To compress an image to a specific size in KB, pick the limit above, such as 20 KB or 50 KB, or type your own, then drop the photo in. The tool finds the highest quality that still fits under the limit and shows the exact size of the result. Press the download button next to the image when it is ready.
Made for upload forms
Exam portals, job applications, passport and visa forms and government services often say something like "photo under 50 KB" or "signature between 10 KB and 20 KB", sometimes with a required size in pixels. A phone photo is usually 2 to 5 MB, a hundred times too big. This tool is built around those rules: a maximum size, an optional minimum size, and an optional exact width and height.
How the size is reached
JPG quality can be set anywhere from very low to very high, and file size rises with it. The tool tries quality levels in a binary search and keeps the highest one that fits, so you never get a photo that is smaller and blurrier than it needs to be. If even a low quality setting is too big, the photo is scaled down a step at a time and the search runs again. The result line tells you the final size in bytes, the pixel size and the quality used.
KB can mean 1,000 or 1,024 bytes
Some websites count 1 KB as 1,000 bytes and others as 1,024, and they rarely say which. A 20 KB limit could therefore mean 20,000 or 20,480 bytes. To be safe either way, the tool keeps files at or under the smaller number for a maximum, and at or over the larger number for a minimum. A file made for a 20 KB limit is at most 20,000 bytes, so both kinds of checker accept it.
When a form asks for a minimum size too
Forms that say "between 10 KB and 20 KB" reject files that are too small, and a small photo at a fixed pixel size can easily come out at 6 or 7 KB. Enter the minimum and the tool pads a JPG up to it by adding a comment block inside the file. Image viewers ignore that block, so the picture is unchanged and the file is accepted.
Exact pixel sizes
Choose Exact width × height when the form names a size in pixels, for example 200 × 230 for a signature or 600 × 600 for a photo. The image is scaled to fill that size and centred, and any part that doesn't fit the shape is cropped from the edges, so nothing is stretched. If the shape of your photo is very different, crop it first with the Image Resizer so you choose what is kept.
Common sizes
| Typical request | Limit to pick |
|---|---|
| Signature scan | 10 to 20 KB, often with a minimum |
| Passport-style photo for an exam or job form | 20 to 50 KB |
| ID card or certificate photo | 100 to 200 KB |
| General document upload | 200 KB to 1 MB |
Always check the exact numbers in the form's own instructions; they differ from one site to the next.
Your photos stay on your device
Compression runs in your browser and photos are never uploaded, which matters for ID photos and signatures. When a photo is re-saved, its location and camera details aren't copied into the new file.
For general web images where you choose the quality yourself, use the Image Compressor. To change a format, such as WebP to JPG, use the Image Converter, and for a PDF that is over a size limit, use Compress PDF.
