How do I regenerate PrestaShop images?

Advanced Parameters → Images → Regenerate thumbnails. Useful after a theme change or size update. Warning: long operation on large catalogs.

Does PrestaShop support WebP?

Yes, since PrestaShop 8. The theme must include the picture tag with JPEG/PNG fallback for older browsers. Seegea automatically converts original images to WebP on import.

Is PrestaShop alt text generated automatically?

Yes, by default PrestaShop uses the product name as alt text for all images. This is insufficient for SEO: ideally each image has a specific alt describing what it shows.

How do I bulk update 5,000 PrestaShop image alt texts?

Via the PrestaShop API or the Seegea module. Seegea provides an alt text column per image in the tabular grid, with AI generation based on the product name and image position.

PrestaShop product image: formats, sizes, SEO

PrestaShop automatically generates multiple thumbnail sizes from your original image. If your original is too small, blurry or poorly named, all your product pages suffer: SEO, speed, conversion. Here is how to configure it correctly.

Seegea manages your PrestaShop product images in bulk

PrestaShop image types

In Advanced Parameters → Images, PrestaShop lists the generated thumbnail types:

cart_default: cart (125x125px)
home_default: homepage (250x250px)
medium_default: product list (452x452px)
large_default: product page (800x800px)
thickbox_default: zoom (800x800px)

Each type is generated automatically when the original image is uploaded.

Recommended format

JPEG for product photos (white background), PNG for logos and images with transparency. WebP (PrestaShop 8+) reduces file size by 25-35% with no visible quality loss.

Original size

Minimum 800x800px, ideally 2000x2000px. PrestaShop scales down but cannot improve an image that is too small. A 400x400 image rendered at 800x800 will look blurry.

Naming and alt text

File name and alt text influence Google Images SEO. Avoid IMG_1234.jpg. Use blue-round-neck-t-shirt.jpg with an alt text precisely describing the image.

After every theme change or image type modification, regenerate thumbnails (Advanced Parameters → Images → Regenerate thumbnails). On 10,000 products, count 30 to 60 minutes.

Google Images SEO: PrestaShop alt text

By default, PrestaShop copies the product name into the alt of all its images. On a product with 8 photos, all 8 images have the same alt text — insufficient for SEO.

The ideal: a specific alt per image describing the content (front view, back view, detail, color, etc.). On a 2,000-product catalog with 5 images each = 10,000 alts to write. Seegea offers batch AI generation.

Criterion	Native PrestaShop	Seegea
Bulk image upload	Impossible	Yes (batch)
Alt text per image	Auto product name	Specific per image + AI
WebP conversion	PS8+ (manual)	Auto on import
Broken image audit	None	Detection + alert
Reorder photos	1 by 1 drag & drop	Bulk drag & drop

Optimize your PrestaShop product images in bulk

Google Meet · demo on your catalog

Optimize your PrestaShop product images in bulk

Images and Core Web Vitals performance

The LCP (Largest Contentful Paint) of your product pages is almost always the main image. A well-optimized LCP (WebP, lazy-loading, right size) is worth 10-15 PageSpeed points — and more SERP positions.

Built in France between Annecy and Chantilly. Official Seegea PrestaShop module v3.9.1, compatible with 1.7, 8 and 9.

Created in France (Annecy – Chantilly) · Email & Google Meet support

FAQ

PrestaShop generates thumbnails from the original image. The original should be at least 800x800px, ideally 2000x2000px. PrestaShop then adapts to the configured image types (cart, home, large).