Image Compressor Guide
Resize and re-encode an image in the browser — cap its dimensions, pick a format and quality, then download the smaller file.
Image Compressor shrinks a picture in your browser by redrawing it on a canvas and re-encoding the pixels. Max width and Max height act as ceilings: the image scales down to fit inside both, the aspect ratio is kept, and a smaller image is never enlarged.
Compress a throwaway image
Choose a disposable photo under Image. Set Max width to 200 and leave Max height empty. When Result appears, Compressed should start with 200× and Saving should show a percentage. Drag Quality down to 50; the preview gets softer and the JPEG or WebP file usually gets smaller. Choose Download to save <name>-compressed.jpg.
Keep original leaves PNG and WebP as they are, but GIF and everything else come out as JPEG. Because JPEG has no transparency, a transparent image switched to JPEG gets a filled background, so keep PNG or WebP selected when that matters. Width and height are ceilings, so setting them larger than the source does nothing.
Where your input goes
Processing runs in your browser. The tool does not upload your input to ilham.dev.
Related guide
For more background, read Practical Image Tools.
Questions you might have
- Does compressing remove the metadata?
- Yes, for the file you download. The pixels are redrawn onto a canvas and written out again, and a canvas only carries pixels, so EXIF, GPS and camera settings are not part of it. That is convenient when you want to strip a location before sharing, but it also means a rotated photo can come out the wrong way round, because the orientation tag that told viewers how to display it is gone.
- Why did my translucent PNG turn black or white?
- Because the format you chose does not keep transparency. JPEG has no alpha channel, so transparent pixels are filled with the encoder’s default colour, usually black. Keep PNG or WebP selected when the image has a transparent background, and switch to JPEG only when every pixel is opaque.
- The file got bigger instead of smaller — why?
- Re-encoding is not automatically a win. Re-encoding a photograph to PNG usually changes little, and turning a small, already-optimised JPEG into a PNG can easily double it. The quality slider only applies to JPEG and WebP; for those two, lowering it is what actually shrinks the file.
- Is there a size limit?
- Only what the browser and its memory can hold. Everything runs on this device, so a very large panorama can be slow or hit the canvas size limit, around 16,000 pixels a side in most browsers. If a huge image fails, cap the width or height and try again.