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WebP, AVIF, JPEG, PNG, or SVG? The right format depends on the image type. Complete use-case breakdown with real file size data, browser support figures, and a clear decision reference for every image type on your site.

14 specific checks covering format, compression, dimensions, lazy loading, CLS prevention, EXIF stripping, alt text, and SEO. A working reference for every image you upload, not a theory guide.

AVIF, WebP, JPEG, PNG, SVG. The format you choose directly affects LCP scores, Core Web Vitals, and Google rankings. Here is the format-by-format breakdown with use-case recommendations, browser support data, and the one HTML element that serves every format automatically.

AVIF files are 40-50% smaller than JPEG at equivalent quality and browser support is above 94% globally. Here is the honest comparison: where AVIF wins decisively, where JPEG still makes sense, the encoding speed tradeoff, and what it actually takes to start serving AVIF on a real site today.

Passport portals reject photos for three reasons: wrong format, wrong file size, wrong dimensions. Exact KB limits for the US, UK, India, Canada, and Schengen, and how to compress your photo to any target in the browser without sending it anywhere.

Image uploads fail for seven distinct reasons, and file size is only one of them. HEIC format, wrong color space, pixel dimension limits, bad filenames, and corrupt metadata all cause silent rejections. Here is the diagnostic sequence that resolves most failures in under five minutes.

Hero images, featured images, thumbnails, Open Graph, product photos. Exact pixel dimensions and file size targets for every image type on a blog or website, and why the numbers matter more than any cheat sheet.

Images make up over half the weight of the average web page and are the primary reason pages fail Core Web Vitals. Here is exactly how image compression affects your Google rankings, LCP score, and bounce rate — backed by real data from the HTTP Archive, Google, and documented case studies.