Before we discuss third-party tools, it is vital to know that PayPal does not offer a public "search by email" function to protect user privacy. However, you can perform a manual check using PayPal’s own "Send Money" feature. Note: This method requires extreme caution.
It checks if an email address is registered with PayPal by simulating a password reset request (without sending an email). paypal valid email checker
Third-party "checkers" found on forums are frequently associated with illicit activities or security risks: Before we discuss third-party tools, it is vital
Send a PayPal invoice to the email address. If the invoice is paid, the email is valid. This is the most secure, traceable method. Before we discuss third-party tools