How to compress an image
- Drop in the images you want to shrink — one or a hundred, it makes no difference.
- Drag the quality slider. Lower numbers mean smaller files; around 70–80 is usually indistinguishable from the original.
- Optionally switch the output to WebP or AVIF, which compress considerably better than JPG.
- Press Compress, check the size saved on each row, then download.
Questions people ask
How much smaller will my images get?
It depends entirely on the source. A photo straight from a phone camera typically drops by 70–90% with no visible difference. An image that has already been compressed once will shrink much less, because the redundant detail has already been thrown away.
Does compressing reduce the dimensions of my image?
No. Compression changes how the pixels are stored, not how many there are. If you also want fewer pixels, tick the resize option — that is usually where the really dramatic savings come from.
Will the quality visibly drop?
At the default of 78 it is very hard to tell the difference on a photograph, even side by side. Below about 50 you will start to see softness and blocky patches around sharp edges and flat colour areas. Use the comparison slider to judge for yourself before you commit.
Can I compress a PNG?
PNG is a lossless format, so there is no quality dial to turn — the only way to make a PNG meaningfully smaller is to convert it to a lossy format. If your PNG is a photograph, switch the output to JPG or WebP and the file will collapse in size. If it is a logo or screenshot with transparency, use WebP to keep the transparent background.