Free for Windows 10 and 11 · works offline
Compress a photo to under 100 KB on Windows
Job portals, exam forms and government sites often say “maximum 100 KB”. Instead of guessing a quality, tell S Converter the limit: it finds the best quality that fits and only shrinks the picture if it has to.
How to do it with S Converter
- Open S Converter and choose Images (or Compress to keep each file’s own format).
- Drag in your photos.
- On the right, switch Quality to Max size and pick 100 KB, or Custom… for any other limit.
- Press Convert. Each photo is saved under the limit, next to the original.
Or one click: Under 100 KB
- Select the photos in File Explorer and press Ctrl + Alt + C.
- Press Tab for the Presets page and click Under 100 KB.
The shortcut works while S Converter is running (it waits in the system tray). In the version from GitHub you can also right-click files and choose S Converter; on Windows 11 it's under Show more options.
Why S Converter
Best quality that fits
S Converter searches for the highest quality under your limit, not a fixed low setting.
Any limit
50 KB, 200 KB, 240 KB, 1 MB or a number you type.
Private
Your ID photos and documents never leave your PC.
Questions
What if the limit is impossible?
S Converter saves the smallest version it can make and tells you, so you can pick a larger limit or a smaller picture.
Can I do a whole folder?
Yes. Every photo in the batch is made to fit the same limit.
Does it work for PNG?
Yes. Choose Compress to keep PNGs as PNG, or Images with JPG for the smallest files.
Related guides
Get S Converter
Free, no ads, no account. Images, video, audio, documents, PDFs and archives, all converted on your own PC.