Get your photo under the upload limit.
Online forms reject files over 20 KB, 50 KB or 100 KB. Pick the limit, drop your photo or signature, and download a JPG at or under that size.
passport-photo.jpg
2.40 MB
50 KB limit
Too large for the form
KB
Drop images here or click to choose
JPG, PNG or WebP. You can add up to 20 at once.
Output is always a JPG, and transparent areas turn white. The result is at or under your KB limit, but it is not guaranteed to meet a minimum size. If the form needs a minimum too, check the result before you upload. Need PNG or a transparent background? This tool is not the right fit.
The form also asks for pixel dimensions
px
Nothing is uploaded. Your images are compressed on this device.
Why people use KB Kit
- Stays on your device Your photo is compressed inside your browser. It is never sent to a server, which matters for ID photos and signatures.
- No waiting There is nothing to upload or download, so even a large phone photo is ready in a second or two.
- Made for form limits Presets for 20, 50, 100, 200 and 500 KB, plus optional maximum width and height for forms that list pixel sizes. The image keeps its proportions and is never enlarged.
Compress to a specific size
Each page is preset to its limit. Looking for something specific? Try the signature compressor, the passport photo size guide, or the custom size compressor for any other limit.
Tools
- Compress image to KB Shrink a JPG, PNG or WebP to a size limit you choose, with pages for 20, 50, 100, 200 and 500 KB and 1 MB, plus a guide for passport photo uploads. 20 KB50 KB100 KB200 KB500 KB1 MB
- More tools for photos and documents are on the way.