Why your exam form keeps rejecting your photo or signature

You resize the photo, upload it, and the portal refuses it again — usually with a message as useless as "Invalid image" or "Please upload a valid photograph". No indication of what is actually wrong.

There are seven reasons these uploads fail, and the error message almost never tells you which one you have hit. Here they are, in roughly the order they catch people.

1. The file is too small

This is the one almost nobody expects, and it is the most common cause of a signature being rejected over and over.

Indian recruitment forms specify a range, not a ceiling: 20 to 50 KB for a photograph, 10 to 20 KB for a signature. A file below the minimum is rejected exactly as firmly as one above the maximum. And a signature — black strokes on white paper — compresses so efficiently that an ordinary compressor will happily take it down to 4 or 5 KB, sailing straight under the floor.

The candidate then does the natural thing: compresses harder. Which makes it worse. Every general-purpose image compressor is built to make files smaller and has no concept of a minimum, so the tool you are using cannot solve the problem you actually have.

2. The dimensions are wrong

SSC and IBPS specify exact pixel sizes — 200 × 230 for a photo, 140 × 60 for a signature — and portals check them. "About right" is not right.

Worse, a photo at the wrong proportions that gets scaled to fit comes out stretched. A phone photo is 3:4; an exam photo box is 200:230. Scaling one into the other squashes the face noticeably, and a distorted face invites rejection at document scrutiny even if the upload succeeds. The fix is to crop to the correct proportions first, then scale.

3. It is not actually a JPEG

Almost every form wants JPG or JPEG. A PNG renamed to .jpg is still a PNG inside, and portals that inspect the file properly will reject it — which produces the maddening situation where the file "is" a .jpg and still fails.

Convert properly rather than renaming. Screenshots are the usual culprit here, since phones and computers save them as PNG by default.

4. Block capitals in the signature

SSC, IBPS and NTA all state explicitly that a signature written in capital letters will not be accepted. This is not a formality — it is checked at document scrutiny, and it gets candidatures cancelled.

Sign in your normal running handwriting. And sign the way you actually sign: at the examination centre your signature on the attendance sheet is compared with the one you uploaded, so a careful one-off that you cannot reproduce under pressure is a liability rather than an asset.

5. The background isn't plain

After size errors, this is the most common rejection at scrutiny. Boards ask for a plain light or white background, and a patterned wall, a doorway, a curtain or another person in the frame all fail.

There is a practical bonus to getting this right: a plain background compresses far more efficiently than a busy one, so the same photograph against a white wall lands comfortably inside the KB range while the cluttered version needs heavy compression to fit. Fixing the background often fixes the file size at the same time.

6. The photograph is too old, or breaks a rule you didn't read

These vary by board and are easy to miss:

• SSC — taken within the last three months; no cap and no spectacles.
• IBPS — within the last six months; a proper photograph, not a selfie.
• NTA / NEET — taken on or after a stated date for that cycle; some cycles require your name and the date printed along the bottom.
• UPSC — face filling around 75% of the frame, eyes open, natural expression with no smile.

Reusing the photo from an application two years ago is a false economy.

7. You compressed a file that was already compressed

Each JPEG save discards detail permanently. Compress an already-compressed photo and the damage compounds — blocky patches in skin tones, fuzzy halos around edges. Do that three or four times while trying to hit a limit and the result is a face nobody can verify against the person sitting in the examination hall.

Always go back to the full-size original and produce the final file in one step. Keep that original somewhere safe: you will apply for more exams, each with slightly different limits, and starting fresh each time is the difference between a clean photograph and a smeared one.

The order that works

If you take nothing else from this: the sequence matters more than the tool.

1. Start from the original, not from a file you already tried to fix.
2. Crop to the right proportions — and tightly, for a signature.
3. Resize to the exact pixel dimensions your form specifies.
4. Compress into the range — under the maximum and over the minimum.
5. Look at the result at full size before uploading. If you cannot read the fine detail, neither can the person checking it.