Workspace / Generate a counter-based sign-in code (HOTP)
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Generate a counter-based sign-in code (HOTP)

Generate a one-time code that changes after each use, instead of changing with time.

Input

Up to 200 KB

Result

Your result will appear here.

 Processed on your device · Content is not stored.


Instructions & limits
How to use
Generate a one-time code that changes after each use, instead of changing with time.
  1. Enter the private key provided by the service.
  2. Enter the current use counter if your service requires one.
  3. Generate the next code using the account’s current counter.
When to use this tool
Generate a one-time code that changes after each use, instead of changing with time.
Example input
JBSWY3DPEHPK3PXP
Limit
Processes supplied input only. Review the output and the units or assumptions before use.
Frequently asked questions
Where is my data processed?
No. Your content is processed on your device. We do not receive your input or results.
Do I need an account?
No. Use the tools for free without signing in. Favorites and recent tools are stored only in your browser.
Does this work on mobile?
Yes. This tool supports phones and modern browsers. 
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