Image compressor

Drop it into the Brushless image compressor and leave the slider on Balanced, quality 80: in our test in Chrome, a 4.8 MB, 6000 × 4000 photo came out at 2.3 MB. Move the slider left for a smaller file or right for more detail. A JPEG that would not get smaller is kept as it is.

Yes, losslessly: the Brushless image compressor saves a PNG again pixel for pixel and keeps the original if its copy is not smaller, which happens when the app that exported the PNG already compressed it. For a much smaller file, tick “Save JPG and PNG as WebP as well”: in our test, two exported PNGs of 1.9 MB and 1.2 MB came to 155 KB and 121 KB as WebP. Safari cannot write WebP, so it does not offer that option.

Yes: in the Brushless image compressor, switch to Fit a size and pick 200 KB or 100 KB, or type your own limit, and each file is saved just under it, which is what an upload form with a size limit needs. A full-size photo usually cannot get that small by lowering the quality alone, so below quality 60 it is resized to fewer pixels, keeping its shape, and the new dimensions are shown: in our test, a 2.1 MB, 3000 × 2000 image came out at 197 KB and 1986 × 1324 for 200 KB, and at 96.1 KB and 1429 × 953 for 100 KB. To keep the original dimensions instead, tick that option: the photo is then saved at quality 60 and marked as still over the cap.

No: the Brushless image compressor keeps an image's width and height and makes only the file smaller. The one exception is Fit a size, which draws a photo with fewer pixels when quality 60 alone cannot get it under the limit, and says so. To set an exact width and height, use the Brushless image resizer.

No. The Brushless image compressor reads, compresses and saves your images inside your browser, on your own device, and sends them nowhere.

No: the Brushless image compressor has no daily limit and no file count. Images are compressed one after another on your own device, so the only limit is how many your device can hold open; one ZIP carries up to 65,535 files or 4 GB, so a batch past that is downloaded in parts.

Yes: the slider is one scale everywhere, and the Brushless image compressor gives each browser's encoder the number that measured the same. Safari's JPEG encoder writes about 1.9 times Chrome's bytes at the same number, so for Balanced it is given 55 instead of 80; Firefox's number is matched by a quick size test in the browser. Safari cannot write WebP, so there a WebP file is kept as it is.

JPG, PNG and WebP, which keep their format, plus HEIC and camera RAW (NEF, CR2, ARW, PEF, NRW, SRW and CR3), which come back as JPG. From a RAW file, the Brushless image compressor uses the JPEG the camera stored inside it. To change format on purpose, use the image converter.