"Photo must not exceed 50KB." "Scan should be under 200KB." If you've filled out a university admission form, a government job application, or a visa portal, you've hit this wall — and a normal compressor with a quality slider just doesn't hit an exact number reliably.
Why forms are this strict
Government and university portals are often built on older infrastructure with tight storage and bandwidth budgets, especially when thousands of applicants are uploading photos and scans at once. A hard KB limit is the simplest way for them to control that load — but it puts the burden of hitting an exact number on you.
Why "just drag the slider" doesn't work
Most compressors let you pick a quality percentage and hope for the best. The actual output size depends on the image's content — a busy, detailed photo compresses differently than a plain one — so 70% quality might produce 80KB for one photo and 130KB for another. Guessing your way to an exact limit wastes time, especially under a submission deadline.
The better way: search for the right quality automatically
SNTools' Compress to Target KB tool does this for you. Type your target size — or pick a common preset like "Admission form photo — 50KB" — and it tests compression quality levels until it lands at or just under your target, then stops. No guessing.
Common KB targets in Pakistan
- Passport photo uploads — often 20KB
- University admission form photos — commonly 50KB
- General portal uploads — 100KB
- Government job application scans — around 200KB
- CNIC or domicile scans — up to 500KB
FAQ
Can it hit the exact number every time?
It gets as close as possible without exceeding your target — typically within a few KB, since JPG compression works in discrete quality steps.
Does it work on PNG files?
Yes — PNGs are compressed using quality-based encoding internally to reach small targets, since PNG's own lossless compression usually can't get small enough for tight limits.
Try it yourself, free
Hit an exact KB target automatically — free, private, no server upload.