Compress Image

How it works

Drop in as many images as you like and this tool re-encodes each one at the quality level you choose, redrawing it on a canvas with your browser's built-in image compression. It processes the whole batch in one go and shows the before-and-after size of every file, plus the total saved. Nothing is uploaded — all the compression happens on your device — and each result has its own download button.

How to compress an image

Start by dragging files into the drop zone or clicking to browse — JPG, PNG and WEBP are all accepted, and you can select several at once. Choose a quality preset: High keeps the image crisp for close viewing, Medium (the default) is a solid balance for the web and email, and Low pushes the size down hardest for thumbnails or previews. Then pick an output format: Same as input keeps each image's format, or force everything to JPG or WEBP. Hit Compress and each file comes back ready to download.

What to expect

The tool re-encodes at the selected quality without changing pixel dimensions, so a photo keeps its width and height while (usually) shrinking on disk. Results are saved with the suffix -min — for example photo.jpg becomes photo-min.jpg — so your originals are never overwritten. One detail to know: PNG is lossless, so a quality change alone won't shrink it much. Converting a PNG photo to JPG or WEBP gives a far bigger saving, and WEBP typically produces the smallest files at a given quality. When forcing JPG, transparent areas are filled with white.

A concrete example

Imagine you have twenty phone photos, each around 3 MB, that you need to email to a client on a 25 MB attachment limit. Upload them all at once, keep Same as input but switch to Low, compress, and you'll likely get each image down under a megabyte — well inside the limit with room to spare. Because the tool shows the before-and-after size for every file and a running total, you can spot the ones that benefit most and even raise the quality for a few while keeping the rest small.

Common problems and fixes

My PNG didn't get smaller. PNG is lossless, so the quality setting barely affects it — switch the output format to JPG or WEBP for a real reduction on photos. The image looks the same size. If the original is already heavily compressed or small, there is little left to remove; try Low quality or a WEBP output instead. A photo gets a white background. That happens when a file with transparency (typically a PNG) is converted to JPG, which has no alpha channel. One file failed or is skipped. Images the browser can't decode are left out and the rest of the batch still finishes.

Frequently asked questions