JPG vs PNG vs WebP: Which Image Format Is Best?

JPG, PNG, and WebP are all common on the web, and they are not interchangeable. A format is a set of rules for storing pixels. The best one depends on whether the image is a photo, a graphic, or a picture that needs a clear background.

This site accepts those three formats and can keep the original or convert to another. Conversion is real: the download’s file type matches the format you select. It still does not guarantee a smaller file.

JPG

JPG, also written JPEG, is built for photographs. It uses lossy compression. Lower quality removes more fine detail. Repeated saves can make the damage more obvious, so edit from an original when you can.

JPG does not support transparency. On this site, a clear area becomes white when you save a JPG. That is the right behavior for a photo on a white page, and the wrong behavior for a logo that should float on any background.

The name can be .jpg or .jpeg. Both are the same format here.

PNG

PNG is a strong choice for screenshots, diagrams, icons, and other graphics with flat color or sharp text. At 100% quality, this tool writes a PNG that keeps all colors. The file may not shrink.

Below 100%, PNG uses fewer colors. That is a different mechanism from JPG quality. It can posterize a photo. A PNG that already contains transparency keeps every color, because reducing the palette can damage the clear edge. The quality slider does not apply to that file.

PNG files are often larger than JPG photos of the same scene. That is a reason to avoid PNG for large photographs, not a reason to avoid it for a logo.

WebP

WebP can store photographs and graphics, and it can keep transparency. The WebP export in this tool is lossy: lower quality removes more detail, while clear areas stay clear.

WebP is widely supported in current browsers. If you must support a very old browser, keep a JPG or PNG fallback in your own page. This compressor creates one file per export, not a set of fallbacks.

A WebP file is not automatically smaller than the JPG you started with. Compare the byte sizes after you compress.

Side-by-side comparison

How the three formats behave in this tool

When to use each one

Choose JPG for a photograph that sits on a solid background and does not need a clear edge.

Choose PNG for a logo, icon, diagram, or screenshot, especially when text must stay sharp or the background must stay clear.

Choose WebP when you want a modern file for a photo or a transparent graphic and you have checked that your audience’s browsers can show it.

If you are unsure, keep the original format, compress, and compare. Switch only when the new file is both acceptable to look at and actually smaller, or when you need a feature the old format lacks.

A useful check is to export the same photo twice: once as JPG at 75% and once as WebP at 75%. Open both results, note the byte sizes, and zoom to 200%. Keep the file that stays clear at the size you will display. Do the same for a logo, using PNG at 100% and WebP, and look at the corners that should stay transparent. The winner can be different for those two pictures, which is why a single house format is a weak rule.

Convert a file

1. Add the image in the compressor.
2. Open Advanced Settings and set Output format to JPG / JPEG, PNG, or WebP. “Keep original format” leaves each file as it is.
3. Set quality. For PNG, remember that 100% keeps colors and lower values reduce the palette, except on a transparent PNG.
4. Compress and open Compare Image Quality.
5. Check the format line on the result, not only the file name.
6. Download. The extension follows the format you chose. A ZIP of several conversions uses each image’s output format.

Changing the format after a compression marks the old result as stale. Compress again before you download.

Questions

Is WebP always better than JPG?

No. WebP is often efficient, and it can keep transparency, but you still need to compare the specific file. Some images save little or get larger.

Should screenshots be JPG?

Usually no. JPG can blur text. PNG or a careful WebP export is easier to read.

What happens to a transparent background in JPG?

It is filled with white. Use PNG or WebP if the clear area has to remain clear.

Does converting reduce quality by itself?

Moving into a lossy format can. Moving a photo into a lossless PNG keeps the pixels you decoded, but the file often grows. Look at the comparison, not the format name alone.

Can I convert several images to the same format?

Yes. Choose JPG, PNG, or WebP before you compress the batch. Every image in that run uses that output format.

Pick the format for the picture you have

Use JPG for ordinary photos, PNG for sharp or transparent graphics, and WebP when you want a modern file and have compared the result. Quality settings are explained in compress images without losing quality. Size limits are covered in reduce image size to 100KB or 200KB. Page-level choices are in image optimization for SEO.