BigCommerce no longer accepts WBMP and XBM product images
What they said
Read the original ↗“Starting November 9, 2026, we are gradually rolling out the rejection of WBMP and XBM images for products and variants.”
In plain English
From 9 November, BigCommerce is gradually stopping product and variant image uploads in two old, rarely used formats: WBMP and XBM. Once the change reaches your store, uploading one of these files, in the control panel or through the API, gives an unsupported image format error. Images for modifiers, brands and categories aren't affected.
Why it matters
Most stores use JPG, PNG or WebP, so this won't affect them. It matters if an older system, feed or supplier import still sends product images in these formats, as those uploads will now fail.
What to do
- 1Check your image formatsYour developer
If you import products from a supplier feed or older system, check it doesn't send WBMP or XBM images.
- 2Convert any old imagesYour ops team
Save any WBMP or XBM product images as JPG, PNG or WebP and upload them again.
Questions
Which image formats does BigCommerce no longer accept for products?
WBMP and XBM. BigCommerce started rejecting them for product and variant images from 9 November 2026, rolling out gradually.
Are brand and category images affected?
No. BigCommerce says modifier, brand and category image endpoints aren't affected.
Found by our AI agent and checked by Peter Screeton, Founder of Create8. He confirmed the original source is genuine and that this summary matches what it said when published.