The verdict in three sentences
On a store, the product gallery is both the heaviest asset and the most decisive one for convincing buyers. Uploading raw 3-6MB phone photos crushes mobile speed and drives shoppers away on 3G. An optimization pipeline brings each image to 150-400KB in WebP, cuts 60 to 80% of the weight and gains 10 to 20% speed, with no visible loss.
Format comparison
Format and compression choices decide everything. 2026 order of magnitude for a 1600px-wide product photo:
| Format | Typical weight | Perceived quality | Browser support |
|---|---|---|---|
| Raw JPEG (phone) | 3-6 MB | Excellent | Universal |
| Recompressed JPEG 80% | 400-700 KB | Very good | Universal |
| WebP quality 80 | 150-400 KB | Very good | All modern |
| AVIF quality 55 | 90-250 KB | Good to very good | Recent |
| PNG (avoid for photos) | 5-9 MB | Excellent | Universal |
WebP is the best universal compromise; AVIF saves another 20-30% on recent devices, with a JPEG fallback.
The pipeline, step by step
A product image should never go online raw. Here is the chain, from phone to buyer's screen:
| Step | Action | Effect |
|---|---|---|
| 1 | Resize to max display size (e.g. 1600px) | -50 to -70% weight |
| 2 | Convert to WebP/AVIF quality 75-80 | -60 to -80% weight |
| 3 | Generate a responsive srcset (400/800/1600) | Right file per screen |
| 4 | Lazy-load below the fold | -30% initial requests |
| 5 | Serve/resize via CDN | Lower TTFB |
| 6 | Blur-up placeholder while loading | Instant feel |
Automated, this pipeline processes a whole catalog with no image-by-image manual work.
Mini case study
Awa runs a fashion store in Accra with 60 products, each 5 raw photos of 4.5MB: 1.35GB of images, a product page that loads in 9s on 3G. After the pipeline (WebP averaging 280KB), each page drops to 1.9s. On 5,000 mobile visits/month with conversion rising from 1.4% to 1.9%, she gains 25 orders. At an average basket of 22,000 FCFA, that is 550,000 FCFA in extra monthly sales for a one-time optimization.
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FAQ
Will I see a drop in quality?
At WebP quality 80, the difference is invisible to the eye on a phone screen. We keep the detail that sells while removing useless weight.
Do I have to re-upload all my products?
No if the pipeline is automated: it batch-processes existing images and optimizes every new upload automatically.
Does product zoom stay sharp?
Yes. We generate a dedicated high-definition version for zoom, loaded only when the buyer zooms, without bloating the base gallery.
How much weight do I actually save?
Between 60 and 80% on average: a 2.4MB gallery drops under 600KB. It is the most profitable optimization on a store.
What is blur-up for?
It shows an instant blurred version while the sharp image loads, giving a sense of speed and avoiding layout shifts (CLS).
Let's talk about your project. We audit the weight of your product pages and set up the WebP pipeline in a few days. WhatsApp +221 77 596 93 33.
Mohamed Bah
Fondateur, Kolonell
Passionate about digital and entrepreneurship in Africa, Mohamed has been helping Sénégalese businesses with their digital transformation since 2020. Founder of Kolonell, he believes every SME deserves a professional and accessible online présence.
