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JPG to WebP Converter

Convert JPG images to WebP, the format most websites now use to keep pages light, in batches and without uploading.

Upload Images to Convert to WEBP

Drag and drop files here, or click to browse

Your images are processed in your browser and are not uploaded to Image York.
You retain full ownership of your images. Image York does not store or claim rights. View License

Why WebP for websites

WebP was designed for the web. Its lossy mode generally reaches the same visual quality as JPG with fewer bytes, it supports transparency, and current versions of Chrome, Edge, Firefox and Safari display it. Smaller images mean less data to download, which matters most on mobile connections.

Google's WebP documentation describes its lossy files as typically 25 to 34% smaller than comparable JPGs. Real savings vary from image to image, so compare the before and after sizes the tool shows for your own files.

When the WebP comes out bigger

This converter saves at quality 0.9, which favours appearance. A JPG that was already saved at low quality, or a small, heavily optimised thumbnail, can produce a WebP that is the same size or larger. If that happens, try the Image Compressor with WebP output and a lower quality, or keep the JPG for that file.

Using WebP on your site

  • Most site builders and content systems accept WebP uploads today. If yours does not, it will reject the file rather than show it broken.
  • If you must support very old browsers, serve WebP with a JPG fallback using the HTML <picture> element.
  • Resize before converting: a 4000 px photo in a 800 px column wastes far more bytes than the format choice saves. The Bulk Image Resizer can do both size and format in one pass.

Settings and output

  • Quality: WebP is written at quality 0.9 where the format uses a quality setting. There is no slider on converter pages; use the Image Compressor if you want to choose the quality yourself.
  • Size limits: images longer than 4096 px on either side are scaled down to 4096 px. If a converted file would be over 10 MB, it is reduced in steps until it fits.
  • Batches: add several files; three are converted at a time. One file downloads directly, two or more come as a ZIP.
  • Metadata: EXIF data (camera, date, GPS) and colour profiles are not carried into the new file.

Where the processing happens

The conversion uses your browser's own WebP encoder. If your browser cannot write WebP, the file is marked with an error instead of being saved in the wrong format. Nothing is uploaded.

Questions about this tool

Is this lossless WebP?

No. Browsers encode WebP from a canvas in lossy mode. Quality 0.9 keeps it close to the original, but it is not a bit-exact copy.

My website loads slowly because of big photos. Will WebP help?

Usually. WebP files are often smaller than JPGs that look the same, so pages download faster. Resize large photos to the size they are shown at as well, because that often saves even more.

My WebP came out bigger than the JPG. Is something wrong?

No. The converter uses a high quality setting, and a JPG that was already heavily compressed can come out the same size or larger. For those files, use the Image Compressor with WebP output and a lower quality, or keep the JPG.

Do all browsers show WebP images?

Current versions of Chrome, Edge, Firefox and Safari all show WebP. If you must support very old browsers, offer a JPG as a fallback with the HTML picture element.

Why does a file show an error instead of a WebP?

Your browser could not save in WebP format. Rather than giving you a file with the wrong format and a .webp name, the tool marks it as failed. Try an up-to-date browser.

Can I convert many files at once?

Yes. Add several files and press Convert Images once. Three are converted at the same time. Download All gives you one ZIP file, or you can download each file on its own.