SSC CGL photo and signature: sizes that pass

Every SSC application season, thousands of forms bounce back for one reason: the uploaded photograph or signature breaks the portal’s image rules. The requirements are short enough to memorise, but meeting them honestly takes a few decisions most guides skip. Here is what the caps actually are, why your files miss them, and how to fix that in two minutes — without installing anything.

What the portal asks for

SSC application forms have used roughly these constants across recent cycles (always confirm against the notice for your year — portals do revise):

Photograph: a live-capture-style passport image, commonly JPEG/JPG, around 20–50 KB minimum and up to ~100–500 KB depending on the year’s notice, at roughly 320×240 to 600×650 pixels.
Signature: scanned signature on white paper, JPEG, commonly 10–20 KB minimum, up to ~50–200 KB, at roughly 275×125 to 350×100 pixels — noticeably wider than tall.
Both uploads must be readable at 100%: faint pencil signatures and shadowed photos are rejected by moderation regardless of file size.

Why uploaded files fail

Three failure modes dominate, and only one of them is really about KB:

Dimensions, not bytes. A 4000×3000 photo from your phone is refused even at 30 KB because the portal wants passport-style framing. Crop to the required pixel ratio first; bytes then mostly take care of themselves.
Too big. A fresh JPEG at that pixel size is 1–3 MB. This is the case a compression tool solves directly — re-encode at a quality that lands under the cap.
Too small. Yes, caps are two-sided: some portals reject photos below ~20 KB because pre-compressed files arrive pixelated. If your photo lands at 12 KB, re-crop tighter with a higher-quality source instead of inflating the file.

Hitting the cap honestly

Compress to 20 KB handles the signature side: drop the scan in, the target is preselected, and the result card reports the measured output size — if the cap is genuinely met it says so, and if it is not, it hands you the best reachable size with the reason (usually lost detail in a low-contrast signature).

For the photograph, the 50 KB target is the middle of the usual band. Two practical notes:

Crop before compressing. Cropping to passport framing after compression destroys the detail you paid bytes for.
Watch the quality, not just the number. The compressor’s before/after slider is there precisely so you can confirm the face is still perfectly clear at 100% — moderators zoom in.

The one thing to remember

The portal checks dimensions first, bytes second, readability last. Fix them in that order — crop, compress, verify — and your photo and signature pass the first time.

This guide covers the general mechanics of exam-form uploads. Always follow your specific notification’s stated pixel sizes and KB bands — they win over any generic guide, including this one.