Photo Size ReducerA 100 KB limit is common on job sites, exam portals and profile fields. You can compress image to 100KB with any of the three popular photo formats, but they do not behave alike. Here is how they compare for a normal photograph.
Anyone who wants to reduce image size to 100KB, resize photo to 100KB for a form, or find a JPEG compressor that produces a clean 100KB image should start with the format question.
JPG
Made for photos. It stores an approximation of the picture and throws away detail your eye rarely notices. That is why a 4 MB phone photo can become 100 KB and still look fine on a screen. It has no transparency, so transparent areas are filled with a solid colour.
For a 100 KB limit, this is the safe choice, and it is what this tool produces.
PNG
Made for graphics, screenshots and anything that needs sharp edges or transparency. It keeps every pixel exactly, which is why photos saved as PNG are so heavy. A phone photo saved as PNG can easily be many megabytes. Trying to squeeze that to 100 KB without changing the format means shrinking the picture drastically.
If you have a PNG photo, saving it as a JPG first is nearly always the better path to 100 KB.
WebP
A newer format that can be smaller than JPG at similar quality. The catch is support. Plenty of upload forms and older systems only accept JPG or PNG, and a WebP file is rejected outright. It is fine for your own website. It is a risk for a form.
Which one to pick
For a form or application with a 100 KB limit, choose JPG. For your own website where you control the pages, WebP can save weight. For a logo or an image with text, PNG keeps edges sharp, though the size limit may be harder to meet.
Doing it here
Drop your file, of any of these three types, into the tool above. Keep the target at 100 KB and press Compress. The tool saves a JPG, tries a range of quality levels and keeps the best one that fits. If needed it shrinks the dimensions too. The picture stays on your device.
Some forms count in slightly different units, so if you are right on the edge, try 95 instead.
If your form has a different limit, see 70 KB or 150 KB. If you would rather compress many images at once from your phone, the Android app does that and works offline.