For developers

Free and open source software to rapidly integrate YubiKey strong two-factor, multi-factor and passwordless authentication into your software or service.

Rapid integration of strong authentication

Open Source Code

Integrate the YubiKey with your service, it’s quick and easy. The YubiKey works seamlessly with Windows, MacOS, Linux, iOS, and Android devices. No extra software for your users to download or license. Incorporate the open source YubiHSM SDK to safeguard your organization’s secrets.

Developer Tools

Use our reference documentation and testing tools to rapidly enable one touch authentication for your users. The YubiKey supports FIDO, PIV-compatible Smart Card, One-time Passwords (OTP), and OpenPGP.

Own Your Secrets

Control your own cryptographic secrets. No passwords, keys, PINs or other secrets are
shared with Yubico. Safeguard your organization’s cryptographic keys with the YubiHSM 2 and its open source SDK.

New Developer Program

The Yubico Developer Program provides resources for organizations implementing strong authentication. We offer free workshops, documentation, implementation guides, APIs and SDKs. Join our mailing list to get early access to resources for implementing the FIDO2, WebAuthn specification.

Sign up

Works with YubiKey Program

Join the Works with YubiKey Program to have your products and services featured on the Works with YubiKey catalog. Participate in co-marketing activities that showcase your solution and promote the value of strong authentication.

Learn more

Developer Videos

Introduction: FIDO2 Authentication – Watch now

Core Concepts: WebAuthn Data Flows, Attestation, and Passwordless Watch now

Technical Overview: WebAuthn Server ValidationWatch now

View more

Featured Solutions

Read about some of the recent and most popular YubiKey integrations.

Blog post

YubiKey comes to the iPhone with Mobile SDK for iOS

Read more

Blog post

Yubico and Microsoft Introduce Passwordless Login

Read more

Ecosystem showcase

LastPass leverages the Yubico Mobile SDK for iOS

Read more


Get answers to commonly asked questions

Learn more


Access our free and open source software tools.

Learn more


Access user’s guides, configuration guides, and more for detailed instructions and technical information.

Learn more