Compress an image to 100KB

A hundred kilobytes is the point where compression stops being painful. Most photographs keep their full look and simply weigh less.

Files never leave your browser

Drop images here or click to choose — every file comes out under 100 KB

This is a comfortable limit

Unlike 20 or 50 KB, 100 KB is not a struggle for a single photograph. A portrait at 1000 × 1300 pixels usually fits without any reduction in pixel size at all — only the JPEG quality moves, and it moves into a range where the difference is invisible at normal viewing distance.

Press Compare on the result and drag the divider. If you cannot see the join, nothing was lost that matters.

Where the 100KB rule comes from

It shows up in three places more than anywhere else: image fields in older content management systems, product thumbnails on marketplace listings, and email newsletters, where a heavy image slows the whole message down and some clients refuse to load it at all.

In all three the image will be displayed small. That is worth knowing, because it means you can also reduce the pixel dimensions and get a sharper-looking result at the same file size — a 900-pixel image squeezed to 100 KB looks better than a 4000-pixel one squeezed to 100 KB, every time.

Screenshots are a different problem

If what you are compressing is a screenshot rather than a photograph, JPEG is the wrong container: it smears text edges into grey fuzz, and at 100 KB the fuzz is visible. Choose PNG in the format list instead. This site does not use the browser's PNG writer — it writes its own, and on interface screenshots that is the difference between 46.5 KB and 10.0 KB for the same picture, with no pixel changed.

Landing just under, not far under

Ask most tools for 100 KB and they hand back something far smaller. That looks like success and is really waste — every unused kilobyte was quality given away for nothing. This searches for the highest quality that still fits. Measured across 28 runs — the seven size limits on this site against four different pictures — nothing came back over the limit, and the results filled 96% of the budget on average.

Nothing is uploaded at any point — the work happens on your own device, which is also why there is no daily limit and no watermark. How that works, and how to check it yourself.

Other size limits

Set any other limit on the main compress page, or read how upload size limits actually work.