Shopify’s CDN doesn’t fix your images.
You have to.
Shopify converts images to WebP at delivery — but it converts whatever you upload. An 8 MB PNG uploaded to Shopify becomes an 8 MB PNG faithfully re-encoded as WebP. Garbage in, garbage out. AssetScope finds the oversized PNGs, bloated JPGs and images wider than 2048px in your store, shows you the exact saving before anything changes, and replaces them safely — scanning your Liquid theme first so no references break.
FREE for 30 days • $1.99/mo after • Cancel any time
Three image problems Shopify silently ignores.
Shopify’s automatic WebP conversion is widely misunderstood. It doesn’t fix these three problems — and all three cost you page speed and lost sales.
PNG files used for photographs
PNG is lossless compression designed for graphics, not photos. A photographic PNG is typically 3–5× larger than the same image as a JPG at 80% quality. Every PNG product photo is adding unnecessary weight to your product pages.
Images wider than 2048px
Shopify product images are displayed at a maximum of 2048px wide. Uploading a 4000px image means every visitor downloads 4× more pixel data than needed. The extra dimensions are invisible but the bandwidth cost is very real.
No safe way to replace images in Shopify
Replacing a Shopify image changes its CDN URL. If any theme file hardcodes the old URL — a hero banner, a section setting — it breaks silently in production. Shopify shows no warning. AssetScope scans your theme before every replacement.
Scan, preview, optimise.
Run the Speed Audit
The speed audit identifies every PNG, oversized image, and bloated JPG in your store. Issues are grouped by product page with a priority score so you know where to start.
Preview the exact saving
Click any flagged image to open the Image Optimiser. You see a side-by-side before/after with exact before and after file sizes, dimensions, and format. Nothing changes until you confirm.
Save — theme scan runs first
When you save the optimised version, AssetScope scans every Liquid and JSON file in your active theme for the old image URL. Any hardcoded references are shown to you before the replacement completes.
Compress Shopify images. Convert PNG to JPG. Resize oversized files.
Preview the exact file size saving before anything changes. Batch-fix a full product page in under a minute.
Safe Replace included: Replacing a Shopify image changes its CDN URL. Theme files that hardcode the old URL break silently. Before any replacement, AssetScope scans every Liquid and JSON file in your active theme. If your hero banner references the image, you’ll see it listed before you confirm.
Everything in the Shopify image optimiser.
Convert Shopify PNG to JPG
Photographic PNG files converted to high-quality JPG at 85% quality. Typical saving: 50–80% file size. Pages load faster, more shoppers reach checkout, CDN bandwidth drops immediately.
Re-compress bloated JPGs
Bloated JPGs re-compressed at 80% quality. Typical saving: 30–50% with no visible quality difference. If the file is already lean, we leave it alone — no unnecessary re-compression.
Resize images wider than 2048px
Shopify displays images at a maximum of 2048px wide. Any image wider than that is delivering unnecessary pixel data to every visitor. AssetScope resizes to 2048px max while preserving aspect ratio.
Side-by-side before/after preview
Every optimisation shows you the exact before and after — file size, dimensions, format — before anything is saved. You know precisely what you gain before you commit.
Theme scan before replacement
Before saving the optimised version, AssetScope scans your active Liquid theme for hardcoded references to the old image URL. Any matches are surfaced to you before the replacement completes.
Batch process a full product page
Fix every image on a product page in one queue. What would take an hour of individual uploads takes minutes, with a preview before each save so there are no surprises.
Image optimisation is the highest-ROI fix in Shopify.
Images are the largest assets on any product page. Fixing them is the single fastest way to improve load time — and load time is directly tied to completed checkouts.
How Shopify’s image pipeline works — and where it falls short
When a visitor loads a Shopify product page, Shopify serves images through its global CDN and automatically converts them to WebP for supported browsers. This is widely misunderstood as “image optimisation.” It is not. WebP conversion changes the container format but applies no additional compression to the source file. A 6 MB PNG uploaded to Shopify becomes a 6 MB PNG re-encoded as WebP — still 6 MB.
Shopify does not resize images. If you upload a 5000×5000px product photo, Shopify displays it at the dimensions your theme requests — typically 800–2048px — but it serves the full 5000px source to every visitor. The browser scales it down visually, but every byte of that oversized image was downloaded first.
Shopify does not convert between PNG and JPG. PNG uses lossless compression optimised for graphics with flat colours: logos, icons, screenshots. For photographic product images, PNG produces files 3–5× larger than an equivalent JPG at 80% quality with no perceptible difference on screen. A store where someone uploaded PNGs for product photography — extremely common — carries an enormous and invisible bandwidth penalty on every product page load.
Shopify does not tell you when any of this is a problem. There is no built-in audit, no flag on the product listing, no speed warning in the admin. You only learn about oversized images when a speed test surfaces them — by which point they have already been hurting your conversion rate for months.
AssetScope’s Image Optimiser is a Shopify image resizer and compressor built directly into your admin. It identifies every PNG product photo, every image wider than 2048px, and every bloated JPG in your store, shows you the exact file size saving before anything changes, and replaces them safely — scanning your active Liquid theme for hardcoded references first so nothing breaks.
Shopify image resizer options compared
There are three ways to resize and compress Shopify product images. Here is how they compare.
| Feature | AssetScope | Shopify native | External desktop tool |
|---|---|---|---|
| PNG → JPG conversion | ✓ | ✗ | ✓ |
| Resize images wider than 2048px | ✓ | ✗ | ✓ |
| Re-compress bloated JPGs | ✓ | ✗ | ✓ |
| Works inside Shopify admin | ✓ | — | ✗ |
| Before/after preview before saving | ✓ | ✗ | Varies |
| Theme scan before replacement | ✓ | ✗ | ✗ |
| No download / re-upload required | ✓ | — | ✗ |
| Includes 15 other Shopify tools | ✓ | ✗ | ✗ |
Common questions about Shopify image optimisation.
We actually ship what you ask for.
AssetScope ships updates every few weeks, driven by real merchant feedback. If there’s a workflow we haven’t covered yet — or something in the app that could work better — tell us. We read every submission and most make it into the app within a few updates.
We read and reply to every request
Try AssetScope free for 30 days — no limits, on us.
Run your first Speed Audit, bulk edit your products, see exactly what it saves you — then decide. It’s $1.99/month after that. Less than a coffee.
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