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JPG to WebP shaves roughly 25–35% off file size at equivalent visual quality — the standard upgrade when optimising a site's images. Batch-drop your JPGs, set quality (85% is the sweet spot), and compare the before/after sizes per file. All conversion happens locally in your browser.
Frequently asked questions
Both formats are lossy — am I double-compressing?
Technically yes, so don't round-trip repeatedly. One conversion at 85%+ quality is visually transparent; keep your original JPGs as masters and serve the WebPs.
Should I use WebP or AVIF?
AVIF compresses even harder but encodes slowly and support is newer. WebP is the pragmatic default in 2026; AVIF is worth it for high-traffic hero images.