How much can I compress my images?

With Prism's smart compression, you can reduce image file sizes by up to 90% while maintaining excellent visual quality. The exact compression depends on the original image and quality settings you choose.

Are my images stored on your servers?

No, absolutely not. All image compression happens directly in your browser using JavaScript. Your images never leave your device, ensuring complete privacy and security.

Which image formats are supported?

Prism supports JPEG, PNG, WebP, and HEIC formats for compression. All formats are processed with the same high-quality algorithms.

Can I compress multiple images at once?

Yes! You can select multiple images at once or drag and drop several files. Each image will be compressed individually with your chosen quality settings.

Yes, Prism is completely free to use. There are no hidden costs, subscriptions, or limitations on the number of images you can compress.

Compress Images Online Free

Reduce image file size up to 90% without losing quality. Compress JPG, PNG, WebP and HEIC images instantly in your browser.

Drop your images here

or click to browse

Supported formats: JPG, PNG, WebP, HEIC

How it works

Upload your images

Drag and drop or select files from your device.

Automatic compression

Smart optimization finds the perfect balance between size and quality.

Download instantly

Get much smaller files with no visible quality loss.

Why choose Prism

Fast and simple

Upload, click compress, done. No settings to configure.

Smart compression

Automatically optimized for the best quality-to-size ratio.

Private by design

Images never leave your browser.

No sign up

Use the tool instantly, with no account required.

Your privacy matters

Your images are processed directly in your browser.

We do not store your files on our servers.

Everything happens locally for maximum privacy.