TOTP generator & verifier

Put it to work

Generate and verify test OTPs with a Base32 secret.

From input to output

Open TOTP generator & verifier and load the example.
Read the format notes, choose your options, and replace the example with your input. Start with test data instead of sensitive information.
Run the tool and inspect the result and status. If an error appears, correct the input format and run it again.
Copy the output or download a file. Generated and converted results are not saved automatically.

Generate and verify test OTPs with a Base32 secret. Verification allows ±1 time step. Current-time mode calculates when run and does not synchronize with a server.

Example input

mode: generate
secret: GEZDGNBVGY3TQOJQGEZDGNBVGY3TQOJQ
algorithm: SHA-1
digits: 6
period: 30

Reading the result

RFC 6238 example (set time = 59, digits = 8, period = 30):
SHA-1 OTP = 94287082

Details that matter

Format and meaning

Verification allows ±1 time step. Current-time mode calculates when run and does not synchronize with a server.

Supported scope and limits

Text 1 MB

Split inputs that exceed the limit. If a format or algorithm is unsupported, choose a tool that matches your requirements instead of silently changing the format.

What happens to your data?

Tools run in your browser. DNS lookup sends the queried domain to the named external provider. Ads may appear on home, guide, and workspace pages according to settings.

Open tool

Put it to work

From input to output