JPG vs PNG vs WebP: Which Image Format Should You Use?
6 min read · April 2026
The three formats dominate modern digital imaging — JPG for photographs, PNG for graphics with transparency, and WebP as the newer alternative that promises smaller files at the same quality. But picking the wrong one for your use case costs you either file size, visual quality, or compatibility.
Here's the complete picture, explained without jargon.
JPG (JPEG) — the photo format
JPG uses lossy compression: it discards some image data to reduce file size. The algorithm is tuned for photographic content — gradients, skin tones, skies, complex natural scenes — where small losses are imperceptible to the human eye.
File sizes: Small to medium. A 12-megapixel photo at 85% quality is typically 2–4 MB. At 70% quality it's 1–2 MB with minimal visible difference.
Transparency: Not supported. If you export a logo with a transparent background as JPG, the transparent areas become white (or the background colour of the canvas).
Use JPG for: Photographs, product images, hero banners, any image where file size matters and transparency isn't needed. Nearly universal support everywhere.
PNG — the graphics format
PNG uses lossless compression — every pixel is stored exactly. This makes it larger than JPG for photographs, but it's the only sensible choice for images that need pixel-perfect precision: logos, icons, screenshots, diagrams, and anything with text.
File sizes: Larger than JPG for photos (a 12MP photo in PNG is 15–25 MB), but competitive for flat-colour graphics (a logo might be 30 KB as PNG vs 80 KB as JPG with visible compression artifacts).
Transparency: Full alpha channel support. PNG is the standard format for logos, icons, and any image that needs to sit on different coloured backgrounds.
Use PNG for: Logos, icons, illustrations, screenshots, diagrams, UI elements, anything with transparency. Never use PNG for photographs on the web — the file size is wasteful.
WebP — the modern web format
Google developed WebP in 2010 as a replacement for both JPG and PNG on the web. It supports both lossy compression (like JPG) and lossless compression (like PNG), plus full transparency. The resulting files are typically 25–35% smaller than JPG at equivalent quality.
File sizes: Smaller than both JPG and PNG for equivalent quality. A photograph that is 3 MB as JPG is typically 1.8–2.2 MB as WebP.
Transparency: Supported in WebP — which means it can replace PNG for icons and logos with smaller files.
Browser support: All modern browsers (Chrome, Firefox, Safari 14+, Edge) support WebP. If you need to support very old browsers or share images via email, WhatsApp, or older apps, JPG/PNG are safer.
Use WebP for: Images on websites and web apps where you control the environment. Best for improving page load speeds without sacrificing quality.
Quick reference: which format to use
| Use case | Best format |
|---|---|
| Photo for web page | WebP (or JPG) |
| Logo / icon with transparency | PNG (or WebP) |
| Photo to share via email / WhatsApp | JPG |
| Screenshot of an app or website | PNG |
| Image for print | JPG (high quality) |
| Web app UI element (button, illustration) | WebP or SVG |
| Technical diagram with text labels | PNG |
Converting between formats
Need to convert an image from one format to another? JustConvert offers direct conversion between all major formats:
- JPG to WebP — shrink web images by 25–35%
- PNG to WebP — smaller logos and icons for the web
- WebP to JPG — for maximum compatibility with older apps
- JPG to PNG — when you need lossless quality or transparency
- PNG to JPG — when you need a smaller photo without transparency