?
- 2FA Developer Testing: Test 2FA authentication flows during web app development without needing a phone app.
- Secret Key Verification: Verify Base32 TOTP secret keys and check current token expiration timers.
- Security Research: Understand how HMAC-SHA1 TOTP algorithms generate 6-digit codes.
How to Use
- Enter your Base32 secret key (e.g. `JBSWY3DPEHPK3PXP`).
- View the current live 6-digit TOTP code and countdown timer.
- Copy the 6-digit code with a single click.
Real Working Example
Input:
Base32 Secret: JBSWY3DPEHPK3PXP
Output Result:
Current 6-Digit TOTP Code: 482 910 | Time Remaining: 18s
Important Technical Details & Features
- RFC 6238 TOTP Standard: Uses standard HMAC-SHA1 30-second window step calculations.
- Base32 Decoder: Decodes Base32 secret keys directly into binary HMAC buffers.
- 100% Client-Side Memory: 2FA secret keys are never uploaded or stored on any server.
Related Web & SEO Tools
- Base32 Converter: Encode/decode Base32 secret keys.
- Token Generator: Generate random security tokens.
- Basic Auth Generator: Generate Basic Auth headers.
Frequently Asked Questions
Is this compatible with Google Authenticator?
Yes, it uses the standard RFC 6238 TOTP algorithm used by Google Authenticator and 2FA apps.
Is my secret key uploaded to a server?
No, all calculations run locally in your browser memory.
How long is a TOTP code valid?
Standard TOTP codes refresh every 30 seconds.
Is it free?
Yes, 100% free.
What is the main function of OTP Generator & Validator?
Generate and validate Time-Based OTP (TOTP) 6-digit 2FA codes from Base32 secret keys in your browser. This generator produces otp & data instantly in your browser.