About resize photo to kb
Online forms for jobs, exams, scholarships and KYC often reject photos above a size limit such as 50 KB or 200 KB. This guide explains what controls a photo's file size and how the tool reaches a target without ruining the picture.
What decides a photo's file size
File size depends on three things: the pixel dimensions, the format and the compression quality. A 12-megapixel phone photo can be 4 MB or more. Halving its width and height removes about three quarters of the pixels, and lowering JPG quality shrinks it further.
How the tool hits your target
For JPG output the tool searches for the highest quality that still fits under your target by repeatedly halving the quality range. Only if no quality fits does it reduce the dimensions by about 15% and try again. If the target still cannot be reached, it gives you the closest result and says so, instead of failing silently.
Tips for better results
- Start from the original photo, not a screenshot or a copy that was already compressed.
- Choose JPG for photographs. PNG can only shrink by reducing dimensions, so it needs far smaller sizes to reach the same KB.
- If a form also asks for exact pixel dimensions, enter the width and height. The photo is centre-cropped to fill that box.
- Check the form's own instructions for the accepted format and size range, because some portals also set a minimum size.
Privacy
The photo is processed with your browser's canvas. It is never uploaded, which matters for ID photos and signatures.
