Compare JPEG and WebP exports for a photo, consider transparency and destination support, and choose the version that balances size and appearance.
Let the destination narrow your choices
Before comparing file sizes, check which formats your intended destination accepts. A smaller file is unhelpful when a form or editor refuses it. JPEG is a common photo-delivery format, while WebP may be suitable when the receiving application supports it.
ToolNivo Image Compressor offers both as output choices. It does not verify the requirements of another website. Keep the source until you have confirmed that the chosen export can be opened or submitted where you need it.
Compare exports from the same source
Select the original photo, choose JPEG and generate a result at a moderate quality setting. Note the displayed size and inspect the preview. Then choose WebP and generate a second result from the same selected source.
Use the same source for both comparisons rather than compressing the JPEG result into WebP. That avoids adding an unnecessary generation of lossy encoding. The same slider value does not make the two formats visually identical, so compare the actual outputs instead of only matching the number.
Watch what happens to transparency
If the input contains transparent pixels, JPEG fills them with white in this tool. A transparent logo intended for a colored background may therefore acquire a visible white rectangle. Choose WebP when transparency is needed and supported by the destination.
For a PNG export without this lossy compression workflow, use Image Resizer and choose PNG. The compressor is not a lossless PNG optimizer. It is designed to create JPEG or WebP copies with adjustable quality.
Keep the useful result
Download the preferred export, open it locally and check the destination's acceptance before deleting any alternatives. WebP is not promised to be smaller for every source, and JPEG is not automatically the better-looking choice. The practical decision depends on file size, visible quality, transparency and where the image will be used.