Free TOTP 2FA Code Generator — Generate Authenticator Codes Online

Generate live TOTP authenticator codes from your secret key — perfect for developers testing 2FA flows. Keys stay in your browser, never sent anywhere.

Free TOTP 2FA Code Generator — Generate Authenticator Codes Online | syedwaleed.com
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Free TOTP 2FA Code Generator

Generate live two-factor authentication codes from any TOTP secret or otpauth:// link — right in your browser, with a countdown timer and auto-refresh.

Paste a base32 secret from your 2FA setup page, or the full otpauth:// link (we read the secret, issuer, and account name from it automatically). Your key lives only in this tab’s memory — it is never saved, stored, or sent anywhere.

Digits
Algorithm
Time step

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Enter a secret key above to start generating codes.

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Built for developers and QA testers. This tool is handy for testing two-factor login flows, verifying authenticator integrations, and debugging TOTP setup — it is not a replacement for a real authenticator app. Never use it as your only copy of a 2FA secret for a real account.
100% private

Codes are computed on your device with the Web Crypto API. Your secret is never uploaded, logged, or stored.

No signup

Open the page and paste a secret. No account, no email, no waiting.

Free forever

Unlimited code generation with zero limits and no locked options.

How to use the TOTP 2FA Code Generator

  1. 1Paste your secret key

    Copy the base32 secret from the service’s 2FA setup page (or paste the full otpauth:// link) into the input box. The tool reads the issuer and account name automatically.

  2. 2Match the service’s settings

    Choose 6 or 8 digits and the algorithm (SHA-1, SHA-256, or SHA-512) exactly as your service or authenticator app expects.

  3. 3Copy the live code

    The current code appears instantly and refreshes every 30 seconds. Watch the countdown ring and hit Copy code before it expires.

Features

otpauth:// link import

Paste a full otpauth:// URI and the tool extracts the secret, issuer, and account label in one step.

Live countdown ring

A visual ring shows exactly how many seconds remain before the current code expires.

6 or 8 digits

Most services use 6-digit codes, but 8-digit mode is one click away for services that need it.

SHA-1, SHA-256, SHA-512

Pick the hash algorithm your service uses — all three run via your browser’s Web Crypto API.

Auto-refresh

Codes rotate on the 30-second boundary automatically; you never have to reload or re-enter anything.

One-click copy

Send the current code straight to your clipboard, ready to paste into any login form.

Frequently asked questions

Does my secret key leave my device?
No. Every code is computed locally in your browser using the Web Crypto API. Your secret lives only in this tab’s memory while the page is open — it is never uploaded, saved to your computer, or stored on any server.
What is a TOTP code, exactly?
TOTP (Time-based One-Time Password, defined in RFC 6238) is the standard behind most 2FA authenticator apps. It mixes your secret key with the current time using an HMAC hash, producing a short code that changes every 30 seconds and can be verified by the service without any network connection.
Why doesn’t my code match my authenticator app?
Three things must match exactly: the secret key, the digit count, and the hash algorithm. Double-check the base32 secret for typos and confirm whether the service uses 6 or 8 digits and which algorithm it expects.
Should I use this instead of an authenticator app?
No. This tool is meant for developers and QA testers who need to check authenticator flows during development. For real accounts, keep your 2FA secrets in a dedicated authenticator app and don’t use this as your only copy.
What do the SHA-1, SHA-256, and SHA-512 options mean?
They select the HMAC hash algorithm used to compute the code. Almost every consumer service uses SHA-1; SHA-256 and SHA-512 are used by some enterprise and development setups.
Do I need an internet connection to generate codes?
You need a connection to load the page once. After that, all code generation happens offline in your browser — the math only needs your secret and the current time.
Is this tool free?
Yes. Unlimited code generation, no signup, no limits, no locked features.

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