Knowledge Center

Explore practical guides for facial authentication, biometric login, online face verification, passwordless authentication, KYC identity checks, and secure FACEIO integration in web applications.

What Is Face Authentication? Explained for Web Apps

What is face authentication? How it works, how it differs from face recognition and password login, key components, and where businesses use it, with a FAQ.

Passwordless Login vs Authentication: What Matters

Passwordless login vs passwordless authentication: the difference, a method comparison table (magic link, OTP, passkey, face), and when to step up to face authentication.

Online Face Verification for KYC Onboarding

How live selfie capture and face matching can contribute to a customer-managed KYC workflow, including scope limits, risk routing, and implementation guidance.

Age Verification Guide for Web Apps

How face-based age estimation works, compliance drivers (COPPA, GDPR, Online Safety Acts), use cases, accuracy, privacy, and how to integrate age checks with FACEIO. No ID required for the lightweight flow.

Face Anti-Spoofing Guide: Presentation Attack Detection

Face anti-spoofing explained: presentation attack types, liveness checks, PAD_ATTACK handling, synthetic-input risk, and application-controlled responses.

Biometric Authentication Launch Checklist

A production-ready checklist: define the auth job, prepare the web flow, handle liveness and recovery, confirm privacy and consent, roll out in stages, and verify server-side.

Face Recognition Login Best Practices for Secure Apps

Best practices for secure face recognition login: explicit enrollment, clear login vs step-up UX, real-world failure handling, and server-side validation on every event.

Face Authentication API Checklist for Production

Production checklist for the face authentication API: backend verification, session binding and token issuance, common integration mistakes, and a FAQ.

Add FACEIO to Your Login Page

A step-by-step tutorial to add FACEIO to an existing login page: enroll users, authenticate, verify server-side, handle errors and fallback, and ship passwordless biometric login.

Developer resources

Build Facial Authentication After Reading the Guides

These knowledge-center guides explain facial authentication, biometric login, face verification, and passwordless authentication patterns. Use the core FACEIO docs and console when you are ready to implement the workflow in a real web application.

Getting Started Create an App ID and prepare your first FACEIO integration. Integration Guide Add fio.js enrollment and authentication to your web flow. Developer Guides Review backend validation, security, webhooks, and deployment patterns. FACEIO Console Create apps, manage settings, and start building with FACEIO.

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