PhotoSizeMaker

JPG to WebP Converter

WebP gives the same visual quality as JPG in a smaller file. Convert photos here, compare the saving on every row and download the results, all without uploading anything.

Drop images here, or click to chooseJPG, PNG, WebP, GIF, BMP or AVIF · you can also paste an image from the clipboard

🔒 Runs in your browser. Your files and text are not uploaded.

How to use the JPG to WebP Converter

  1. Drop your JPG pictures on the box, or click it to choose files.
  2. Set the Quality: 80–90 suits most photos. Tick “Lossless” only if you need exact pixels, as that makes much larger files.
  3. Compare the new size with the original on each row.
  4. Download one WebP or all of them as a ZIP.

Why WebP files are smaller

WebP was developed by Google and uses predictive coding borrowed from video compression. According to Google’s own documentation, lossy WebP images are 25–34% smaller than comparable JPEG images at the same quality measure. For a website with many pictures that adds up to a faster page and a smaller bill for bandwidth, especially for visitors on mobile data. Your own results depend on the pictures: photos with smooth areas save more, and very detailed images save less.

Browser support and where WebP fails

Every current major browser can display WebP: Chrome, Edge, Firefox, Safari, and their mobile versions. Outside the browser support is patchier. Some forms, editors, print services and older systems do not accept WebP, so do not use it for pictures you plan to attach, print or send to someone else. It shines for images that you control on your own website or app.

Use WebP on a website, with a fallback

To be safe on very old systems, keep the JPG as a fallback. The picture element lets the browser pick the first format it understands:

<picture>
  <source srcset="photo.webp" type="image/webp">
  <img src="photo.jpg" alt="Describe the picture" width="1200" height="800">
</picture>

Always give the image its width and height so the page does not jump while it loads. For a full introduction to the formats and the trade-offs, see JPG vs PNG vs WebP.

Choosing quality, and a note about browsers

Quality numbers of different formats are not comparable: WebP at 80 can look as good as a JPG at 85. Start at 80–85, zoom to 100% on a detailed region such as hair, text or a gradient sky and lower the value until you begin to see differences, then go one step back. The conversion is carried out by the encoder built into your browser. Chrome, Edge and Firefox can create WebP files; some browsers, notably Safari, have not offered this to web pages, and the tool tells you when that is the case. Use one of the other browsers then.

Frequently asked questions

How much smaller is WebP than JPG?

Google reports 25–34% smaller files for lossy WebP at equivalent quality. The saving varies by picture, so compare the sizes on the result rows.

Does every browser support WebP?

All current major browsers can display it. Some older software and upload forms cannot read it, so keep a JPG when you send pictures to others.

What does the lossless option do?

It stores the picture without any additional loss. The file is larger than a lossy WebP and may even be larger than the JPG, so only use it when exact pixels matter.

Why did the tool say my browser cannot create WebP?

Safari has not offered WebP encoding to web pages so far, and the tool reports it when your browser cannot create the file. Use Chrome, Edge or Firefox.

Do you upload my pictures?

No. The encoder runs in your browser.

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