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Compress Shopify product images on Mac — recommended sizes, the 20MB limit, JPG vs WebP, and a batch workflow that balances storefront speed with product-photo quality. All local, no uploads.
Use category-based KB targets instead of one universal quality value.
Decision Guide
A hub for e-commerce image preparation on Mac — storefront compression, marketplace dimensions, batch naming, and export-safe workflows for Shopify, Amazon and Etsy, all processed locally.
Platform sizing
Compression policy for Shopify product and collection assets.Use exact dimensions or aspect-safe exports so listings, thumbnails, and gallery images keep the expected shape.Catalog hygiene
Shopify Image CompressionPreserve folder structure, naming rules, and metadata choices so the asset set remains usable after export.Team repeatability
Preset lockedSave the workflow as a preset so the next batch follows the same output rules without reconfiguration.
On Shopify, images are usually the heaviest thing on a product page, and page weight directly affects load speed, Core Web Vitals, and conversion — especially on mobile where most shoppers browse. A storefront full of multi-megabyte photos feels sluggish and quietly costs sales.
The goal is balance: small enough to load fast, sharp enough to keep buyers confident in the product. Compression is how you get there, and doing it across a whole catalogue means a repeatable batch process rather than tweaking each image by hand.
Shopify accepts images up to 20MB and up to 20 megapixels, but you should never get close to those limits. For product photos, around 2048×2048px is the practical sweet spot — it satisfies Shopify's zoom feature while keeping files reasonable.
Shopify serves images through its CDN and can generate responsive sizes, but it does not aggressively re-compress your originals. Uploading already-optimized images means faster pages and predictable quality, instead of relying on platform defaults.
JPG is the safe, universal choice for product photos. WebP is smaller at the same visible quality and is well supported, so many Shopify stores prefer it for speed — though JPG remains the most compatible fallback.
Rather than one universal quality value, use target-size compression: set a KB target per asset type so hero shots keep more detail while thumbnails go lighter. That category-based approach hits a consistent page weight without over-compressing your most important images.
Stores updating products regularly should make compression a one-click export step. Build presets per asset category — hero, gallery, thumbnail — then run each new shoot through the matching one.
Defaults that keep a Shopify image batch fast and sharp:
Around 2048×2048px for square product photos — large enough for Shopify's zoom while staying light. Shopify allows up to 20MB and 20MP, but you should stay far below that.
Target roughly 150–300KB per image, set per asset type, using JPG or WebP. That keeps pages fast for Core Web Vitals without visible loss on product detail.
JPG is the universal, safe choice. WebP is smaller at the same quality and well supported, so many stores use it for speed with JPG as a fallback.
Yes. Build presets per asset category, then resize and compress an entire folder of product photos in one batch run with SKU-mapped naming for clean imports.
Yes. A local compressor processes everything on your Mac, so nothing is uploaded to a server and there is no per-image cost.
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