Image Format Comparison

JPG vs PNG: Which Format Should You Use?

JPG and PNG are the two most common image formats on the web, but they serve very different purposes. JPG uses lossy compression to keep photo files small at the cost of some quality, while PNG uses lossless compression to preserve every pixel, at the cost of larger files. Picking the wrong one means either bloated page loads or ugly artifacts — choosing correctly is one of the highest-impact, lowest-effort optimizations you can make.

JPGvsPNG

Quick Verdict

Use JPG when…

Use JPG when you're sharing photos, uploading to social media, or publishing images on the web where file size matters and you don't need transparent backgrounds.

Use PNG when…

Use PNG when you need transparency (logos, icons, screenshots with UI elements), when you'll re-edit the file multiple times, or when pixel-perfect quality is non-negotiable.

JPG vs PNG: Feature Comparison

Feature	JPG	PNG
Compression	Lossy — permanently discards some detail	Lossless — retains every pixel exactly
Transparency	Not supported — white or color fill instead	Full alpha channel transparency
Best for	Photos, gradients, complex scenes	Logos, icons, screenshots, graphics with text
Typical file size	Small (50–300 KB for a web photo)	Large (200 KB–2 MB for the same image)
Browser support	Universal — every browser and device	Universal — every browser and device
Quality on re-save	Degrades each time you save (generation loss)	Stays identical — no generation loss

When JPG wins

✓Compression: Lossy — permanently discards some detail
✓Transparency: Not supported — white or color fill instead
✓Best for: Photos, gradients, complex scenes

When PNG wins

✓Compression: Lossless — retains every pixel exactly
✓Transparency: Full alpha channel transparency
✓Best for: Logos, icons, screenshots, graphics with text

Frequently asked questions

Does JPG always look worse than PNG?

Not in practice. For photographs, a JPG at quality 85–90 is visually indistinguishable from PNG but 5–10× smaller. PNG only wins visually when the image has sharp edges, flat colors, or text — like screenshots or logos.

Can I convert JPG to PNG without losing quality?

You can, but the damage from JPG's lossy compression is already baked in — converting to PNG won't recover lost detail. It will, however, prevent further quality loss on future saves.

Which format should I use for a website logo?

PNG (or better, SVG). Logos have flat colors, sharp edges, and usually need a transparent background — all things where PNG excels and JPG struggles.

Why does my PNG look huge compared to my JPG?

PNG's lossless compression is much less aggressive than JPG's lossy method. A photo saved as PNG can be 10–20× larger than the same photo saved as JPG at high quality.