Image Compressor
Shrink JPG, PNG and WebP files to a smaller size with a quality slider, and see exactly how many kilobytes you saved before downloading.
How to use the Image Compressor
- Select one or more images from your device.
- Adjust the quality slider and watch the estimated file size change.
- Download the compressed image.
About the Image Compressor
Image weight is usually the single biggest cause of a slow page, and most photos can lose half their file size before a difference is visible. Compression here happens entirely in your browser, so a folder of photos never gets uploaded to a stranger's server — which matters when the photos are personal or a client's. Start at around 80% quality and lower it until you can see the loss, then step back one notch.
Frequently asked questions
Are my images uploaded to a server?
No. Compression runs in your browser using the Canvas API, so the files never leave your device.
How much can I compress without visible loss?
Most photographs tolerate 70–85% quality with no visible difference, often halving the file size.
Which formats are supported?
JPG, PNG and WebP, with WebP usually giving the smallest result at equal quality.
How small can I get a photo in KB?
Most photographs drop to a few hundred KB with no visible loss, and well under 100 KB if you also reduce the dimensions. Set a target quality and the preview shows the resulting size before you download, so you can stay under an upload limit.
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Runs entirely in your browser — nothing you enter is uploaded. Last reviewed and updated .