PNG vs JPG vs WebP — Which Format Should You Actually Use?

Every image format decision on the web is a trade-off between file size, quality, transparency support, and browser compatibility. Picking the wrong format doesn't break anything visibly — it just quietly makes your pages heavier than they need to be, which costs you load speed, Core Web Vitals scores, and ultimately rankings.

Convert between formats instantly using our PNG to JPG and PNG to WebP tools.

JPG uses lossy compression — it permanently discards image data to reduce file size. The compression is tuned to human perception, discarding details the eye is least likely to notice. For photographs with millions of gradual colour transitions, this works extremely well.

Use JPG for: product photography, hero images, blog post photos, any photo-realistic content where file size matters.

Avoid JPG for: logos, screenshots, images with text, flat colour graphics, anything that needs transparency. JPG compression creates visible artefacts around hard edges and text.

Quality setting: 75-85% is the sweet spot for most web use. Below 70% artefacts become visible. Above 90% the file size increase is not worth the marginal quality gain.

PNG uses lossless compression — no data is discarded, every pixel is preserved exactly. This makes PNG files significantly larger than JPG for photographic content, but perfect for images where accuracy matters.

Use PNG for: logos, icons, screenshots, UI elements, images with transparent backgrounds, any graphic where hard edges and flat colours need to be pixel-perfect.

Avoid PNG for: photographs and photorealistic images. A PNG photograph is typically 3-5x larger than an equivalent JPG at acceptable quality.

PNG-8 vs PNG-24: PNG-8 supports only 256 colours with binary transparency. PNG-24 supports millions of colours with full alpha transparency. For web use, PNG-24 is almost always what you want.

WebP was developed by Google and offers both lossy and lossless compression modes. In lossy mode it typically achieves 25-35% smaller files than JPG at equivalent visual quality. In lossless mode it achieves 20-30% smaller files than PNG. It also supports transparency in both modes.

Browser support: 97%+ of global browsers as of 2024. The main exception is very old iOS Safari (pre-14). For most production sites, WebP should be your default format.

Use WebP for: everything, with JPG/PNG as fallback for older browsers if your audience requires it.

Photographs → JPG (or WebP lossy) Logos and graphics → PNG (or WebP lossless) Transparent images → PNG (or WebP) Everything modern → WebP with JPG/PNG fallback Animated images → use video formats (MP4/WebM) instead of GIF