IDUnify
The sign-in account

One account.
Signed in safely.

IDUnify is the account you use to sign in to a group of community websites. Sign in once with Google or email. Each website learns who you are, and nothing more.

How sign-in works Read the privacy policy
  • Google-verified app
  • Passwords never stored readable
  • Encrypted on every page
  • No ads. No data selling.
Example

Sign in to continue

community.example
Continue with IDUnify
You'll see auth.idunify.com in the address bar.
Secured by IDUnify
What IDUnify is

A single, simple account for the places you belong.

One account

Use the same email or Google account on every website that shows the IDUnify button. No new password for each site.

You decide

A website gets your account ID, email and name only when you choose to sign in there.

Leave any time

Sign out on any website, or ask us to delete your account. Deleting it ends sign-in everywhere.

How sign-in works

Four steps, about ten seconds.

  1. 1

    Tap “Continue with IDUnify”

    On a website that supports IDUnify.

  2. 2

    A secure window opens

    It belongs to auth.idunify.com, not to the website.

  3. 3

    Choose Google or email

    Google or Firebase checks your password. IDUnify never sees it.

  4. You're back, signed in

    The website receives your account ID, email and name.

auth.idunify.com/__/auth/handler

Choose an account

to continue to IDUnify

Your nameyou@example.com
Is this sign-in real?

Check three things before you type a password.

  • The address bar shows auth.idunify.com or accounts.google.com, with a padlock.

  • Google's screen names the app IDUnify.

  • You opened it yourself, from a website's sign-in button.

IDUnify never asks for your password by email, chat or phone. If someone does, it is not us. Tell us at support@idunify.com.

What we keep

Only what sign-in needs.

What a website receives

// example
{
  "account_id":     "u_7Fq2kM…",
  "email":          "you@example.com",
  "email_verified": true,
  "name":           "Your name",
  "photo":          "https://…"
}

Example. Sent when you sign in. Photo only with Google sign-in.

What we never do

  • Sell or rent your data
  • Show ads based on it
  • Tell one website which other websites you use
  • See or store what you do on a website
  • Keep your password in a readable form
Security

Built on infrastructure you already trust.

Accounts

Google Firebase Authentication

Accounts are stored and checked by Firebase, the same service used by millions of apps.

Passwords

One-way password hashing

Email passwords are stored as a scrypt hash. Nobody can read them, including us.

TLS

Encrypted connections

Every IDUnify page uses HTTPS (TLS), with certificates from Google Trust Services and Let's Encrypt.

OAuth

Verified by Google

Google reviewed and verified the IDUnify app name, logo and policies in October 2026.

Tokens · 1 h

Short-lived sign-in tokens

The proof of sign-in a website receives expires after one hour and renews on its own.

Isolation

A window the website can't read

You type your password on auth.idunify.com or Google, never on the website itself.

Help

Common questions

For website owners

Want IDUnify on your website?

IDUnify is open to partner websites by invitation. Tell us about your site and we'll get back to you.

support@idunify.com