JPG, PNG and WebP are common image formats, but they solve different problems. Choosing based on image content can reduce file size while preserving the details that matter. There is no single best format for every image.
JPG: practical for photographs
JPEG uses lossy compression and is widely supported. It is a common choice for photographs with smooth colour transitions. It does not support transparency, and repeated editing and saving can introduce artifacts.
PNG: sharp graphics and transparency
PNG uses lossless compression and supports transparency. It suits logos, interface screenshots, diagrams and graphics with crisp edges. Detailed photographs can be much larger as PNG than as JPEG or WebP.
WebP: a web-focused format
WebP supports lossy and lossless compression and transparency. It is useful for web delivery, but check the software or service receiving the image before converting.
Quick format guide
- Photographs: start with JPG or lossy WebP.
- Transparent logos: use PNG or lossless WebP.
- Screenshots with small text: PNG often preserves crisp edges.
- Website assets: compare WebP with the current format at acceptable quality.
Convert images
Use the Image Converter, or the dedicated JPG to PNG and PNG to JPG tools. Converting JPG to PNG does not restore detail already lost through JPEG compression.
What happens to transparency?
JPEG cannot store transparent pixels. When a transparent PNG is converted to JPG, transparent areas must be filled with a solid background. Preview the result to make sure the background is suitable.
Think about transparency and editing
JPG does not support transparent pixels. If a transparent PNG is converted to JPG, transparent areas must be filled with a solid background colour. PNG can preserve transparency and sharp edges, but photographs saved as PNG may be much larger than necessary. WebP supports transparency as well as lossy and lossless compression, although the applications receiving the file must support it.
A practical selection checklist
- Choose JPG for ordinary photographs when broad compatibility and compact size matter.
- Choose PNG for screenshots, diagrams, logos and assets that need transparency or pixel-sharp edges.
- Choose WebP for website delivery when the publishing platform and target browsers support it.
- Keep a high-quality original before converting or repeatedly re-saving an image.
Changing a file extension does not convert its image data. Use an actual converter, then open the exported file to confirm its format, appearance and transparency.
FAQs
Is PNG higher quality than JPG?
PNG preserves pixel data losslessly; JPG is lossy. The best choice depends on content and use. A well-encoded JPG photo can look excellent at a smaller size.
Does JPG to PNG improve quality?
No. It changes the container format but cannot restore information discarded by JPEG compression.
Can JPG have a transparent background?
No. Use PNG or WebP when transparency is required.
Should every website image be WebP?
Not necessarily. Consider compatibility, transparency, workflow and actual file-size comparisons.
Try the related tool
Use the Image Converter. Check the tool page for accepted formats and processing details, and keep an original copy of important files.
Educational guide. Supported formats and results may vary by browser and device.
Guide content reviewed: 5 November 2026.