Data breach search for any email, username, phone or domain
See whether what you type turns up in leaked data, how many breaches it appears in, and whether a password leaked with it. Free and masked, with nothing to sign up for.
- Five free checks a day
- Masked results
- Nobody is notified
What a check shows
Every record found holds exactly what you searched. The check counts them, names the breaches they came from, and shows a sample.
Records and breaches
How many breach records hold the address, username, number or domain, and how many separate breaches they come from, with each breach’s name and the month it happened.
What leaked with it
For each record in the sample: whether a password, a password hash, an IP address, a phone number or a full name leaked alongside. That tells you how much each breach matters.
Masked, on purpose
Addresses and usernames show their first letters only, and leaked values are never shown. Enough to recognise your own records, not enough to misuse someone else’s.
Search by what you have
Each kind of identifier leaks in its own way. These pages search one kind at a time and explain what a result means for it.
What a result means
A record means a copy of some company’s data, holding what you searched, has been leaked and is in circulation. It doesn’t mean someone has used it, and it doesn’t mean your accounts today are open.
What matters is what leaked beside it. An address on its own brings spam and phishing. An address with a password, or a hash of one, is how accounts get taken over, because people reuse passwords and leaked lists are tried against other sites for years.
No records is good news but not proof: some breaches are never made public, and a record may hold an older address of yours. The leaked password check explains how to tell whether a password went with it.
If your details turn up
Change the leaked password
On the breached site and on every other site where you used the same one.
Turn on two-factor sign-in
An authenticator app or a passkey, rather than text messages where you can.
Expect convincing phishing
Leaked details make a scam email or text look genuine. Go to the site yourself instead of clicking.
The full records are on Seer
This site shows how many breach records hold what you searched, and a masked sample of them. The check is run by Seer, which shows the full records: which breach each came from, when, and what leaked with it.
Seer also searches stealer logs, the records malware takes from infected devices, and finds the social accounts tied to an email address, username or phone number.
Try Seer’s free check- Breached credentialsEvery record an email address, username, phone number or domain appears in.
- Stealer logsLogins captured by malware on infected devices, searchable by email, username or domain.
- Social accountsAccounts on 740+ platforms by username, 106 by email address and 20 by phone number.
- Plans and pricingWhat a free account includes, and what the paid plans add.
Questions
How do I check if my data was in a breach?
Type an email address, username, phone number or domain into the box and press Search breaches. The check looks for breach records that hold exactly what you typed, then tells you how many there are, how many breaches they come from, and shows a few of them masked.
Is this data breach search free?
Yes. There is no account to create. Each visitor gets five checks a day, shared with Seer’s free check at seer.to, and they come back after a day.
What can I search for?
An email address, a username, a phone number with its country code, or a domain. A domain search counts the records for addresses at that domain, which is how a company sees its staff’s exposure.
Why are the results masked?
A check shows enough to recognise a record without exposing it: the breach’s name and date, the first letters of the address or username, and which fields leaked with it, never their values. The full records are on Seer.
Will the person I search for be told?
No. Nothing is sent to the address, number or account you search, and nothing is posted anywhere.
Does “no records found” mean my data is safe?
It means nothing turned up for exactly what you typed. Breaches surface years after they happen, some are never made public, and a record may hold an older address of yours. Check every address and username you use.
My email is in a breach. What now?
Change the password for that site and anywhere else you used it, turn on two-factor sign-in, and watch for emails that use the leaked details to look genuine. The guide to what to do after a data breach goes through it step by step.
Does this site keep what I search?
This site keeps nothing. The check is run by Seer, which logs each check as its privacy policy describes. The privacy page here explains exactly what goes where.