Compress Image Online

Need to reduce an image's file size for a website, email, or online upload? This tool makes it easy to compress PNG, JPEG, and WebP images directly in your browser, without installing additional software. Choose your preferred output format and quality level to find the right balance between file size and image quality, with the resulting file size updating live so you can compare the results before downloading.

Simply load your image, adjust the compression settings, and download the optimised result when you're happy with it. All processing takes place on your own device, with no images uploaded to a server, keeping your files private and under your control.

Accepted files: .png, .jpg, .jpeg and .webp

Drag and drop an image here or browse your device, or paste from your clipboard PNG, JPG or WebP

How to use it

The image compressor reduces a photo's file size right in your browser.

Add your imageDrag and drop it onto the upload area, browse for a file, or paste one from your clipboard.
Choose a formatKeep the original type, or switch to JPEG, PNG or WebP.
Adjust qualityLower quality gives a smaller file. The new size updates as you drag the slider.
DownloadSave the compressed image once you're happy with the size and quality.

Good to know

Nothing is uploaded

Compression happens in your browser — your image never leaves your device.

PNG quality means colors

PNG can't go "lossy" the way JPEG does, so the slider instead limits how many colors it keeps. 100 keeps every color exactly (true lossless); lower settings shrink the palette for a smaller file.

WebP is usually smallest

For photos, WebP typically produces the smallest file at a similar quality to JPEG, and it still supports transparency.

Frequently asked questions

Will compressing reduce image quality?

JPEG and WebP are lossy, so lower quality settings do reduce detail in exchange for a smaller file. For PNG, 100 keeps every pixel exactly as it was (true lossless); below that, the number of colors in the image is reduced, which can be visible on photos but usually isn't on screenshots, icons or other graphics with fewer colors to begin with.

Which format should I choose?

JPEG is widely supported and works well for photos without transparency. WebP usually gives the smallest file size while still supporting transparency. PNG at quality 100 is best when you need a perfectly lossless result, such as screenshots or graphics with sharp edges — and at lower quality settings it can still shrink those considerably without a visible difference.

What happens to transparency if I choose JPEG?

JPEG doesn't support transparency, so any transparent areas are filled with white.

Is my image uploaded anywhere?

No. JPEG and WebP are compressed with your browser's Canvas API; PNG uses an open-source JavaScript library (UPNG.js) that also runs locally. Either way, the file is never sent to a server.