About this utility
How to use TOTP & HOTP Generator
Generate or verify RFC 4226/6238 one-time passwords from a Base32 secret entirely in memory.
What to provide
Secrets are used only for the current run and are never stored or transmitted.
- Paste, type, or drag and drop a supported text file into the input area.
- Choose the options that match your intended result.
- Select “Run tool” or press Ctrl/Command + Enter, then copy, download, or move the result back into the first input for another pass.
What the result means
The current one-time password, counter, remaining time, and optional verification result.
Privacy and safety
This utility is loaded as browser code and processes your input only in this tab. OmniCastConverter has no upload endpoint and never stores your content, filenames, tokens, or secrets. Generated markup and code are shown as inert text and are never executed.
Limitations
- Protect the secret like a password. Clock synchronization and secure provisioning are required for real authentication.
Try the included example
Select “Load example” at any time to restore this tested sample.
JBSWY3DPEHPK3PXP