How to get your photo and signature right for an online application
By the PdfDady team · Updated · 7 min read
Every online application form tells you exactly what it wants for the photo and signature, usually in a section of the notification that most people skip. Read that section, write down four things (format, pixel or cm size, minimum KB, maximum KB) and make your files match all four. Almost every rejection comes from matching one or two and missing the rest.
You can set all of those in one go with our Image Resizer: dimensions in pixels, cm, mm or inches, plus a maximum file size in KB. It shows you the final KB and pixel size before you download, and the image stays on your device.
Reading the notification properly
Search the notification PDF for "photograph", "signature" or "scanning". The relevant section is often near the "How to apply" part or in an annexure. Here is what to pull out:
- File format. Nearly always JPG or JPEG. A PNG or an iPhone HEIC file will be refused.
- Dimensions. Given in pixels (like 200 × 230) or in centimetres (like 4.5 cm × 3.5 cm). Some say "preferred", some say nothing at all.
- File size range. Note the minimum as well as the maximum.
- Content rules. Background colour, glasses, caps, how recent the photo must be, ink colour for the signature.
- Anything extra. Some forms want more than a photo and signature.
To show how much this varies, here is what three 2026 notices ask for:
| IBPS CRP PO/MT-XVI | SSC CHSL 2026 | UPSC CSE 2026 | |
|---|---|---|---|
| Photo | 200 × 230 px (preferred), 20–50 KB, plus a live photo | Captured live in the application module | Uploaded photo plus a live photo |
| Signature | 140 × 60 px (preferred), 10–20 KB | JPEG, 10–20 KB, about 6.0 × 2.0 cm | Three signatures, one below the other, black ink |
| Other uploads | Left thumb impression, handwritten declaration, 10th certificate | Disability certificate, if claiming PwBD benefits | Details on upsconline.nic.in |
The point isn't to memorise these. It is that two forms in the same year can want completely different files, so a photo that worked for one may be wrong for the next.
Pixels, KB and cm are three different things
People often treat these as the same measurement. They aren't.
Pixels are the image's actual width and height. A portal can check them exactly. "200 × 230 pixels" means the image has 200 columns and 230 rows of dots, whatever device it's on.
KB is the file size on disk. It depends on the pixels and on how the JPG is compressed. Two images of 200 × 230 pixels can differ several times over in KB, depending on the JPG quality and how much detail is in them.
Centimetres describe a printed size. On a screen, cm only means something once you also know the DPI (dots per inch), which links pixels to physical size.
So when a notice says "4.5 cm × 3.5 cm" for a digital photo, it is really describing the shape and rough scale. In the Image Resizer, choose cm, enter the size, and pick a DPI of 100, 150, 200 or 300. The tool converts that to pixels and writes the DPI into the JPG.
The DPI myth
A common belief is that a photo "must be 300 DPI" to be accepted, or that changing DPI makes an image sharper. Neither is true for an upload.
DPI is a label stored in the file. It tells a printer how big to print the pixels. Changing the label from 72 to 300 without changing the pixels leaves the image exactly as sharp, and exactly the same on screen. What a portal can check is pixels and KB.
Where DPI does matter is when you scan. IBPS tells candidates to set the scanner to a minimum of 200 dpi and true colour, then crop. That is about capturing enough detail from the paper in the first place. It's good advice, but it is not about the number written in the final file.
When a notice gives cm and also mentions a DPI, use that DPI in the tool. When it gives cm with no DPI, 200 DPI is a sensible middle choice, and it's the tool's default.
Making each file
Photo. Use a recent, well-lit, front-facing photo against a light background. If the notice wants pixels and KB, set both in the Image Resizer. If it only gives a KB ceiling, the Resize Image to 50 KB or Resize Image to 20 KB pages are quicker because the limit is already set. When the shape in the notice differs from your photo, unlock Keep proportions and use Crop & position. The photo is cropped, never stretched.
Signature. Sign on white paper with a dark pen, photograph it in daylight, and run it through the Signature Resizer, which trims the blank paper and whitens the background. Our guide to signature size for online forms goes into detail.
Live photo. Several forms now take a photo through your webcam or phone during the application. SSC's CHSL notice asks you to find good light and a plain background, keep the camera at eye level, look straight ahead, and not wear a cap, mask or glasses. It also warns that photographing an existing photo will get the application rejected. No resizing tool is involved here, so preparation is all about the room and the light.
Keep the original files. Resize a fresh copy for each form instead of resizing an already resized file.
Why applications get rejected
These are the problems the notices themselves warn about, plus a few plain mismatches:
- Below the minimum KB. A 15 KB photo on a form that wants 20–50 KB. Our tools never pad files, so raise the pixel size a little and check again.
- Right KB, wrong dimensions. The portal checks pixels too.
- Photo and signature swapped. Easy to do when both files sit in Downloads with similar names. Rename them before you upload.
- Blurry or tiny signature. SSC rejects "blurred/miniature" signatures.
- Signature in capitals, where the notice forbids it.
- Cap, dark glasses or a busy background in the photo. IBPS says caps, hats and dark glasses are not acceptable, and that religious headwear must not cover the face.
- Glare on glasses. IBPS says that if you wear glasses, there should be no reflections and your eyes should be clearly visible.
- Old photo. IBPS asks for a recent photo, and SSC says your appearance in the exam should match the photo in the application.
After uploading, most portals show a preview. Look at it carefully before you pay the fee or submit.
Questions people ask
Can I use the same photo for every form?
The same original, yes. The same resized file, often not, because sizes differ. Keep one good original and make a fresh copy for each form.
My notice gives cm but the portal asks for pixels. What do I enter?
Enter the cm size with the DPI the notice mentions, or 200 if it mentions none, and the tool converts it. Then check the result against any pixel figure the portal shows.
Can I use a passport photo from a studio?
Usually, if it meets the notice's rules. Get a digital copy from the studio rather than photographing the print, since photographing a print adds glare and blur. Our passport photo size guide covers framing.
Does PdfDady check my photo against the exam's rules?
No. The tools resize, crop and compress. They don't detect faces, check backgrounds or know any exam's requirements. That judgement stays with you and the notice.