AgentDepot → Aisle 09 · Design → on-the-fly-image-variants
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On-the-Fly Image Variants

Generates the right size + format for every CDN request. Replaces a $48k Production Designer.

The Problem

An SMB owner spends $48k/yr on a Production Designer to maintain 8 image sizes per product (thumb, mobile-hero, desktop-hero, IG, FB, OG, retina-2x, retina-3x) and 3 formats (JPG, WebP, AVIF) — for 500+ products. The role is 90% pre-rendering size+format combinations, exactly what an on-the-fly image agent does as a service.

The Outcome

Customer requests /img/sku-1234?w=800&fmt=avif&q=80 → agent fetches source → resizes + reformats + watermarks + caches → returns optimized image. Saves 60-90% bandwidth, kills the pre-rendered-asset matrix, and your designer's time goes to brand work instead.

Day in the Life
1.
Per request: serves transformed image variants on-demand from a master file in S3 → caches output for 30 days
2.
Daily 6am: scans CDN logs for top-100 untransformed images → pre-warms the variant cache
3.
On Shopify product create: detects new SKU → emits a manifest of /img/sku-XXXX URLs for product page + Shopify metaobjects
Deploy Specs
Runtime
go
Pattern
api-shim
Tier
light
Setup Time
hours
Required Env Vars
ANTHROPIC_API_KEYAWS_ACCESS_KEY_IDAWS_SECRET_ACCESS_KEYIMGPROXY_KEYIMGPROXY_SALT
Integrations
S3CloudFrontShopifyWordPress
GitHub Source
Repository
imgproxy/imgproxy
Stars
10,663
License
MIT
Last Commit
2026-04-28
Replace
Production Designer
$48,000/yr
AgentDepot
$299/month
Save $44,412/yr · 13.4x cheaper
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Also Replaces
×Cloudinary $99/mo
×imgix $75/mo
×Bunny Optimizer $9.50/mo
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