Have I Been Pwned

Have I Been Pwned is an online service designed to check whether personal information has appeared in publicly disclosed data breach incidents. It is mainly aimed at general internet users, developers, and security researchers. By entering an email address, users can quickly find out whether that address has been exposed in known breach databases, including incidents involving website compromises and leaked account credentials.

The platform aggregates data from publicly reported security breaches and leak disclosures. No registration is required to perform a query, and the results are presented as informational alerts to help users understand potential account risks. In addition to email checks, the service also offers password breach detection and API access, and is commonly used for personal security self-checks, enterprise security audits, and risk-warning features in application development. Overall, it is positioned as a neutral, non-commercial information security tool and public safety resource, suitable for raising awareness of data security among individuals and organizations.