WebP holds the same visual quality as JPG in a noticeably smaller file, which is why it is worth using for anything going onto a web page. Convert a whole folder at once and download them together.
For a photo-heavy site the saving is real — often 25–35% smaller than JPG — and it adds up across a page full of images, so the page loads faster.
Everything runs on your device with nothing uploaded, and you can set a hard size cap if a specific limit matters.
How to use it
Add the JPGs you want to shrink.
Optionally set a size cap.
Press Convert — WebP holds the same look in a smaller file.
Download them together as a ZIP.
Supported formats and limits
Input
JPG photos
Output
WebP
Typical saving
25–35% smaller at the same visible quality
Support
Every current browser
Where it runs
In your browser; nothing uploaded
Not for: Sending to someone on very old software — keep a JPG copy for anything that predates WebP support.
Frequently asked questions
Are my files uploaded to a server?
No. This conversion runs entirely inside your browser using your own device’s processing power. The file never leaves your computer or phone, which is why it also works when your connection drops.
Does every browser show WebP?
Every current browser does. Only very old software might not, which is the one case to keep a JPG copy for.
Is quality lost converting JPG to WebP?
Re-encoding costs a little, as with any lossy format, but at the default quality it is not visible — and the file is smaller for the same look.