Cache resized images safely with a long max-age on versioned URLs, immutable for browsers, and a per-format cache key when the format depends on Accept.
- caching
- http
- performance
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See how an image service fits a photo into a box, with worked numbers for crop-to-fill, fit-in, full-fit-in, adaptive-fit-in, manual crops and alignment.
- image-processing
- ecommerce
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Phone photos can carry GPS coordinates in their EXIF metadata. Learn what the tags hold, how to check your own images, and how to strip them before delivery.
- privacy
- exif
- security
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Images are the LCP element on most pages. See where LCP time goes, why image download time is rarely the bottleneck, and which HTML changes load it sooner.
- core-web-vitals
- performance
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Images without dimensions are a top cause of layout shift. See how CLS scores shifts, how width and height reserve space, and how to size art-directed images.
- core-web-vitals
- html
- performance
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Compare resizing images during the build with resizing them on first request, covering build length, file counts, cache misses, new sizes and encoding cost.
- image-processing
- architecture
- performance
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Learn how browsers use srcset width descriptors and the sizes attribute to pick an image file, with worked numbers for a hero banner and a product grid.
- html
- responsive-images
- performance
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Product photos arrive with uneven white margins. Learn how trim with a colour tolerance, fit-in and fill give every catalogue tile the same framing and scale.
- ecommerce
- image-processing
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Compare WebP, AVIF and JPEG on file size, encoding cost and browser support in 2026, then serve each one safely with the picture element or the Accept header.
- image-formats
- performance
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An image worker runs one transformation at a time. Combine your cache hit ratio, peak request rate and processing time with Little's law to size concurrency.
- image-processing
- capacity-planning