Home / Sign-in URL checker
Free tool · nothing leaves your browser
Is this sign-in page real?
Paste the address you are about to sign in on. This checks whether the domain genuinely belongs to Microsoft, Google or Yahoo, and flags the tricks fake pages use to look like they do.
Check a sign-in address
Copy the whole address from your browser address bar. Only the domain is examined.
Try one: a genuine Microsoft page · the subdomain trick · a lookalike
What this actually checks
Most people spotting a fake sign-in page are told to "check the URL", which is good advice that nobody can act on reliably, because the interesting part of a web address is not where people look. This tool checks the five things that matter.
| Check | What it catches |
|---|---|
| Real owner of the domain | Whether the registrable domain genuinely belongs to Microsoft, Google or Yahoo |
| The subdomain trick | login.live.com.attacker.net — contains a real domain but is owned by someone else |
| Brand bait | Words like outlook, verify or secure in a domain that is not the provider's |
| Punycode / homographs | xn-- domains that can render as ordinary-looking letters |
| Plain HTTP and raw IPs | Sign-in pages that are unencrypted or hosted on a bare IP address |
Why the subdomain trick works on almost everyone
Take these two addresses:
https://login.live.com/oauth20_authorize.srf
https://login.live.com.account-verify.net/oauth20_authorize.srf
The second is not Microsoft. The domain that owns a page is the part immediately before the
final suffix, so the owner there is account-verify.net, and
login.live.com is just a subdomain it chose to name that way. Anyone can create it.
This defeats the natural instinct, which is to scan the address for a familiar name and relax when you find one. It also defeats naive checkers that ask only whether the real domain appears somewhere in the address. This one looks for the construction specifically.
The genuine sign-in domains
Worth knowing by sight, because the reliable habit is typing the address yourself rather than checking one you were sent.
| Provider | Genuine sign-in domains |
|---|---|
| Microsoft / Outlook / Hotmail | login.live.com, login.microsoftonline.com, account.microsoft.com, outlook.com, outlook.live.com |
| Google / Gmail | accounts.google.com, myaccount.google.com, mail.google.com |
| Yahoo | login.yahoo.com, mail.yahoo.com |
What to do if a page fails the check
- Do not type anything into it. Not your password, not your email address, not a verification code. Close the tab.
- Go to the provider directly. Open a new tab and type the address yourself, or use your own bookmark. Never return through the same link.
- If you already entered a password, change it now on the provider's real site, and change it anywhere else you reused it.
- Check your recovery details. The first thing an attacker changes is the recovery email or phone, to lock you out of your own recovery.
- Review recent activity in your account's security settings for sign-ins you do not recognise.
MailFixly will never ask for your password. No page on this site has a password field, and this tool sends nothing anywhere. If you find a page claiming to be us that asks you to sign in, it is not us — tell us about it.
Privacy
The check runs entirely in your browser. There is no network request in the tool, nothing is logged, and nothing is stored. You can verify that by opening your browser developer tools and watching the network tab while you use it, which we would rather you did than take our word for it. See our privacy policy.