WhatsApp Web is the official browser version of WhatsApp, letting you send and receive messages, calls, and files from a computer by linking it to your phone’s WhatsApp account. There’s no separate account to create — you open web.whatsapp.com, scan a QR code with your phone, and your chats load directly in the browser. This guide covers exactly how to log in on desktop or mobile browsers, what’s changed in 2026 (including new voice and video calling), how to fix the most common login problems, and how the encryption protecting your messages actually works under the hood.