How to convert JPG to WebP
Add one or more JPG files, pick a quality level if the option is shown, and press Convert. Each image is decoded, redrawn on a canvas and saved again in the WebP format. Converting several files at once is supported, and the results can be downloaded together as a ZIP archive.
JPG and WebP compared
JPG (also written JPEG) is the oldest widely supported photo format. It uses lossy compression, which keeps photographs small but discards some detail every time the file is saved. It works best for photographs, scanned pictures and any image with soft gradients, and is a weaker choice for flat graphics, screenshots with text and anything that needs a transparent background.
WebP is a modern web format from Google that offers both lossy and lossless modes and supports transparency. It usually produces smaller files than JPG or PNG at similar visual quality. It is the better fit for website images where page speed matters, while it is less suitable for workflows that still rely on very old software or e-mail clients.
Converting to WebP does not create transparency
WebP supports an alpha channel, but a JPG source has no transparent pixels to carry over. The converted file keeps the same solid background it had before; removing a background is a separate editing step.
Choosing a quality level
WebP is a lossy format, so the quality slider decides the trade-off between file size and detail. Around 80–90 is a sensible range for photographs: the difference is hard to see, while the file is far smaller than at 100. Flat graphics with sharp edges usually need a higher setting, because lossy compression tends to blur hard edges.
What to check after converting
- Open the result at full size and look at edges, text and flat colour areas first — that is where compression artefacts appear.
- Compare the file size against the original. If a WebP file is larger than the JPG source, lower the quality slider or reconsider the format.
- Check that the image dimensions are unchanged. Conversion never resizes an image; use the resizer tools for that.
Format support in browsers
Saving files relies on the image encoders built into your browser. PNG, JPG and WebP are available almost everywhere. AVIF encoding is only present in some recent browsers, and the tool will tell you clearly when the format you picked cannot be written on the device you are using, rather than producing a broken file.