Hii,

please check Pilow has Support webp using following code 

from PIL import features

print ( "Webp Support" , features . check ( 'webp' ))

if return False, you don`t have webp support in pillow

to enable webp, reinstall pillow 

if you are using ubuntu then first install 
libwebp using following command

sudo apt-get install libwebp-dev

after install libwebp you can install pillow 

please try this i hope it is usefull

This error happens because the image library Odoo uses (Pillow/PIL) doesn't recognize the WebP format. While Pillow does support WebP, many Odoo installations don’t have this support enabled by default (it depends on whether the libwebp library is installed on the server).

Why does it work with JPG/PNG but not WebP?

• JPG and PNG are natively supported by Pillow.
• WebP requires Pillow to be compiled with libwebp support. If it's missing, you’ll get errors like the one you reported.

Possible solutions

1. Enable WebP support on the server
   • If you have access to the Odoo server, install libwebp and reinstall Pillow:

     
     sudo apt-get install libwebp-dev
     pip3 uninstall pillow
     pip3 install --no-cache-dir pillow
     

     This will enable WebP support and allow you to import images from URLs directly.
2. Convert the images before importing
   • If you cannot change the server setup, the most stable option is to convert the WebP images to JPG/PNG using a pre-processing script (e.g., with cwebp or ImageMagick) and then import them.
3. Import images as base64 but without using CSV
   • If the problem is the character limit in CSV/Excel, you can upload images via XML or using a Python script through Odoo's API (xmlrpc or jsonrpc). This avoids the cell limit issue.
   Example using the API:

   
   import base64
   import requests
   
   image_url = "https://example.com/image.webp"
   image_data = base64.b64encode(requests.get(image_url).content).decode('utf-8')
   
   models.execute_kw(db, uid, password,
       'product.template', 'write',
       [[product_id], {'image_1920': image_data}])
   

Recommendation

If you have access to the server, enabling WebP support in Pillow is the easiest fix. Otherwise, convert your images to JPG/PNG or use an alternative import method (script/API) to bypass the CSV cell limit.

Hi Anders

can you check if you have the right pillow version installed?

try to uninstall it and install it again. Looks from the first view an error occurring from pillow library

I will make another test, debug and come back to you, if the recommendation above, does not solve the problem. (could be that at the end, you have to create a ticket to odoo suppport)

Hi Anders,

Having the same issue in Odoo 18. Were you able to solve it?