Pick the wrong image format and you either end up with files three times larger than necessary, or images that look degraded. This guide gives you a clear answer for every situation.
The Three Formats Explained
JPG (JPEG)
JPG is the most widely used format for photographs. It uses lossy compression, which means some image data is permanently discarded to make the file smaller. At quality 85%, the result looks identical to the original for most people. Every device and application on the planet supports JPG.
The downside: JPG degrades slightly each time you save it. It also cannot store transparent backgrounds. Text and sharp geometric shapes look blocky at lower quality settings.
PNG
PNG uses lossless compression, storing every pixel exactly. This makes it ideal for logos, screenshots, graphics with text, and anything that needs a transparent background. A PNG will look identical to the original no matter how many times you save it.
The downside: PNG files are 3-10 times larger than JPG for the same photograph. Photographs saved as PNG are unnecessarily large.
WebP
WebP is a modern format developed by Google. It supports both lossy and lossless compression, produces files 25-35% smaller than JPG at equivalent quality, and also supports transparency like PNG. Browser support reached 95% of global users by 2024.
The downside: WebP is not supported by some older software, including older versions of Photoshop and most email clients. If you need maximum compatibility, JPG is safer.
Side-by-Side Comparison
| Feature | JPG | PNG | WebP |
|---|---|---|---|
| Best for photos | ✅ Yes | ⚠️ Very large | ✅ Smaller than JPG |
| Transparency support | ❌ No | ✅ Yes | ✅ Yes |
| File size (photo) | Medium | Large | Small |
| File size (graphic) | Medium | Small | Smaller |
| Lossless option | ❌ No | ✅ Always | ✅ Yes |
| Browser support | Universal | Universal | 95%+ |
| Email client support | Universal | Universal | Limited |
| Photoshop support | Universal | Universal | 2022+ |
| Quality loss on re-save | Yes | No | Lossy version: yes |
When to Use Each Format
Use JPG when:
- You are sharing photographs and need universal compatibility
- You are uploading to social media, email, or any platform where WebP might not render
- You need your file to open in any application, including older software
- File size matters and the image does not need transparency
Use PNG when:
- Your image has a transparent background (logos, icons, product cutouts)
- You are saving a screenshot or image with text where sharpness is critical
- You will edit the image many more times and cannot afford quality loss
- You are creating graphics with flat colors and sharp edges
Use WebP when:
- You are serving images on a website and file size directly impacts load speed
- Your audience uses modern browsers (Chrome, Firefox, Safari, Edge all support it)
- You want the smallest file size for a photograph without visible quality loss
- You need transparency but also want a smaller file than PNG
For websites, use WebP as your primary format with a JPG fallback using the HTML picture element. This gives modern browsers the smaller WebP while older browsers get JPG.
A Word on AVIF
AVIF is an emerging format that can be 20-30% smaller than WebP at the same quality. Browser support reached about 90% of users in 2025. If you are building a modern website and want the smallest possible images, AVIF is worth exploring. For general use, WebP is still the better-supported choice in 2026.
Format Verdict by Use Case
Profile photo for social media
Use JPG. Universal compatibility. Convert your image using our Image Resizer to the right dimensions first.
Logo or icon
Use PNG. Lossless quality, sharp edges, transparent background support. Convert JPG to PNG if needed.
Website product image
Use WebP. 25-35% smaller than JPG. Compress first with our Image Compressor set to WebP output.
Screenshot
Use PNG. Lossless preserves text sharpness. JPG adds artifacts around text at lower quality settings.
Photography portfolio
Use JPG or WebP. JPG for maximum compatibility. WebP if your site specifically serves modern browsers.
Email attachment
Use JPG. WebP is not supported by most email clients. Compress the JPG to stay under size limits.
Quick Conversions
Need to switch formats? Our free tools handle it instantly, entirely in your browser:
- Convert JPG to PNG - for transparency and lossless editing
- Convert PNG to JPG - for smaller file sizes
- Convert WebP to JPG - for maximum compatibility
- Compress to WebP - for smaller web images