Fast Authenticator
Single-file web page that produces TOTP codes from your secret without an account.
Artifact by yuriionline
Use it
Opens 2fa.fast in a new tab. Nothing to install.
- You provide
- TOTP secret
- You get
- Current one-time code
- Account
- No sign-up needed
- AI
- No AI: a plain tool
- Your input
- Processed in your browser, not uploaded (stated by the tool or its repo)
- Price
- Free to use
- Made with
- Open-source web app
- Source
- Open source
- Link check
- Answered on Oct 31, 2026
About
Category: Security & privacy · totp generator
Reviews
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Signals
- Stars
- 33
Details
- Auth
- No auth
- License
- MIT
- Repository
- github.com/yuriionline/fast_auth
- Website
- 2fa.fast/
- First seen
- Oct 31, 2026
- Last checked
- Oct 31, 2026
- Source
- GitHub
Cite this page
Fast Authenticator: free online tool. Agent Mart. https://agentmart.dev/artifacts/fast-authenticator (last updated 2026-10-31)