JPG vs PNG vs WebP: Image Format Comparison
JPG, PNG, and WebP are three of the most commonly used image formats. Each format has different strengths, and the best choice depends on the type of image, required quality, file size, and where the image will be used.
Quick comparison
| Feature | JPG | PNG | WebP |
|---|---|---|---|
| Compression | Lossy | Lossless | Lossy / Lossless |
| Transparency | No | Yes | Yes |
| Typical use | Photos | Graphics and screenshots | Web images |
| Compatibility | Very broad | Very broad | Broad in modern software |
JPG
JPG is one of the most widely supported image formats. It uses lossy compression, which allows photographs and other detailed images to be stored in relatively small files.
JPG is usually a practical choice for photographs, travel pictures, product images, and other images where keeping the file size manageable is important.
The main limitation is that JPG does not support transparent backgrounds and repeated lossy processing can reduce image quality.
Convert PNG to JPG →PNG
PNG uses lossless compression and is commonly used when preserving sharp details is more important than minimizing file size.
Screenshots, logos, interface graphics, diagrams, and images with transparent backgrounds are common examples where PNG can be a useful choice.
The trade-off is that PNG files can be considerably larger than compressed JPG or WebP files, particularly for photographic images.
Convert JPG to PNG →WebP
WebP is a modern image format designed with efficient web delivery in mind. It supports both lossy and lossless compression and can also support transparency.
WebP can be useful for websites because reducing image file size can reduce the amount of data visitors need to download.
However, compatibility should still be considered when working with older software, applications, or systems that expect more traditional image formats.
Convert JPG to WebP →Which format should you use?
Choose JPG for photographs
JPG is often a good choice when working with photographs and when broad compatibility and reasonable file size are important.
Choose PNG for graphics and transparency
PNG is often more appropriate for screenshots, logos, diagrams, and graphics where sharp details or transparency are important.
Choose WebP for modern web use
WebP is a strong option when efficient image delivery is a priority and the software or platform supports the format.
Real file size comparison
We created two test images and converted each image to JPG, PNG, and WebP using fixed encoding settings. The results show how strongly image content can affect the final file size.
| Test image | JPG | PNG | WebP |
|---|---|---|---|
| Landscape | 372.0 KB | 2,332.3 KB | 277.0 KB |
| UI screenshot | 94.2 KB | 16.6 KB | 23.2 KB |
Test conditions: JPG quality 85, WebP quality 85, and PNG lossless compression. File sizes will vary depending on the source image, dimensions, and encoding settings.
Landscape test
The landscape test image is 1920 × 1280 pixels. It contains gradients, mountains, vegetation, and water to represent a photographic image with varied visual detail.
Original image — 1920 × 1280 pixels
JPG
372.0 KB
PNG
2,332.3 KB
WebP
277.0 KB
Result
WebP produced the smallest file in this test at 277.0 KB, followed by JPG at 372.0 KB. PNG was substantially larger at 2,332.3 KB.
UI screenshot test
The second test image is a 1920 × 1080 user-interface screenshot containing large areas of solid color, charts, lines, and sharp graphical elements.
Original image — 1920 × 1080 pixels
JPG
94.2 KB
PNG
16.6 KB
WebP
23.2 KB
Result
The screenshot produced a different result. PNG was the smallest at 16.6 KB, followed by WebP at 23.2 KB. JPG was the largest at 94.2 KB.
This demonstrates why the smallest format depends on the type of image. A format that performs well for photographs may not produce the smallest file for screenshots or graphics.
Image quality comparison
Image quality should not be judged only by the file extension. Compression settings, image dimensions, and the original image all affect the final result.
A highly compressed JPG can show visible artifacts, while a carefully encoded JPG can still look excellent. Similarly, WebP can produce different results depending on whether lossy or lossless compression is used.
For graphics containing text and sharp edges, PNG can often preserve details particularly well because it uses lossless compression.
Related image converters
Frequently Asked Questions
Which format is best for photos?
JPG is a common choice for photographs because it provides broad compatibility and can keep file sizes relatively manageable.
Which format supports transparency?
PNG and WebP can support transparency, while standard JPG images do not.
Is WebP always smaller than JPG or PNG?
No. File size depends on the image and compression settings. WebP can be very efficient, but there is no guarantee that every WebP file will be smaller.