Google Login Script Generator
Google Login Script Generator – Create Google OAuth Login
In this guide, you will learn how to quickly generate a Google Login Script — without any backend. It will work on Blogger, static websites, or any other HTML site. This article is SEO-optimized, step-by-step, and includes practical examples so you can copy and use the code immediately.
Why Google Login Script?
Social login improves user experience by providing fast access, reducing friction, and increasing trust. Google Sign-In (GSI) lets users login in one click. If you want dynamic user actions like comments, downloads, or premium access on Blogger or static sites, a Google Login Script is very helpful. For non-backend solutions, this approach is ideal.
Overview: What You Need
Essential requirements:
- A Google Cloud Console project
- OAuth Client ID (Web Application)
- Google Identity Services (GSI) library (CDN loaded)
- A small frontend script (sessionStorage/localStorage to handle login)
Step 1 — Create Google Client ID
Go to Google Cloud Console and create a new OAuth Client ID. For Blogger or static sites, configure Redirect URI carefully. Steps:
- Google Cloud Console → Credentials → Create Credentials → OAuth Client ID
- Application type → Web Application
- Authorized JavaScript origins: your site (e.g.,
https://proxmlcreator.blogspot.com) - Authorized redirect URIs: optional for GSI frontend-only flow, but recommended for security
Note: For production apps, Authorization Code Flow with PKCE is more secure. Here we show a simple frontend-only approach suitable for Blogger or static sites.
Step 2 — Simple GSI Script (Copy-Paste Ready)
Below is a fully working script using Google Identity Services (GSI). It stores user info in sessionStorage and clears it automatically when the browser tab closes. No backend required.
Step 3 — Session Handling (Auto-Logout)
We use sessionStorage so that the user session ends when the browser tab closes. For long-term login, localStorage can be used, but it is less secure.
Session Behavior:
sessionStorage— clears on tab close (auto logout)localStorage— persistent until manually removed
Best Practices & Security
- Use HTTPS: All redirects and origins must be HTTPS
- Keep CLIENT_ID safe: Public on client-side is okay, secret must never be in client-side code
- Prefer Authorization Code Flow for sensitive apps: Required for refresh tokens or long-lived access
- Validate ID token: In production, validate tokens using Google OAuth endpoints
- Least privilege: Use only
openid email profilescopes
Common Troubleshooting
- Redirect mismatch: Ensure origin is registered in Google Console
- Prompt loop: Check
promptparameter; useprompt=nonein production if needed - iOS Safari limitations: Popup behaviors and orientation may differ; test thoroughly
FAQ
Q: Will it work on Blogger?
A: Yes, you can copy-paste the script into Blogger posts or template. Replace CLIENT_ID.
Q: What scopes are needed?
A: Usually openid email profile is sufficient.
Q: Is storing token safe?
A: Storing tokens client-side is safe if you don’t access sensitive data. For production, validate server-side.
Q: How to logout?
A: Remove sessionStorage item and reload page: sessionStorage.removeItem('user'); location.reload();
Conclusion & Resources
This article provides a practical, SEO-optimized way to create Google Login Scripts for Blogger or static websites. The script is frontend-only, simple, and auto-manages session.
You can also create a downloadable starter project with demo HTML, README, and quick setup.