Why your exam photo or signature gets rejected
Most rejections come from a handful of causes: the file is the wrong size, the wrong shape, the wrong format, or the picture itself breaks a rule in the notification. Here is how to tell which one you hit, and how to fix it.
A portal checks three things the moment you upload: file size in KB, pixel dimensions and file format. A miss on any of them is rejected on the spot. Problems with the picture itself (background, face, signature in capitals) are usually caught later, when the form is scrutinised, which is worse because it can cost you the application. Check both before you submit.
The two kinds of rejection
Instant rejection at upload. The portal's software reads the file and refuses it. These errors are mechanical: too many or too few kilobytes, the wrong width and height, or a format the portal does not accept. The message is often vague, but the cause is always one of those three.
Rejection at scrutiny. The upload went through, but a person or a later check finds the image breaks a rule in the notification: a blurred face, a dark background, a signature in capital letters, or a photo with the photo and signature swapped. This can lead to the application being rejected after the last date, when you can no longer fix it. That is why the second half of this guide matters as much as the first.
Upload errors and what they mean
Portals word these messages differently. The meaning is what matters.
| What the portal says (roughly) | What is actually wrong | Fix |
|---|---|---|
| File size exceeds limit | Too many KB. A phone photo is usually several megabytes, far above the 20 to 50 KB most forms allow. | Compress to a target inside the range, not just "smaller". |
| File size below minimum | Too few KB. Some forms set a floor as well as a ceiling. | Re-export at a higher quality, or start from the original photo rather than a compressed copy. |
| Invalid dimensions / resolution | The width and height in pixels are outside what the form allows. | Resize to the exact pixels in the notification, cropping rather than stretching. |
| Invalid file type / format | The file is PNG, HEIC, WEBP or PDF, or has a JPEG name but not JPEG data. | Convert to a real JPEG. Renaming the extension does not convert the file. |
| Upload failed / try again | Often a session timeout or an unusual file name, not the image itself. | Rename the file to plain letters and numbers, log in again and retry. |
1. The file is too large in KB
This is the most common error. A modern phone camera saves photos of several megabytes, and a form commonly allows 20 to 50 KB for a photo and 10 to 20 KB for a signature. Lowering the size in a gallery app one step at a time tends to undershoot or overshoot, and repeated re-saving makes the image blotchy.
The reliable fix is to set the pixel dimensions first and then compress to a KB target inside the allowed range. Fewer pixels need fewer kilobytes, so the picture stays clear. Our size guides list the range for each exam, for example the SSC photo and signature size and UPSC photo and signature size.
2. The file is too small in KB
Some forms set a minimum as well as a maximum. A photo compressed down to 8 KB fails a form that wants 20 to 50 KB, even though it is "small enough". This usually happens when someone compresses an already compressed image, for example one saved from WhatsApp, which recompresses images it sends. Start again from the original photo and aim for the middle of the range.
3. The pixel dimensions are wrong
Some notifications give pixels and some give centimetres. The two are linked by the resolution (DPI) the image is saved at: pixels = centimetres ÷ 2.54 × DPI. A 3.5 × 4.5 cm photo works out to about 138 × 177 pixels at 100 DPI and 276 × 354 pixels at 200 DPI. When a form gives only centimetres, keep the 3.5 : 4.5 shape and check whether it also states a pixel range.
Do not stretch an image to fit. Crop it to the right shape first, then resize, or the face will look squashed and may fail scrutiny.
4. The format is not JPEG
Most exam portals accept only JPG/JPEG. iPhones save photos as HEIC by default, screenshots are usually PNG, and some apps share images as WEBP. Changing .png to .jpg in the file name does not change the data inside, and a strict portal will still refuse it. Convert the file properly; PhotoResizer always exports a real JPEG.
5. The background or lighting breaks the rules
Notifications commonly ask for a light, plain background with the face clearly visible and no shadows. A photo taken against a patterned wall, in a dim room or with a strong light behind you can pass the upload check and still be rejected at scrutiny. Stand facing a window in daylight, in front of a plain light wall.
6. The face is too small, cut off or covered
Exam photos are meant to identify you. A full-body shot cropped down, a face turned to one side, sunglasses, a cap, or hair covering the eyes can all fail. Frame the photo from the top of the shoulders to just above the head, looking straight at the camera. Remove glasses if they reflect light, unless the notification says otherwise.
7. The photo is old or missing a required name and date
Some notifications require a recent photo, and some require your name and the date the photo was taken printed below it. Check your notification for this before you take the picture. If it is required, add it at the bottom of the photo, not over the face.
8. The signature is in capital letters or unreadable
Several boards, including the banking exams covered in our IBPS guide, reject a signature written entirely in capital letters. Sign in your normal running hand. A signature compressed too far can also break into faint dots, and one photographed on lined or coloured paper can be rejected as unclear. Our guide on how to photograph a signature covers this step by step.
9. The photo and signature are swapped or duplicated
When both uploads have the same limits, it is easy to put the signature in the photo slot or upload the same file twice. Name the files clearly, for example photo.jpg and signature.jpg, and check the preview on the form before you submit.
10. Other uploads have their own rules
Many forms also ask for a left thumb impression or a handwritten declaration, each with its own size and format. Treat them as separate uploads, not as copies of the signature settings. See the thumb impression and handwritten declaration guides.
Checklist before you click submit
- Read the image section of your notification and note the KB range, pixel or cm size, format and any extra rule such as name and date.
- Start from the original photo, not a forwarded or screenshotted copy.
- Crop to the right shape, then resize to the exact pixels.
- Compress to a KB value inside the range, ideally near the middle.
- Export as JPEG and give each file a plain, clear name.
- Check the preview on the form: right image in the right slot, face clear, signature readable.
Frequently asked questions
Why does the portal say my photo is invalid when it looks fine?
Upload checks read the file, not the picture. The KB size, the pixel dimensions or the format is outside what the form allows. Check all three against the notification.
Can I just rename a PNG or HEIC file to .jpg?
No. Renaming changes only the name, not the data inside. Convert the image to a real JPEG before you upload it.
How do I convert centimetres to pixels for an exam photo?
Pixels equal centimetres divided by 2.54, multiplied by the DPI. A 3.5 x 4.5 cm photo is about 138 x 177 pixels at 100 DPI and 276 x 354 pixels at 200 DPI.
Why is my photo too small in KB after compressing?
It was probably compressed more than once, for example after being sent on WhatsApp. Start again from the original photo and compress once to a value inside the allowed range.
Can a photo be rejected after a successful upload?
Yes. Background, face visibility, a missing name and date, or a signature in capital letters can be caught during scrutiny after you submit. Check those before you submit.
Related guides
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