Does this work offline on iPhone?

Yes — after the first visit Safari caches the tool, so it still runs without a connection.

Are my photos uploaded anywhere?

No. Every conversion runs locally inside Safari on your iPhone; nothing is sent over the network.

40–70% on average. Depends on the image and your quality setting.

The default 78% is a practical balance; raise it for professional use.

Shrink image files while preserving quality

Built for iPhone users: no app install, no upload. Convert entirely in Safari and save back to the Photos app in seconds.

Compress JPG, PNG, WebP, and more by 40–70% while keeping them visually sharp. Quality slider included. All in-browser.

拖入图像,或点击选择

每次最多 30 个文件,每个 80.00 MB。

支持: JPG / PNG / WebP / HEIC / AVIF

添加的文件将显示在此处

Does this work offline on iPhone?: Yes — after the first visit Safari caches the tool, so it still runs without a connection.
Are my photos uploaded anywhere?: No. Every conversion runs locally inside Safari on your iPhone; nothing is sent over the network.
How much smaller will files be?: 40–70% on average. Depends on the image and your quality setting.
Will I lose visual quality?: The default 78% is a practical balance; raise it for professional use.