Opera 133 and later

Opera is Chromium-based, so the cache controls are familiar — but the cache option sits on the Advanced tab rather than the basic one.

Clear cached files

1. Press Mod+Shift+Delete, or open Settings → Privacy & security → Clear browsing data.

   

2. Set Time range to All time.
3. Tick Cached images and files and untick anything you want to keep.

   

4. Click Clear data.

If a page still looks wrong afterwards, check whether Opera’s built-in ad blocker or VPN is interfering — both can change what a page loads.