Prestashop how to regenerate thumbnails

No worries — PrestaShop actually makes this pretty easy 👍
Here are all the correct ways to regenerate thumbnails, step by step.

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Method 1: From Back Office (recommended)

This is the safest and most common way.

1. Login to PrestaShop Back Office
2. Go to
   Design → Image Settings
3. Scroll down to Regenerate thumbnails
4. Choose what you want to regenerate:
   • Products
   • Categories
   • Manufacturers
   • Suppliers
   • Stores
5. Select one of these options:
   • Erase previous images and regenerate (clean & fresh – slower)
   • Keep previous images and regenerate (faster)
6. Click Regenerate thumbnails

⏳ If you have many products, this can take some time.

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Method 2: Regenerate only missing images (fast fix)

If some images are broken or not showing:

1. Go to Design → Image Settings
2. In Regenerate thumbnails
3. Choose Keep previous images
4. Select only the image type you need (usually Products)
5. Click Regenerate

This avoids deleting existing images.

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Method 3: Via FTP / Server (advanced users)

Useful if images are badly broken.

Steps:

1. Connect via FTP / File Manager
2. Go to:

/img/p/

3. DO NOT delete original images
   Delete only resized images like:

123-home_default.jpg
123-large_default.jpg

4. Then go back to:

Back Office → Design → Image Settings → Regenerate thumbnails

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Important Tips (very important ⚠️)

• ✔ Always clear cache after regenerating
  Advanced Parameters → Performance → Clear cache
• ✔ Disable cache temporarily if images don’t update
• ❌ Never delete original images (123.jpg)
• ✔ Make sure correct image types are enabled
  (home_default, large_default, etc.)

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If regeneration is slow or fails

• Increase PHP limits:

memory_limit = 512M
max_execution_time = 300

• Regenerate one image type at a time
• Disable debug mode if enabled

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If you want, tell me:

• Your PrestaShop version
• Whether this is for products only or everything
• Any error message you’re seeing

I’ll tailor it exactly to your setup 🚀