WebP Converter Offline
Click or Drag & Drop
Supported formats: .PNG, .JPG, .JPEG, .GIF
How It Works
1
Upload File
Select or drag & drop your .png, .jpg, .jpeg, .gif file into the upload box.
2
Convert
Our secure servers instantly convert your file to .webp.
3
Download
Download your converted file. All files are automatically deleted for your privacy.
Frequently Asked Questions
Yes, completely safe. utool processes your files locally inside your browser using WebAssembly. Your data is never sent to our servers, logged, or stored anywhere.
Simply open the utool page while you have internet access. After the page fully loads, you can disconnect from the internet and the tool will continue to work locally using browser-cached resources.
Only for the initial page load. Once loaded, all processing runs offline in your browser. No internet is needed to convert images to WebP.
Yes, the tool session stays active in your browser tab whether you're online or offline. Your input data remains in browser memory until you close the tab.