Compress Image reduces the file size of your JPG, PNG and WebP pictures while keeping them looking sharp. Choose the quality and maximum width, compress many images at once, and download them instantly — nothing is uploaded.
How to compress an image
- Click "Choose images" or drag and drop your pictures into the box.
- Set the quality (75% is a good balance) and, if you like, a maximum width.
- Pick the output format: keep the original, JPG or WebP.
- Click "Compress", check the new sizes, then download one image or all as a ZIP.
Why use ZentaPDF Compress Image?
Frequently asked questions
Are my files uploaded to a server?
No. ZentaPDF processes your files inside your own browser using JavaScript. Nothing is uploaded, so nobody else can see your documents — not even us.
How much smaller will my images get?
Photos usually shrink by 50–80% at 75% quality with no visible difference. Reducing the maximum width saves even more.
Which format gives the smallest files?
WebP is usually 25–35% smaller than JPG at the same quality and works in all modern browsers. Use JPG when you need maximum compatibility.
Why is my PNG not much smaller?
PNG is a lossless format, so quality settings do not apply to it. Convert it to JPG or WebP, or reduce its width, to make it much smaller.
Is photo information (EXIF) kept?
No. Compression removes hidden data such as camera details and GPS location, which also protects your privacy.
Is it really free? Do you add a watermark?
Yes, it is completely free with no sign-up, no watermark and no daily limits. The site is supported by a few non-intrusive ads.