TNPSC signature compressor — 413 × 177 px, 10–20 KB
Resize a signature to the 3.5 × 1.5 cm size the TNPSC portal accepts.
Drop your file here
Processed securely and deleted within the hour.
3.5 by 1.5 centimetres, which is 413 by 177 pixels
TNPSC publishes its signature requirement in centimetres rather than pixels: 3.5 cm wide by 1.5 cm tall. At the 300 DPI that scanned documents are normally handled at, that works out to 413 × 177 pixels, and the file has to land between 10 and 20 KB. The photograph is a separate upload capped at 40 KB, with no published pixel size — that preset is in the list above too.
A signature is padded, never cropped
3.5 × 1.5 cm is a wide, shallow strip, and a signature written across a sheet of A4 is usually wider still relative to its height. Fitting it by cropping would take the ascenders off the top and the descenders off the bottom — the loops of a Tamil or Latin signature are exactly the parts that get lost. So the signature is scaled until the whole of it fits and the remaining space is filled with white. Nothing is trimmed.
Scan it properly and the rest is easy
Sign in black or blue ink on plain unruled white paper. Photograph it square-on in daylight, or scan it at 300 DPI — do not photograph it at an angle, because a signature rendered into a 413 × 177 strip from a skewed photograph looks stretched at one end. If your scan has a wide white border around a small signature, run it through the signature resizer with trimming on first, which crops to the ink so the signature fills the strip rather than sitting small in the middle of it.
Under 10 KB is a failure too
A clean black-on-white signature at 413 × 177 compresses very well, and it is entirely normal for it to land at 6 or 7 KB — below TNPSC's floor. Rather than leaving you to make the file bigger by hand, it is padded with a JPEG comment block, which raises the file size and leaves every pixel exactly as it was.
Runs in your browser
Your signature is processed on your own device and is not uploaded anywhere.
Common questions
Why was my photo rejected when it was under the size limit?
Almost always because it was under the minimum instead. SSC asks for 20–50 KB, so a 12 KB photo fails. Portals rarely say which end you missed. This tool checks both.
Does padding the file to reach the minimum damage the photo?
No. The padding is a JPEG comment segment, which is part of the format and is skipped by every decoder. The pixels are bit-for-bit identical to the unpadded version — only the file size changes.
Which preset should I use for NEET?
NTA — passport photo, for the main upload. NEET also asks for a 4 × 6 inch postcard photograph, which has its own page: the postcard photo maker.
Can I use a PNG or a screenshot?
Drop in anything and you get JPG back, which is what UPSC and NTA require. They refuse PNG and PDF outright at the upload step, so converting first is not optional.
My photo is smaller than the required size — is that a problem?
You are told when it happens. The image is enlarged so the portal accepts it, but it will look soft, and it is the same photo that gets printed on your admit card and checked at the exam centre. A higher-resolution original is worth finding.
Does the exam board also require my name and the date on the photo?
NTA does, for NEET and JEE. Several state boards do too. Use the add name and date tool first, then bring the result back here to hit the size window.