Fix WhatsApp Web Error 400 Bad Request QR Page Not Loading (2025)

Updated: 11/29/2025

You open web.whatsapp.com to link your phone, but instead of the QR code you see Error 400 Bad Request, a blank page, or an infinite spinner. Your phone app still works, and other sites load fine in the same browser, which makes it even more frustrating. Error 400 usually means the browser is sending corrupted cookies or headers to WhatsApp servers, or your connection is being altered by proxies, VPNs, or strict network policies.

Table of Contents

Method 1: Clear Cookies And Local Storage Just For WhatsApp Web

Open an incognito or private browsing window and load WhatsApp Web there, then scan the QR code with your phone. If it works in private mode but not your main profile, your usual cookies, extensions, or cached data were the issue and should be cleaned up more thoroughly.

Method 2: Disable VPN, Proxy, And Strict Filtering Temporarily

Connect your laptop to a mobile hotspot or another Wi Fi network and try WhatsApp Web again. If it loads correctly on the alternate connection, your original network, office firewall, or ISP is likely modifying requests and you may need network admin help to whitelist WhatsApp domains.

Warning: If you use WhatsApp Web on a work device behind a corporate proxy, bypassing those controls without permission can violate company policies, always confirm acceptable use rules first.

Method 3: Fix Time, DNS, And Network Stack Issues

In your adapter settings set DNS servers to known reliable ones like 8.8.8.8 and 8.8.4.4, then reconnect to your network. This reduces the chance of bad lookups causing malformed requests that lead to 400 errors on WhatsApp’s side.