OTP Code Generator
Tool Introduction
The OTP Code Generator is a professional online two-factor authentication tool that generates Time-based One-Time Passwords (TOTP). Compatible with Google Authenticator, Authy, Microsoft Authenticator, and other mainstream 2FA apps, it follows the RFC 6238 international standard. All calculations are performed locally in your browser, eliminating key exposure risks and providing reliable protection for your account security.Core Features
Standard TOTP Generation
- Real-time Generation: Automatic code refresh every 30 seconds
- Multiple Tokens: View previous, current, and next authentication codes
- Countdown Display: Visual indicator of remaining code validity time
- RFC 6238 Compliant: Follows international standard algorithms
Convenient User Experience
The tool provides a complete two-factor authentication solution: enter your base32-encoded secret key to generate authentication codes, with QR code scanning for quick import and one-click copy functionality. Suitable for development testing, system configuration, security auditing, and various other scenarios, it's an essential tool for technical professionals and security experts.How to Use
- Enter Secret Key: Input base32 format secret key in the input field (obtained from server)
- View Auth Code: System automatically displays 6-digit verification code, updated every 30 seconds
- Scan QR Code: Use mobile authenticator app to scan generated QR code for quick account addition
- Copy and Use: Click copy button to get verification code for login authentication
Application Scenarios
The OTP generator is widely used in various scenarios requiring two-factor authentication. Enterprise system administrators use it to configure secure login for employee accounts, developers validate TOTP implementations in test environments, and security experts audit authentication mechanisms through it. Whether for Google accounts, GitHub, AWS, or internal enterprise systems, any TOTP-compliant service can use this tool to generate verification codes.Individual users can use this tool as a backup solution when unable to access mobile authenticators. In team collaboration, technical support staff can quickly help users verify and troubleshoot authentication issues. In educational settings, instructors can intuitively demonstrate how two-factor authentication works, helping students deeply understand security mechanisms.
Technical Advantages
- Privacy & Security: All computations performed locally, keys never uploaded to servers
- Wide Compatibility: Supports Google Authenticator, Authy, and all standards-compliant apps
- Zero Latency: Pure frontend implementation with no network request delays
- Free to Use: Completely free with no registration or payment required
Common Questions
Why does the code change every 30 seconds? TOTP is time-based generation with international standards specifying 30-second time windows. This ensures security while giving users sufficient input time. Ensure device time is accurately synchronized, otherwise codes may not match.Which authenticator apps are supported? This tool generates OTP codes compatible with all RFC 6238 compliant applications, including Google Authenticator, Microsoft Authenticator, Authy, 1Password, Bitwarden, and others. Enterprise self-built TOTP systems are equally supported.
How is key security ensured? The tool uses pure browser-side technology with all calculations performed locally on your device. We don't collect, store, or transmit any key information, and all data is automatically cleared when the page is closed.