Signature Resizer: Resize Signature in KB, Pixels and CM

Every government form asks for a signature with its own rules: 10 KB to 20 KB, 140 × 60 pixels, or 2 × 4.5 cm. A normal phone photo is 2–5 MB with grey paper, shadows and lots of empty space. This signature resizer fixes all of it in one screen.

Upload your signature, choose your exam, and the tool crops the blank paper, whitens the background and resizes the signature to the exact KB and pixels. You see a pass/fail checklist before you download, so you know the file fits before the portal tells you it doesn't.

These are the sizes most notifications ask for. Each one is a preset in the tool. Recruiting bodies revise them, so always confirm the numbers in your own notice.

Need exam-specific help? See the IBPS PO, SSC CGL, UPSC CSE, NEET UG, GATE and RRB NTPC signature pages.

1. 1

   Sign and snap

   Sign on plain white paper with a black pen. Photograph it in daylight from straight above.

2. 2

   Upload and pick your exam

   Choose a preset such as IBPS (140 × 60 px, 10–20 KB) or SSC. The tool crops the empty paper automatically.

3. 3

   Fine-tune the look

   Raise Clean background for grey paper and pick Black or Blue ink.

4. 4

   Download the JPG

   When every item in the checklist shows a green tick, click Download JPG and upload it to your form.

Pixels and KB measure different things. Pixels set the width and height of the picture. KB measures the file size. A 140 × 60 pixel signature on clean white paper usually compresses to only 3–8 KB, which is below the 10 KB minimum that IBPS and SSC enforce.

Most resizers only shrink files, so they leave you stuck under the minimum. This tool first uses the highest JPG quality that fits. If the file still falls short, the Reach minimum KB option adds invisible filler data so the file lands inside the 10–20 KB range. The visible signature does not change.

Some notices give the signature size in centimetres. Select Custom size, switch to Centimetres and type the width, height and DPI. The tool uses this formula: pixels = cm ÷ 2.54 × DPI.

• ✓ Use a black or dark blue gel pen. Thin, light pencil strokes vanish when you compress them.
• ✓ Sign larger than usual, around 6–8 cm wide, so the strokes stay sharp after resizing.
• ✓ Shoot near a window and avoid your own shadow on the page.
• ✓ Hold the phone parallel to the paper. Use the rotate buttons if the photo comes out sideways.
• ✓ Sign the same way you will sign in the exam hall. Invigilators compare both signatures.

Never sign in capital letters unless your notice allows it. Most exams reject block-letter signatures.

Banking forms also ask for a left thumb impression and a handwritten declaration. Your passport-size photo goes through our photo resizer, and PAN applicants can use the PAN card photo resizer.

Your signature can authorise documents, so this tool never uploads it. Your browser crops, cleans and compresses the file on your device. You need no account, the tool adds no watermark, and you can resize as many signatures as you like. It works on Android, iPhone, Windows and Mac.