PNG vs JPG: Which Image Format Should You Use?
PNG or JPG? The right choice depends on transparency, file size, and whether it's a photo or a graphic. Here's a simple rule you'll never forget.
PNG vs JPG is one of the most common questions in image editing — and the answer is simpler than it looks. In one line: use JPG for photographs, and PNG for graphics, logos, screenshots, and anything that needs transparency. This guide explains why, so you'll always know which to pick — and how to convert between them free when you need to.
The one-line rule
JPG (JPEG) uses *lossy* compression: it throws away detail the eye barely notices to make photos dramatically smaller. That's perfect for photographs, where a 5 MB image can become 400 KB with no visible difference.
PNG uses *lossless* compression and supports transparency. It keeps every pixel exactly, which is ideal for sharp-edged graphics — logos, icons, screenshots, text — but produces much larger files for photos.
So: photo → JPG. Graphic, logo, screenshot, or needs transparency → PNG.
Transparency: the deciding factor
The single biggest difference is transparency. PNG can have a transparent background; JPG cannot. A JPG always fills the background with a solid colour (usually white).
This is why logos and cut-out product images are almost always PNGs — you can drop them onto any background. If you convert a transparent PNG to JPG, the transparent areas turn white. If you need the image on a website over a coloured background, keep it PNG (or WebP).
File size: JPG usually wins for photos
For a typical photograph, a JPG is often 5–10× smaller than the same image as a PNG, at no visible quality cost. That makes JPG the right choice for photos on websites, in emails, and anywhere loading speed matters.
For a simple graphic with flat colours (like a logo), PNG can actually be smaller *and* sharper than JPG — and JPG would add ugly artefacts around crisp edges and text. So the "smaller" answer flips depending on the content.
Quality: lossy vs lossless
Because JPG is lossy, re-saving a JPG repeatedly slowly degrades it (each save throws away a little more). PNG is lossless, so it never degrades no matter how many times you save it — which is why it's preferred for editing masters and screenshots where text must stay razor-sharp.
Rule of thumb: edit in a lossless format (PNG) if you'll re-save often; export to JPG at the very end for a small, shareable photo.
How to convert PNG to JPG (or JPG to PNG) free
Converting is instant:
1. Open JPT AI's converter at sjpt.io.
2. Upload your image.
3. Pick the output format — JPG or PNG.
4. Download.
No watermark, no sign-up, and it runs in your browser so your image stays private. Converting PNG → JPG shrinks a photo; JPG → PNG gives you a lossless copy (though it won't add transparency that wasn't there).
Frequently asked questions
Which is better, PNG or JPG?Neither is universally better — JPG is better for photos (small files), PNG is better for graphics, logos, screenshots and transparency.
Does converting PNG to JPG lose quality?JPG is lossy, so there's a small, usually invisible quality trade-off in exchange for a much smaller file. Transparency is lost (filled white).
Can a JPG have a transparent background?No. Only PNG (and WebP) support transparency. A JPG always has a solid background.
Is WebP better than both?WebP is a modern format that's often smaller than JPG and supports transparency like PNG — great for websites. It's less universally supported in old apps, though.
Key takeaways
Remember the one-liner: photos → JPG, graphics/logos/screenshots/transparency → PNG. JPG wins on size for photographs; PNG wins on sharpness and transparency for graphics. When you need to switch, JPT AI's free converter does it in seconds with no watermark. Convert Image Free →
