JPEG to WebP Converter

Photos are the bulk of most web pages. A blog post with a few large images, a shop category page with dozens of product shots or a portfolio gallery can add up to many megabytes of JPEG. Every byte has to travel to the visitor's phone before the page feels finished.

WebP was designed to carry the same photo in less data. Google's WebP documentation reports lossy WebP files as 25 to 34 percent smaller than JPEGs of comparable quality. On an image-heavy page that is a real difference in load time, especially on mobile networks.

Speed tools such as Lighthouse and PageSpeed Insights also recommend serving images in modern formats, so converting can clear one of the warnings they list.

Both formats are lossy for photos and both discard detail the eye rarely notices. WebP does it with newer techniques taken from video coding, which is why it reaches the same visible quality with fewer bytes. It also supports transparency and animation, though JPEG photos have neither, so those features play no role in this conversion.

Because the JPEG has already been compressed once, converting means a second lossy step. Start from the highest-quality version you have, ideally the original export from your camera or editor, not a copy downloaded back from your own site.

Converting also helps when a page builder or theme adds no image optimization of its own. Many site platforms resize uploads but keep the JPEG format, so the files you upload are the files visitors download. Uploading WebP from the start puts the saving in place without any plugin.

Current browsers have shown WebP for years, so serving it to visitors is low risk. The table includes AVIF for comparison: it can compress photos further, but support came later and encoding takes longer, which is why many sites adopt WebP first.

If your audience includes very old devices, use your platform's fallback feature, such as a picture element with a JPEG fallback, or keep JPEG for the few pages where it matters.

Keep track of which pages use the new files. Converting in batches of up to 20 photos, page by page or gallery by gallery, makes it easier to check that nothing broke. Uploads are deleted after processing and the WebP files 30 minutes later.

WebP is a clear win for pictures shown on your own pages and a poor choice for files you hand to others. The comparison below sums up both sides. For most blogs and shops the pros are what matter, because visitors only ever see the images in a browser.

Resize as well as convert. A photo 4,000 pixels wide shown in a 1,200-pixel column wastes most of its bytes, whatever the format. Set a width under Resize output before converting, or use Resize Image for exact sizes.

If the photos also need a smaller file size than WebP alone gives, Compress Image can aim for a target in kilobytes, and the Image Converter offers AVIF as another modern target.