Exam photo and signature resizer

The portal is checking two numbers, and it will not tell you which one failed

Every recruitment portal in India runs the same silent validation: the pixel dimensions have to match, and the file size has to sit inside a window. SSC wants a photograph of exactly 413 × 531 pixels weighing between 20 and 50 KB. IBPS wants 200 × 230 pixels between 20 and 50 KB. RRB wants 320 × 240 — landscape, which catches almost everyone — between 40 and 100 KB. Miss any of it and the upload is rejected with a message that says "invalid file", which tells you nothing at all.

Nobody else handles the minimum

Here is the part that generic tools get wrong. A KB rule is a range, not a ceiling. If IBPS asks for 10–20 KB and your signature compresses down to 6 KB, it is refused just as firmly as one at 40 KB. Every "compress to size" tool on the internet only understands the ceiling, because outside this world nobody has ever needed a file to be larger.

So candidates open MS Paint, paste the signature onto a bigger canvas, and fail the pixel check instead. This tool handles both ends. It finds the highest JPEG quality that fits under the ceiling, and if the picture still comes out below the floor it pads the file with a JPEG comment block — a segment defined by the JPEG standard that every decoder skips over. The file gets bigger; not one pixel changes. You can verify that yourself by opening both files and comparing them.

Photographs are cropped, signatures are never cropped

A photograph has to fill the frame, so it is scaled up and the overflow is trimmed from the edges — white bars in a passport photo would be rejected on sight. A signature is the opposite case: cropping a signature to 140 × 60 takes the tail off somebody's surname. So signatures, thumb impressions and declarations are scaled to fit and the remaining space is filled with white. You can override either choice if your original is framed unusually.

What each authority actually asks for

UPSC accepts JPG only and refuses PNG and PDF at the upload step, and from the 2026 cycle it asks for three signatures stacked vertically in a single image. NTA publishes no pixel size at all for NEET and JEE — only 10–200 KB — so that preset preserves your photo's own proportions rather than inventing a crop, and caps the long edge at 1200 px so the picture stays sharp at that file size. IBPS asks for four separate uploads: photograph, signature, left thumb impression and a handwritten declaration, each with different rules.

Your photo does not leave your phone

Under 20 MB — which is every photograph a phone produces — the whole job runs in your browser. There is no upload request, so there is nothing for us to keep. That matters here more than on most pages: the file carries your face and it is about to carry your name too.