What signature size do SSC and IBPS forms need?

Both commonly require a signature image of 10–20KB at roughly 140×60 pixels in JPEG format. The presets set these exactly.

My signature file is 5KB — is too small a problem?

Yes, some portals enforce a minimum (often 10KB). Presets fix the pixel size, so raise the KB target or use Custom with larger dimensions to land inside the allowed range.

Should I scan or photograph my signature?

Either works. Photograph straight-on in daylight without shadows, or scan at 200–300 DPI. Crop close to the signature before uploading here.

Is my signature image uploaded anywhere?

No — everything runs locally in your browser, which is exactly what you want for something as sensitive as your signature.

Image Tool

Signature Resize 10 to 20KB

Name: Signature Resize 10 to 20KB
Author: Anil Gautam

Resize signature images to 10–20KB with exact dimensions (140×60 etc.) for SSC, IBPS, UPSC, PAN forms.

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Fast and simple

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Drop your image here or click to choose

Files stay on your device — nothing uploads

Written by Anil Gautam · Updated 7 October 2026

How does a signature photo become 140×60 pixels?

Each preset crops from the centre of your image to the preset's shape, then scales the crop to the exact size on a white background. SSC and IBPS are 140×60 at 20 KB, RRB is 140×60 at 30 KB, PAN is 234×128 at 10 KB, and UPSC is a 350×350 square at 20 KB. A 140×60 frame is a wide 7:3 strip, so a full page photographed around a small signature loses most of its height.

A 4000×3000 phone photo fitted to 140×60 keeps the middle 4000×1714 band and drops about 643 pixels from the top and the bottom. Shoot the same page upright, at 3000×4000, and only the middle 1,286 rows survive, about 32 percent of the height. Crop close to the signature first, in roughly the same 7:3 shape (1400×600 pixels is plenty), with the ink centred. For the square UPSC preset, crop to a square instead: a 1400×600 strip sent to it keeps only the middle 600×600 and loses 400 pixels from each end.

Why is the signature file only a few KB?

The tool never pads a file. It picks the highest JPEG quality under the target, and its search tops out near 95 percent. A 140×60 image holds 8,400 pixels; stored raw at 3 bytes per pixel that is 25,200 bytes, about 24.6 KB, and JPEG compresses dark ink on plain paper to a small fraction of that. With a preset selected, a sharper or bigger source photo changes little, because the output is fixed at 140×60.

If a portal also sets a minimum size, more pixels are what raise the number, since quality is already near its ceiling. Custom mode keeps your image's own dimensions, up to 4000 pixels, so it can produce a bigger file, but the result is then no longer 140×60. Use it only when the portal accepts other dimensions.

What should you check before uploading?

Typing in the KB box switches the tool to Custom and drops the preset's pixel size, and Change image clears the preset as well, so select it again for each file. A transparent PNG signature is flattened onto white, which suits forms. The download is named after your file plus the target, such as sign-20kb.jpg; open its properties and confirm 140×60 before you submit.

For signing documents on screen you may want ink on a transparent background instead. The Transparent PNG Maker removes the white paper from a signature image and saves a PNG for that use.

How it works