How image compression works
This tool redraws your image on a canvas and re-encodes it as a JPEG at the quality level you choose. Lower quality means a smaller file, at the cost of some detail.
Choosing a quality level
- 80 to 100% for photos where detail matters
- 60 to 80% for web images, a good balance
- Below 60% for thumbnails and previews
Why smaller images matter
Large images are the main reason pages load slowly. Faster pages rank better in search and keep visitors on the page, which also improves ad performance.
Your files stay private
Compression runs entirely in your browser. Your images are never uploaded to a server.
Frequently asked questions
Are my images uploaded?
No. Everything happens locally in your browser, so your photos stay private.
What quality should I use for the web?
Around 70 to 80% usually gives a big size saving with little visible loss.
Does it change the dimensions?
No, this tool only reduces file size. Use the image resizer to change dimensions.