# 2FA Code Generator

> Generate one or up to 50 TOTP codes in your browser.

Generate one or up to 50 TOTP codes in your browser. No uploads, account, or secret storage. Paste a Base32 key or otpauth URI and copy instantly.

## Facts
- Website: https://2facode.im
- Categories: Security & Privacy
- LotsDirectory page: https://lots.directory/products/2fa-code-generator
- Listing state: Unclaimed. We listed this product from its public website, and its owner has not claimed it yet.

## Detailed info

## What is 2FA Code Generator?

2FA Code Generator is a browser-only utility that calculates RFC 6238 TOTP two-factor authentication codes from Base32 secrets or otpauth URIs without server uploads.

## What 2FA Code Generator does

2FA Code Generator calculates time-based one-time password (TOTP) codes locally within the browser tab following the RFC 6238 standard. It accepts single or batch inputs up to 50 lines using Base32 secret keys or otpauth://totp URIs, supporting custom labels, algorithms like SHA-256 and SHA-512, and custom periods. The tool features countdown timers, refreshes codes automatically, and decodes QR screenshots in the browser without calling an API or saving authentication data to browser storage.

## Who 2FA Code Generator is for

Users and developers who need to generate temporary two-factor authentication codes or test TOTP keys in a web browser without installing an app or storing credentials.

## Key features

- Calculates standards-based TOTP codes in the browser tab using Base32 keys or otpauth URIs under RFC 6238.
- Supports batch processing of up to 50 labeled entries simultaneously with individual status reporting.
- Automatically refreshes active codes and displays countdown timers for remaining validity periods.
- Operates without sending secrets to a server API or persisting keys in browser storage.
- Allows uploading QR screenshots that decode only in this browser to read setup secrets.
- Reads supported settings from otpauth URIs including SHA-256, SHA-512, seven or eight digits, and alternative periods.

## Facts from 2facode.im, checked 8 November 2026

- Generates codes entirely on-device using bundled browser cryptography including Web Crypto and otplib.
- Operates under the RFC 6238 TOTP standard with default 30-second time steps.
- Processes up to 50 secret entries in a single batch without persistent storage.
- Free to use without an account or advertising scripts.

Written from 2FA Code Generator's own website ([Homepage](https://2facode.im/), [About](https://2facode.im/about/)). The maker can claim this listing to edit it.

## FAQ

### Is 2FA Code Generator free to use?
Yes, it is free to use online with no account required and no paid generation limits.

### Are secret keys or generated codes sent to a server?
No, all code calculations run inside the browser tab and no secret keys or codes are transmitted to servers or saved in storage.

### How many secret keys can be processed at once?
The batch generator accepts up to 50 lines in a single batch with support for custom labels.

### Which TOTP standards and algorithms are supported?
It follows RFC 6238, supporting the default 30-second HMAC-SHA-1 format as well as SHA-256, SHA-512, and custom periods via otpauth URIs.

### Can 2FA Code Generator recover a lost secret or bypass 2FA?
No, it cannot recover missing secrets or bypass two-factor authentication; the original shared secret key is required.

### Does the tool store secrets after closing the tab?
No, entries exist only in temporary page memory and disappear when you clear the workspace, reload, or close the browser tab.

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Source: https://lots.directory/products/2fa-code-generator · Machine-readable context by LotsDirectory.