Convert batches of token serial numbers and shared secrets from Base32, hexadecimal, or Base64. Plain output can use any of those three encodings, while CSV and otpauth:// URI are available as structured output formats.
CSV preserves the selected input encoding and adds the OTP type, issuer, algorithm, code length, and the applicable period or initial counter. URI output follows the authenticator provisioning format, uses each serial number as the account label, and encodes the secret as Base32.
All conversion runs locally in the browser; secrets are not uploaded. Test converted values with the HOTP generator or TOTP generator. For Microsoft hardware-token provisioning, use the Entra OATH tool; for portable token containers, use the PSKC generator.