Compress images to a target size
Shrink JPG, PNG and WebP images for upload forms, email and websites. Pick a size limit such as 50 KB and the compressor finds the highest quality that fits under it, or set the quality yourself. You can do up to 20 images at once and download them together as a zip. Nothing is uploaded: the images are processed in your browser.
Compressing for an upload limit
Application portals are strict about file size. India's SSC exams, for example, have asked for a JPEG photo between 20 KB and 50 KB and a signature between 10 KB and 20 KB. Choose Target file size, pick the limit or type your own, and compress. The tool lowers the quality step by step and keeps the best version that fits. If quality alone cannot get there, it also reduces the pixel dimensions slightly and tells you it did.
Two cautions. Some portals set a minimum size as well as a maximum, so aim for the upper part of the allowed range rather than the smallest possible file. And many specify pixel dimensions too. If yours does, set the exact width and height with the image resizer, which has the same size limit option, and always check the current notice for the exact rules.
Choosing a format
- JPG is what most forms and older systems expect, and it suits photos. It cannot store transparency, so transparent areas turn white.
- WebP makes smaller files: Google measured lossy WebP at 25 to 34% smaller than JPEG at the same visual quality. It keeps transparency and opens in every current browser, but some upload forms and older programs still refuse it.
- PNG is lossless, which keeps screenshots and graphics crisp, but re-saving a PNG rarely makes it much smaller. If a screenshot is too big, WebP usually gives the biggest saving.
How far you can lower the quality
For photos, a quality of about 70 to 80% usually looks identical to the original on screen while being a fraction of the size. Below about 50% you start to see blocky patches in smooth areas such as sky and skin, and faint halos around sharp edges. Text and line drawings show these flaws much sooner than photos do, which is why a screenshot of a document looks worse as a compressed JPG than a holiday photo at the same setting.
Hidden photo data is removed
Photos from phones usually carry EXIF data: the camera model, the time the picture was taken and often the GPS location where it was taken. The compressor redraws each image before saving it, so that data is not copied into the new file. It is an easy way to clean a photo before you post it publicly. If you need the metadata, keep the original.
Why a file can come out bigger
An image that was already compressed hard can grow when it is saved again at a higher quality, and a small, simple PNG can grow when converted to JPG. The list shows the size before and after for every image, so you can see when the original is already the smaller file and keep it.
Limits
Up to 20 images per batch, each up to 25 MB. iPhone HEIC photos only open in Safari; on other browsers, convert them to JPG first with the image converter.