PNG Image Format: Complete Guide
.pngLossless format with transparency support. Files use the .png extension (image/png) and run in 100% of browsers.
PNG is lossless: every pixel survives intact, which is why files run larger. It supports transparent backgrounds. It stores still images only.On size: compact for flat graphics and screenshots, large for photographs.
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Master Guide
PNG Optimization: Transparency Done Right
Advantages
- ✓Lossless quality
- ✓Transparency support
- ✓Universal support
Limitations
- ✗Large file sizes
- ✗Not ideal for photos
When to Use PNG
- •Logos
- •Icons
- •Screenshots
- •Graphics with text
Technical Details
| File Extension | .png |
| MIME Type | image/png |
| Compression | Lossless only |
| Transparency | Yes |
| Animation | No |
| Typical size | compact for flat graphics and screenshots, large for photographs |
| Browser Support | 100% |
PNG FAQ
Is PNG better than JPEG?
Depends on the job. PNG is lossless format with transparency support, and compact for flat graphics and screenshots, large for photographs. JPEG still wins when you need guaranteed support everywhere, such as in email clients or legacy software.
Does PNG support transparent backgrounds?
Yes. PNG stores an alpha channel, so logos, icons, and cut-out graphics keep their transparent areas intact.
How large is a typical PNG file?
compact for flat graphics and screenshots, large for photographs. Actual size always depends on image content and quality settings — a detailed photograph and a flat two-color logo in the same format can differ by an order of magnitude.