AVIF Cuts File Size 62% vs JPEG, But Encodes 8x Slower: Benchmark Data

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A developer tested 100 real-world images — photos and design assets — across JPEG, WebP, and AVIF formats to measure compression performance. At comparable visual quality, WebP reduced average file size from 820KB (JPEG) to 480KB, while AVIF compressed further to just 310KB. AVIF's gains come at a cost: it encodes roughly 8 times slower than JPEG and 3 times slower than WebP, making on-the-fly compression impractical for large batches. For static websites where images are processed at build time, AVIF is recommended, while WebP remains the safer default for dynamic or user-upload scenarios. Browser support stands at 96.8% for WebP and 93.1% for AVIF as of 2026.

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ProgrammingDEV Community ·

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ProgrammingDEV Community ·

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