hotp-generator

HOTP/TOTP one time passwords on java phones (J2ME)

A serverless progressive web application that generates TOTP and HOTP codes, enabling robust two-factor authentication (2FA) directly within your browser. Powered by Nuxt 4, NuxtUI 4, Cloudflare Pages, Vercel and Upstash Redis.

HMAC Based One Time Passwords in PHP. RFC4226 and RFC6238 compliant.

Nextcloud app that allows you to manage your OTP (TOTP/HOTP) codes easily

Nextcloud app that allows you to manage your OTP (TOTP/HOTP) codes easily

HOTP and TOTP algorithms in Erlang.

Online One Time Password (HOTP/TOTP) generator.

TOTP authentication for Python, the command line, and automation.

Go library for one-time passwords, supports HOPT and TOPT (Google Authenticator compatible)

Minimal Free Pascal implementation of TOTP and HOTP algorithms using SHA1 and SHA256. Supports both time-based and counter-based OTP generation.

Trezur is a fast, secure, light-weight web-app to generate TOTP and HOTP tokens.

Cross-platform console C#/.Net implementation to generate one time passwords (TOTP/HOTP) for open authentication defined by standard RFC's (4226, 6238). Compatible with Google/Microsoft Authenticator apps.

A simple, easy-to-use one-time password generator implementation for .NET Core 3.1. Compatible with Google Authenticator.

A fine TOTP/HOTP 2FA extension for Firefox with optional sync and auto fill.

OTPLib Delphi Library

Azokle Auth is a privacy-first authentication system with end-to-end encryption and Zero-Knowledge Architecture. It supports passwords, TOTP, FIDO2/WebAuthn, and multi-factor authentication, providing secure, flexible, and developer-friendly identity management for web, mobile, and enterprise applications.

.NET lib to geenrate TOTP AND HOTP fast and secure

A Swift library that provides cryptographic authentication algorithms like OCRA, HOTP etc.

Kotlin Multiplatform library for OTP and TOTP password generation/validation

HMAC-based one-time password generator. https://www.nuget.org/packages/sim756.HOTP