Nano Banana Downloading Wrong Images And How To Fix It

If you are generating images with Gemini’s new Nano Banana models, the "Download" button is currently broken. It frequently downloads an entirely different image that is corrupted from a previous prompt. 😭

The official fix isn't out yet, but the high-res asset exists. You just have to bypass the broken UI to get it.

Update (Jan 29, 2026): I have been unable to reproduce this bug in a while, so it seems that the Gemini team has probably fixed this, however the old images still continue to download wrong.

The Fix

Don't use the download button. Do this instead:

1. Open the Image: Right-click the generated image in chat and select "Open image in new tab."
2. Edit the URL: Look at the address bar. At the very end, you will see a parameter that looks like s1024-rj.
   • Note: s1024 limits the image to the chat preview size.
3. Swap the Value: Delete s1024-rj and replace it with s2752.
4. Save: Hit Enter to load the full-resolution master file, then right-click and "Save Image As."

What's happening under the hood?

In Google’s image serving architecture, the s parameter controls dynamic resizing. By manually requesting s2752, you are forcing the server to deliver the native, uncompressed output of the same image. 🎉

It’s a classic case of a fragile UI layer failing while the backend works perfectly—sometimes you just have to ignore the button and query the source of truth yourself.