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WebP vs PNG file size: 0.07 MB vs 2.89 MB for the same graphic (JPEG: 0.24 MB)
How much smaller is WebP than PNG?
The same 1792x2240 flat-color graphic was 2.89 MB as PNG, 0.24 MB as JPEG (q85) and 0.07 MB as WebP (q80).
Results
| PNG | 2.89 MB |
|---|---|
| JPEG q85 | 0.24 MB |
| WebP q80 | 0.07 MB |
How it was measured
cwebp -q 80 and Pillow JPEG q85.
cwebp -q 80 in.png -o out.webpWhy
Flat colors compress extremely well in lossy formats.
When this does not apply
Photos shrink less; check quality by eye.
Environment
MacBook Air (Apple silicon, 8 cores), macOS. Measured 2026-10-12.
Source: shorts/demo-ticket/w2 in my content-engine repository. Treat any single run as a direction; re-run it on your hardware.
By Josué Barros, senior software engineer (full-stack, data and AI).