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Use case · Shopify

Compress images for Shopify

Image weight is the single biggest factor in Shopify store speed. A product page with 8 unoptimised photos can take 6 seconds to load on mobile. Drop that to 1.5 seconds with proper image compression and watch your conversion rate climb.

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Why it matters

Product image weight directly impacts sales

01

Slow stores lose buyers

Studies consistently show conversion drops 7% per second of additional load time. A 5-second product page converts roughly half as well as a 2-second one.

02

Shopify CDN does not compress aggressively

Shopify serves images via its CDN with size variants but applies modest compression. Optimising the source images yields a much bigger gain than relying on Shopify alone.

03

WebP is widely supported in 2026

Every modern browser reads WebP. Switching from JPG to WebP at quality 80 typically cuts product image weight by 25-35% with no visible difference.

Recommended settings

Recommended settings for Shopify

WebP is the safe default for product photos. Aim for 200-400 KB per high-resolution shot, 50-100 KB for thumbnails. Avoid letting Shopify auto-resize from 4 MB originals.

  • FormatWebP (fallback JPG if needed)
  • Quality80-85
  • Target size200-400 KB per product photo
How to

Optimise images before uploading to Shopify

1

Resize to your theme's max width

Shopify accepts images up to 4472 × 4472 pixels (20 megapixels) and 20 MB, but recommends around 2048 px on the longest side for product photos. Resize to 2048 px first so you control the sharpness instead of letting Shopify downscale a 4 MB original.

2

Convert to WebP at quality 82

Use Morphix's JPG-to-WebP or PNG-to-WebP tool. Quality 82 is the sweet spot for product photography : sharp enough to look professional, light enough to load fast.

3

Upload to Shopify

Upload the optimised files via the product editor or bulk via the Shopify CSV import. Shopify will serve them via its CDN automatically.

FAQ

Common questions

Does Shopify compress images?
Not on upload. The CDN may recompress and serve WebP or AVIF on the storefront. Optimise the source anyway: 2048 px on the long side, 200-400 KB WebP per product photo.
Does Shopify compress images automatically?
Delivery can. Upload does not. Automatic format conversion on the CDN is not a substitute for a 4 MB original.
What is the best Shopify image compressor?
There is no compressor in the admin. Compress with a batch tool before upload, then let Shopify's CDN handle delivery. Shopify's official resizer only resizes.
Will WebP work on iPhone Safari?
Yes. Safari has supported WebP since version 14 (2020). All modern browsers display WebP natively. You can ship WebP as the primary format without a fallback in 2026.
How does this affect SEO?
Page speed is a Google ranking factor. Faster product pages score higher in mobile search. Google indexes WebP normally, so there is no SEO downside to switching.
Related guide

Does Shopify compress images?

Shopify does not compress on upload. It may recompress on delivery and serve WebP or AVIF. Why source files still need work, plus sizes per placement.

Read more

Ready to speed up your store?

Optimise your product images once, see the difference on your next page load.

Convert images for Shopify