The short answer
| Purpose | Consider first | Why |
|---|---|---|
| General photos | JPG or WebP | Efficient for varied color and tone |
| Website images | WebP | Lossy, lossless and transparency options |
| Transparent background | PNG or WebP | Alpha transparency |
| UI screenshots | PNG or WebP | Preserves text and hard edges |
| Maximum compatibility | JPG or PNG | Broad support in older workflows |
JPG is built for photographic detail
JPG uses lossy compression: it discards some visual information to store a smaller file. It is effective for portraits, travel photos and product photography with many gradual color changes.
Hard edges, tiny text and flat-color logos can reveal compression artifacts. JPG also has no transparent background, so transparent areas need a solid color.
- Strong choice for photos
- Lower quality usually means a smaller file and more loss
- No alpha transparency
- Very broad compatibility
PNG preserves hard edges and transparency
PNG can compress pixel data without image loss, which suits screenshots, diagrams, icons and transparent graphics. Re-saving a PNG does not add JPEG-style loss.
A complex photograph can be much larger as PNG. Lossless does not automatically mean the most useful output; the extra bytes should preserve something you need.
WebP is flexible for web delivery
WebP supports lossy and lossless compression as well as transparency. That makes it practical for serving photos, thumbnails and transparent graphics on modern websites.
JPG or PNG may remain simpler for archives and some editing workflows. Always open the converted result in the environment where it will be used and compare both appearance and file size.
The same pixels can need a different format
| Situation | Starting point | Check |
|---|---|---|
| Travel photo | JPG/WebP | Gradients and fine texture |
| Product image | WebP/JPG | Use PNG/WebP if transparency matters |
| Company logo | PNG/WebP | Keep the vector master separately |
| UI screenshot | PNG/WebP | Text edges and small icons |
| Messenger sharing | JPG/WebP | Recipient compatibility and recompression |
Changing format does not restore lost quality
Converting a low-quality JPG to PNG cannot reconstruct details already discarded by JPEG compression. The PNG only stores the pixels that remain.
Repeatedly saving through a lossy format can add more damage. Keep an important master and create separate delivery copies.
Compare the actual result
Only My Kit can create JPG, PNG and WebP copies, while Image Compress adjusts JPG or WebP quality. Review the result and its size before replacing a delivery file.
Different colors and textures compress differently, so no honest percentage applies to every image.
FAQ
- Is PNG higher quality than JPG?
- PNG is lossless, but it is not always more practical for photos. JPG or WebP can provide sufficient visual quality at a much smaller size.
- Which formats support transparency?
- PNG and WebP support transparency. JPG does not.
- Does JPG-to-PNG improve sharpness?
- No. Conversion cannot recover information already lost.