Stay organized with collectionsSave and categorize content based on your preferences.
Sign in users with Google
This document shows you how to use Identity Platform to sign in users with
Google.
Before you begin
This tutorial assumes you've already enabled Identity Platform, and have a
basic web app written using HTML and JavaScript. To learn about
how to enable Identity Platform and sign in, seeQuickstart.
Configure Google as a provider
To configure Google as an identity provider:
Go to theIdentity Providerspage in the Google Cloud console.
Optional:Add OAuth scopes. Scopes specify what data you're
requesting from Google. More sensitive data may require specific
scopes. Consult the provider'sdocumentationto determine what scopes your app needs.
Optional:Localize the authentication flow. You can specify a language,
or use the device's default language:
Web version 9
import{getAuth}from"firebase/auth";constauth=getAuth();auth.languageCode='it';// To apply the default browser preference instead of explicitly setting it.// auth.useDeviceLanguage();
Optional:Specify additional custom OAuth parameters. These are
specific to Google, and are typically used to customize the
authentication experience. You can't pass parameters reserved by OAuth or
Identity Platform.
Use the Google provider object to sign in the user. You can either
open a pop-up window, or redirect the current page. Redirecting is easier
for users on mobile devices.
To show a pop-up, callsignInWithPopup():
Web version 9
import{getAuth,signInWithPopup,GoogleAuthProvider}from"firebase/auth";constauth=getAuth();signInWithPopup(auth,provider).then((result)=>{// This gives you a Google Access Token. You can use it to access the Google API.constcredential=GoogleAuthProvider.credentialFromResult(result);consttoken=credential.accessToken;// The signed-in user info.constuser=result.user;// IdP data available using getAdditionalUserInfo(result)// ...}).catch((error)=>{// Handle Errors here.consterrorCode=error.code;consterrorMessage=error.message;// The email of the user's account used.constemail=error.customData.email;// The AuthCredential type that was used.constcredential=GoogleAuthProvider.credentialFromError(error);// ...});
firebase.auth().signInWithPopup(provider).then((result)=>{/** @type {firebase.auth.OAuthCredential} */varcredential=result.credential;// This gives you a Google Access Token. You can use it to access the Google API.vartoken=credential.accessToken;// The signed-in user info.varuser=result.user;// IdP data available in result.additionalUserInfo.profile.// ...}).catch((error)=>{// Handle Errors here.varerrorCode=error.code;varerrorMessage=error.message;// The email of the user's account used.varemail=error.email;// The firebase.auth.AuthCredential type that was used.varcredential=error.credential;// ...});
Then, retrieve the Google token by callinggetRedirectResult()when your page loads:
Web version 9
import{getAuth,getRedirectResult,GoogleAuthProvider}from"firebase/auth";constauth=getAuth();getRedirectResult(auth).then((result)=>{// This gives you a Google Access Token. You can use it to access Google APIs.constcredential=GoogleAuthProvider.credentialFromResult(result);consttoken=credential.accessToken;// The signed-in user info.constuser=result.user;// IdP data available using getAdditionalUserInfo(result)// ...}).catch((error)=>{// Handle Errors here.consterrorCode=error.code;consterrorMessage=error.message;// The email of the user's account used.constemail=error.customData.email;// The AuthCredential type that was used.constcredential=GoogleAuthProvider.credentialFromError(error);// ...});
firebase.auth().getRedirectResult().then((result)=>{if(result.credential){/** @type {firebase.auth.OAuthCredential} */varcredential=result.credential;// This gives you a Google Access Token. You can use it to access the Google API.vartoken=credential.accessToken;// ...}// The signed-in user info.varuser=result.user;// IdP data available in result.additionalUserInfo.profile.// ...}).catch((error)=>{// Handle Errors here.varerrorCode=error.code;varerrorMessage=error.message;// The email of the user's account used.varemail=error.email;// The firebase.auth.AuthCredential type that was used.varcredential=error.credential;// ...});
Use the credential to sign in the user with Identity Platform:
Web version 9
import{getAuth,signInWithCredential}from"firebase/auth";// Sign in with the credential from the user.constauth=getAuth();signInWithCredential(auth,credential).then((result)=>{// Signed in// ...}).catch((error)=>{// Handle Errors here.consterrorCode=error.code;consterrorMessage=error.message;// The email of the user's account used.constemail=error.customData.email;// ...});
// Sign in with the credential from the user.firebase.auth().signInWithCredential(credential).then((result)=>{// Signed in// ...}).catch((error)=>{// Handle Errors here.consterrorCode=error.code;consterrorMessage=error.message;// The email of the user's account used.constemail=error.email;// ...});
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Hard to understand","hardToUnderstand","thumb-down"],["Incorrect information or sample code","incorrectInformationOrSampleCode","thumb-down"],["Missing the information/samples I need","missingTheInformationSamplesINeed","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-11-11 UTC."],[],[]]
