PNG vs JPG vs WebP: Which Image Format Should You Use?

The quick comparison

PNG: lossless, and built for transparency

PNG (Portable Network Graphics) uses lossless compression, meaning it shrinks a file's size without discarding any image data — decompress it and you get back exactly the same pixels you started with, no matter how many times you open and re-save it. That makes PNG the right choice any time exact accuracy matters: text needs to stay crisp, a logo's edges need to stay clean, or a screenshot needs to remain perfectly readable.

PNG's other defining feature is alpha transparency — the ability for parts of an image to be partially or fully see-through. This is why logos, icons, and any image meant to sit on top of a colored or patterned background are almost always PNGs.

The trade-off: because it doesn't throw anything away, PNG produces much larger files than JPG for photographic images with lots of color variation and detail. Using PNG for a full-resolution photo instead of JPG can easily mean a file 3-5x larger for very little visible benefit.

Use PNG for:

• Logos and icons
• Screenshots, especially ones with text
• Graphics that need a transparent background
• Images you plan to edit repeatedly (no quality loss on re-saving)

JPG: smaller files, built for photos

JPG (or JPEG) uses lossy compression — it selectively discards image data that the human eye is less likely to notice, which is what allows it to shrink photographic images so dramatically compared to PNG. The trade-off is right there in the name: some quality is genuinely lost, and it's cumulative — re-saving the same JPG repeatedly will very slowly degrade it further each time, an effect sometimes called "generation loss."

JPG doesn't support transparency at all; any transparent area gets filled with a solid color (usually white) when converting to JPG. It also tends to show visible "compression artifacts" — blocky or blurry patches — around sharp edges and fine text, which is exactly why it's a poor choice for graphics and screenshots even though it excels at photos.

Use JPG for:

• Photographs of people, places, and objects
• Any image where a smaller file size matters more than pixel-perfect accuracy
• Email attachments and situations with upload size limits

WebP: a modern format built for the web

WebP is a newer format developed specifically to replace both PNG and JPG for web use. It supports both lossy and lossless compression modes, and — unlike JPG — it also supports transparency, which makes it genuinely more flexible than either of the older formats. In most real-world comparisons, WebP produces meaningfully smaller files than PNG or JPG at an equivalent visual quality, which is exactly why so many websites have adopted it: smaller images mean faster page loads.

The one real limitation is compatibility — while all modern browsers support WebP now, some older software, certain print workflows, and a handful of platforms still expect a traditional PNG or JPG upload. If you're building a website, WebP is usually the better default. If you're sending a file somewhere you're not sure will accept it, PNG or JPG remains the safer bet.

Use WebP for:

• Website images, to improve page load speed
• Anywhere you'd use PNG or JPG, if you know the destination supports it
• Images that need both small file size and transparency

A simple way to decide

• Is it a photo? Use JPG, or WebP if you know it'll be viewed on the web.
• Does it need a transparent background? Use PNG, or WebP if the destination supports it.
• Is it a screenshot, logo, or has text in it? Use PNG to keep edges and text sharp.
• Are you optimizing a website for speed? Use WebP wherever you can.
• Not sure if somewhere will accept the format? PNG and JPG are the two safest, most universally supported choices.