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WebP vs AVIF vs JPEG vs PNG: Which Image Format Should You Use and How Can You Reduce File Size?

Image format still matters. A 1.8 MB hero photograph can be the main cause of poor LCP, while a lossless PNG used for photographic content can be many times heavier than a carefully encoded WebP or AVIF file. On the other hand, aggressively converting every asset to the newest format can reduce text sharpness, increase build cost or cause problems in older clients and external publishing systems.

Website Audit in 2026: The Complete SEO, Core Web Vitals, Accessibility and Security Checklist

A good website audit is not a single Lighthouse score or a list of several dozen automated warnings. It should answer four questions: can a search engine correctly discover and understand the website, can a user complete their task efficiently, is the website fast enough, and does it expose the owner or visitors to unnecessary risk?