PNG vs JPG for Web: Which Should You Use?
Compare PNG vs JPG for web use, including transparency, file size, compatibility, and when it makes sense to convert PNG to JPG instead.
PNG and JPG are often framed as a simple format choice, but the right answer depends on whether the image needs transparency, whether it behaves like a photo, and how much file size matters for delivery. A good web guide should make that decision fast instead of turning it into a generic format lecture.
What PNG still does better
PNG remains the safer choice for transparency, crisp UI graphics, and assets where compression artifacts would be obvious along sharp edges. That makes it useful for logos, product UI captures, and other graphics that should stay visually clean.
The trap is assuming PNG is the best option for every exported image. Many people keep photos or marketing visuals as PNG simply because that is how they were handed the asset, even when the format is adding weight with little benefit.
Where JPG becomes the better web choice
JPG is usually the more efficient delivery format for photographs and other visual content where transparency is irrelevant. Its role on the web is not to destroy quality. It is to keep image weight under control for assets that do not need PNG's extra precision.
That also explains why converting a PNG to JPG can be the right move even when the source started as PNG. If the output job is web delivery and transparency is unnecessary, JPG often wins the practical tradeoff.
A quick way to decide
Use a quick rule instead of overthinking it. Keep PNG when transparency or crisp graphic fidelity matters. Switch to JPG when the image behaves more like a photo and lighter delivery matters more than exact pixel preservation.
That framing usually gets you to the right answer quickly without overthinking the format choice.