Quick answer
To convert JPG to WebP, add your JPG or JPEG photos; WebP is already selected at 82 percent quality. Each photo is converted as soon as it's added, and you'll see the old and new size side by side. Download the WebP files one by one or as a ZIP. Everything runs in your browser, so the photos never leave your device.
How to convert JPG photos to WebP
- Add your JPG photos.
Drag them onto the page or press Choose JPG images. Up to 100 at a time.
- Adjust the quality if needed.
82 percent is a good balance for web photos. Go lower for thumbnails, higher for hero images.
- Download the WebP files.
Save each file or use Download all (ZIP), then upload them to your site.
What you gain by switching JPG to WebP
Images are usually the heaviest part of a web page, so they decide how fast it appears on a phone. WebP compresses photos more efficiently than JPG: Google's published comparison found lossy WebP files 25 to 34 percent smaller than JPGs of similar quality. Smaller images mean a faster Largest Contentful Paint, less mobile data for visitors and lower bandwidth costs. Every current browser displays WebP, including Safari on iPhone.
Using WebP on WordPress, Shopify and other platforms
WordPress has accepted WebP uploads since version 5.8, Shopify and most other platforms accept them too, and image CDNs serve them widely. Convert your images here before uploading, then replace the JPGs in your media library. Keep the original JPGs as an archive: re-saving a WebP back to JPG later loses a little more quality each time. If an old plugin or email tool rejects WebP, use the JPG for that one place.
Choosing the right quality
- 75 to 82 percent: product photos, blog images and most page content.
- 85 to 90 percent: large hero images and photography portfolios where detail matters.
- 60 to 70 percent: thumbnails and small previews.
For the biggest savings, combine conversion with resizing: a 4000-pixel phone photo shown at 1200 pixels wastes most of its weight. The image compressor can resize and convert to WebP in one go. Starting from PNG graphics instead? Use PNG to WebP, which keeps transparency.
How the conversion works
Chrome, Edge and Firefox encode WebP natively. Where a browser can't, as has long been the case with Safari, KitFuse loads a small WebAssembly build of Google's libwebp encoder once and runs it on your device. Converted files contain no EXIF data, so camera details and GPS location aren't published with your images.
Key features
- JPG and JPEG to WebP
- Quality slider with live size comparison
- Batches of up to 100 photos
- ZIP download
- Strips EXIF and GPS data
- Works in Safari via WebAssembly
- No uploads
At a glance: privacy, limits and output
| Processing | In your browser; nothing is uploaded |
|---|---|
| Input | JPG and JPEG, plus PNG, HEIC, AVIF and GIF, up to 100 MB each |
| Output | WebP at 82% quality by default |
| Typical saving | About a quarter to a third smaller than the JPG at similar quality |
| Batch size | Up to 100 images, downloaded as a ZIP |
| Price | Free, with no sign-up and no watermark |
Frequently asked questions
Is WebP better than JPG?
For websites, usually yes: WebP files are smaller at similar quality and support transparency. JPG still wins for compatibility with older desktop software and some email tools.
Will my JPG lose quality when converted to WebP?
WebP is lossy at these settings, so the image is re-encoded. At 82 percent the difference is very hard to see. Always convert from the original JPG, not from an already re-compressed copy.
Does WordPress support WebP?
Yes. WordPress accepts WebP uploads natively since version 5.8, as do Shopify, Wix, Squarespace and most modern platforms.
How many photos can I convert?
Up to 100 per batch, each up to 100 MB.
Are my photos uploaded?
No. They're converted in your browser and stay on your device.
Guides and how-tos
- WebP vs JPG vs PNG vs AVIF: which image format should you use?A plain comparison of JPG, PNG, WebP, AVIF and HEIC, and which one to use for photos, graphics, websites, print and email.
KitFuse is a free collection of browser-based tools for PDFs, images, video, text and everyday calculations. Every tool runs on your own device, so your files and data are never uploaded. About KitFuse.