JPG vs PNG: When to Use Each Image Format
Use JPG for photographs where file size matters — it produces 5–10× smaller files than PNG with little visible quality loss. Use PNG for logos, screenshots, and any image requiring transparency, since PNG is lossless and preserves every pixel.
JPG vs PNG — Feature Comparison
| Attribute | JPG | PNG |
|---|---|---|
| Compression Neither wins — it depends on use case. | Lossy | Lossless |
| File size for photos | Much smaller | Very large |
| File size for graphics/logos | Often larger (artefacts) | Smaller |
| Transparency | No | Yes (8-bit alpha) |
| Quality after re-saves Each JPEG re-save introduces new artefacts. | Degrades (generation loss) | No degradation |
| Colour depth | 8-bit (16.7M colours) | Up to 48-bit |
| Browser support | Universal | Universal |
| Best for | Photos, complex scenes | Logos, UI, screenshots |
When to Use Each
Choose JPG when…
Use JPG for photographs and complex images where smaller file size is more important than perfect quality.
Choose PNG when…
Use PNG for logos, icons, UI graphics, and any image that needs transparency or will be edited repeatedly.
Frequently Asked Questions
Can PNG ever be smaller than JPG?
Yes — for images with large areas of flat colour (logos, diagrams, text screenshots), PNG compression can produce smaller files than JPEG. JPEG is only better for photographic content with complex colour gradients.
Does converting JPG to PNG improve quality?
No. PNG is lossless, but converting a JPEG to PNG cannot recover quality already lost during JPEG compression. It simply stores the existing pixels losslessly, producing a larger file with no quality gain.
Which format is better for SEO?
For photographs, JPG is better because smaller files load faster. For logos and icons, PNG or SVG are preferable. For modern web, consider WebP or AVIF for both use cases — they outperform both JPG and PNG in compression.
Related Developer Tools
Related Comparisons
PNG vs WebP
WebP delivers 25–35% smaller files than PNG while supporting both lossless and lossy compression. Compare PNG vs WebP across file size, transparency, browser support, and use cases.
WebP vs AVIF
AVIF offers 20–50% better compression than WebP, but encodes slower and has slightly lower browser support. Learn when to choose AVIF vs WebP for your web images.