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TOTP / 2FA Generator

Generate Google Authenticator-style 6-digit codes

000 000

How TOTP works (RFC 6238)

  • A shared secret (Base32) is combined with the current Unix timestamp / period (default 30s) using HMAC-SHA1
  • The HMAC output is truncated to a 6-digit number
  • The code rotates every 30 seconds, in sync between server and authenticator app
  • Most services use the default: SHA-1, 6 digits, 30s period

⚠️ Security notes

  • This tool is for testing and debugging — for real account 2FA, use a dedicated app (Authy, 1Password, Google Authenticator)
  • Never paste production secrets into a browser tool — even with client-side processing, the URL could leak via history/bookmarks
  • All computation here runs locally via Web Crypto API. No network calls, no logging

User Reviews

Average 4.9 stars based on 8 user reviews.

Michelle Zhao2026-05-08
Role: SRE

The page focus is clear: the core is totp generator, 2fa code generator, and credential format review. TOTP Generator can copy the output into a security-debugging workflow; having common options on the page is faster than searching for a command, which makes it easy to judge before using it.

Linda Zhou2026-02-13
Role: Security Engineer

When I need totp generator for 2fa code generator, I care about fewer steps. TOTP Generator keeps SHA-1/256/512 direct; with 6 or 8 digit codes, follow-up review is easier for visitors coming from search.

Emily Lin2026-05-18
Role: Backend Engineer

I found TOTP Generator while looking for free online totp generator, and the real issue was that security debugging needs quick reviewable output. 6 or 8 digit codes and real-time countdown are on the same page, so I can locally validate credentials, hashes, or key formats without stitching several tools together.

Tina Guo2026-02-23
Role: DevOps Engineer

For totp generator work, the important part is whether the output is easy to verify. TOTP Generator puts real-time countdown up front, it reduces manual mistakes with keys, digests, or rules, and it handles 2fa code generator work without sending me to another page.

David Zhang2026-05-02
Role: System Administrator

Our team runs into this during credential format review: uploading sensitive text to third-party services is uncomfortable. TOTP Generator keeps the totp generator flow short, and base32 Secret helps with pre-handoff review for repeated System Administrator work.

Kevin Wang2026-02-07
Role: Tech Lead

I needed totp generator that could locally validate credentials, hashes, or key formats, not just a generic page. TOTP Generator keeps base32 Secret and free online TOTP (Time-based One-Time Password) generator close to the real workflow, and it keeps security checks in the browser.

Ryan Liu2026-05-12
Role: QA Engineer

For people searching totp generator without upload, this page matches the intent well. It is not a generic utility; TOTP Generator is built around 2fa code generator; local processing is better for sensitive text, and the result is easy to keep working with.

Steven Sun2026-02-17
Role: Full-stack Developer

During temporary validation during development, TOTP Generator solves the part I worry about most: uploading sensitive text to third-party services is uncomfortable. By keeping enter a Base32 secret to display Google Authenticator-style 6-digit 2FA codes in real time visible in the workflow, there is less manual cleanup, and the result is ready for testing or configuration, so it belongs in my regular tool list.