Reduce Image Size in KB — Free Online
Reduce an image to a target size in KB by tuning the quality slider. The before/after panel shows the exact size in KB, so you can iterate until the file fits a specific cap.
Common KB targets
Government forms often cap at 100 KB or 200 KB. Online listing platforms cap at 500 KB or 1 MB. Quality 50-60 typically lands a phone photo in the 200-400 KB range; quality 70-75 lands it in 500-800 KB.
Hitting an exact size
Compress, check the After size, drop the slider another 5-10 points if it is over target, recompress. Two iterations usually hit any sensible KB target.
Frequently asked questions
Can I target 100 KB exactly?
Yes. Compress at quality 50 to start, then keep dropping the slider 5 points and recompressing until After is under 100 KB.
Is it actually free?
Yes. No signup, no daily cap on normal personal use, no watermark on the output. Display ads keep the site free.
Does it work on a phone?
Yes. The upload box opens the camera roll on mobile browsers directly.
What happens to my photo?
Uploads are processed to return a download link and removed automatically within an hour. We do not view, share, or sell your files.