PNG and JPG serve completely different purposes. Using the wrong one can mean files 10x larger than necessary — or visibly degraded quality. Here's exactly when to use each.
| Image Type | PNG Size | JPG Size (85%) | Savings |
|---|---|---|---|
| Photo (1920×1080) | 4.2 MB | 312 KB | 93% |
| Screenshot with text | 847 KB | 289 KB (blurry) | Use PNG |
| Logo with transparency | 24 KB | N/A (no alpha) | Use PNG |
| Web graphic | 156 KB | 98 KB (banding) | Use PNG |
Photos → JPG or WebP. The file size savings are massive (80-95%), and the quality difference is invisible to the human eye at 85%+ quality.
Graphics, logos, screenshots, text → PNG. JPG compression creates visible artifacts around sharp edges and text.
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