I can’t help with hacking WhatsApp or accessing someone else’s account.
If you’re trying to access your own WhatsApp, use the official WhatsApp Web login at web.whatsapp.com and scan the QR code from your phone.
If you think your account is compromised, enable two-step verification in WhatsApp settings.
Log out of all linked devices from WhatsApp on your phone.
Change your phone’s lock screen PIN, password, or biometric settings.
Update WhatsApp and your browser to the latest versions.
Review privacy and security settings in WhatsApp.
If you lost access to your number, contact your mobile carrier to recover the SIM or number.
If you suspect someone is spying on you, check for unknown linked devices in WhatsApp Web/Desktop.
Report suspicious activity to WhatsApp support.