Konvizi
Free No upload
Drop your JPG files: they are converted to WebP on your device, in a few seconds.
Drop your JPG files here
or
Your files stay on your device
Konvizi’s “JPG to WebP” tool is free, with no sign-up, no watermark and no file limit. All the processing happens in your browser, on your device: your files are never uploaded to a server, which makes it suitable for personal and confidential documents.
Drag your JPG files into the area above or click “Choose files”. You can add several at once.
Each file is converted to WebP by your browser. Nothing is sent over the internet.
Download your WebP files one by one, or all together with “Download all”.
JPG (or JPEG) is the most widely used photo format in the world. It compresses images by removing details that are hard to see, which gives small files, but it does not support transparency.
Every new save as JPG degrades the image a little: for editing it or placing it in a document, another format is often a better fit.
WebP is an image format created by Google to make web pages lighter. At the same quality, it produces files 25 to 35% smaller than JPG, and it also supports transparency.
It is a very good choice for a website or a blog: lighter images, so pages that load faster.
Your photos stay on your phone or computer: family pictures, photographed ID documents and screenshots are never sent online. The image is redrawn by your browser, so the output file does not carry the original’s EXIF metadata, including GPS location: handy before sharing a photo. And since nothing is uploaded, dozens of images convert in seconds.
Your files never leave your device. No upload, no storage.
No upload and no queue: the conversion starts right away.
As many files as you like, with no imposed size limit.
No sign-up, no watermark, no subscription.
| Konvizi | Typical online converter | |
|---|---|---|
| Where your files are processed | In your browser, on your device | On the service’s servers |
| Upload to the internet | None | Required, then you download the result |
| Storage of your files | None: nothing is stored | Stored on a server, at least while processing |
| Waiting time | Starts instantly | Upload time, sometimes a queue |
| Account | Never required | Often required beyond a few files |
| Watermark and limits | No watermark, no maximum number | Common on free plans |
Yes, completely. No sign-up, no watermark, no maximum number of files: you can convert as many files as you like.
No. Everything happens in your browser, on your device. Your files are never sent over the internet: nobody but you can see them.
Chrome, Edge, Firefox and Opera do it very well. Some versions of Safari can display WebP but not create it: in that case, Konvizi tells you. Images are saved at 92% quality.
Yes. They are two extensions for the same format: .jpg and .jpeg files are accepted in the same way.
Open your browser’s developer tools (F12 key), go to the “Network” tab and run a conversion: no request carries your file. The site also enforces a security rule (Content-Security-Policy) that forbids the browser from contacting any site other than konvizi.com, and konvizi.com is a static site with no service able to receive files.
Yes. Konvizi works in the browser of your phone or tablet (Safari, Chrome…) just like on a computer, with no app to install. Very large files are processed faster on a computer, which has more memory.