Convert JPG to WebP
Convert JPG images to WebP and cut roughly a third of the file size at matching quality. Ideal for websites. Runs in your browser with no upload.
Runs entirely in your browser — nothing is uploaded
What WebP actually buys you
Roughly 25 to 35 percent off the file size at matching visual quality. On a page carrying a dozen photographs that is a meaningful difference to load time, particularly for visitors on a phone connection.
Google released the format in 2010 precisely to make the web faster, and every current browser — Chrome, Firefox, Safari, Edge, on desktop and mobile alike — has supported it for years. Browser compatibility stopped being a reason to avoid WebP some time ago.
Where it belongs, and where it does not
Use WebP for images you serve from your own website. You control the delivery, every visitor’s browser can read it, and the speed gain is free.
Do not use it for files you send to people. Email attachments, files for a client, anything headed to a print shop or into older desktop software. WebP is still routinely rejected outside the browser, and the recipient will not thank you for a file they cannot open.
The SEO question, answered honestly
WebP does not rank you higher. There is no bonus for using a particular image format, and anyone telling you otherwise is selling something.
What it does is make pages load faster, and load speed genuinely is a ranking signal through Core Web Vitals. The benefit is real but indirect — it arrives through the speed, not through the format. Which also means WebP on an already-fast page changes very little.
Resize before you convert
Format is the smaller half of the problem. A photo straight from a phone is around 4000 pixels wide; displayed in a 600-pixel column, more than 90 percent of those pixels are downloaded and then discarded by the browser.
Run the images through the resizer first, down to roughly twice their display size, and then convert to WebP. The combination beats either step alone by a wide margin.
Convert from your best original
Both formats are lossy, so each re-encode discards a little more. Converting a JPG that has already been compressed hard gives you a small file that carries every artefact of the original plus some new ones. Start from the highest-quality version you have.
Nothing leaves your browser
Images are decoded and re-encoded locally, with no upload and no limit on batch size — useful when you are converting an entire site’s worth of photographs in one go.
Frequently asked questions
How much smaller will the files be?
Typically 25 to 35 percent smaller than a JPG of matching visual quality. On a page carrying a dozen photographs that is a real difference to load time, and load time feeds directly into how Google ranks the page.
Do all browsers support WebP?
Yes. Chrome, Firefox, Edge and Safari have all supported it for years, including on mobile. Browser support stopped being a reason to avoid WebP some time ago.
Should I convert everything to WebP then?
For images on your own website, yes. For files you send to other people, no — keep JPG. Plenty of desktop software, print shops and upload forms still refuse WebP, and the recipient will not thank you for a file they cannot open.
Is quality lost in the conversion?
Some, because the image is re-encoded and both formats are lossy. At the default quality it is not visible. Convert from your highest-quality original rather than from an already heavily compressed JPG, since the losses accumulate.
What about SEO?
WebP does not rank you higher by itself. What it does is make pages load faster, and page speed is a genuine ranking signal through Core Web Vitals. The benefit is real but indirect — it comes from the speed, not from the format.