Secret Key
JBSWY3DPEHPK3PXP
Notes
Produces a 6-digit TOTP for the current time window (refreshes on the countdown)
Encoding & Decoding
TOTP Code Generator (2FA / Authenticator)
Generate TOTP codes from a Base32 secret in the browser, with SHA-1 / SHA-256 / SHA-512 and 6- or 8-digit codes that refresh with the system clock. Useful for troubleshooting and recovering two-factor login flows. Secrets stay local.
TOTP2FAAuthenticator
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Quick actions
Copy this tool URL or open the system share sheet on a supported device.
编码加解码
TOTP Generator
Generate TOTP codes from a Base32 secret in the browser, with SHA-1 / SHA-256 / SHA-512 and 6- or 8-digit codes that refresh with the system clock. Useful for troubleshooting and recovering two-factor login flows. Secrets stay local.
通常来自 Google / Microsoft Authenticator 的设置页。
使用示例密钥生成动态验证码。
Code
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Time Step 30 sec
Valid For 30s
Use cases
- Reproduce codes when you already have the setup key
- Compare Authenticator apps against server clock skew
- Generate test TOTP values during development
How to use
- Enter the Base32 secret key
- Choose algorithm and digit length
- Copy the current code while it is still valid
Example input and output
FAQ
Why is the code always wrong?
Confirm the secret is Base32, that algorithm and digits match the server, and that the device clock is accurate. Large clock skew breaks TOTP.
Is the secret uploaded?
No. The secret and codes are computed locally. Local processing omits the full secret and live code text.
Tools
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Encode and decode Base32 using uppercase A–Z and 2–7 per RFC 4648. Useful for case-insensitive secrets such as authenticator seeds. UTF-8 text is supported.
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HMAC Generator - API Signature Digests
Generate an HMAC locally from a message and key with SHA-1/256/384/512, outputting Hex and Base64. Useful for API signing and webhook verification checks.
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Password Strength Tester — Entropy and Crack-Time Estimate
Estimate password entropy, character-pool size, and theoretical offline crack time from length and character classes, with improvement suggestions. Evaluation runs entirely in the browser; passwords are not uploaded. Results are theoretical heuristics, not a guarantee of real-world security.
Password Security Entropy