Resize a Signature Image to 10KB or 20KB

Most application forms that ask for a photo also ask for a scanned signature — usually with an even tighter size limit, often 10KB to 20KB, sometimes with a minimum size too (so it isn't left blank or too small to read).

Why signatures are harder to compress well than photos

A signature scan is mostly flat white with thin dark strokes — the opposite of a photograph. Heavy JPEG compression can introduce blocky artefacts around the thin lines, making a signature look broken or fuzzy even at a size that would look fine on a photo. A little extra care in scanning helps more than any compression setting.

Step by step

1. Sign on plain white paper with a dark pen — blue or black, avoid thin gel pens that scan faint.
2. Scan or photograph it with good even lighting, then crop tightly to just the signature with a small margin.
3. Open the resizer, choose Target KB mode, and enter your form's exact number — commonly 10KB or 20KB.
4. Set Max dimension to 500px — a signature doesn't need more resolution than that, and a smaller canvas leaves more of your KB budget for quality.
5. Drop the image and check the result. If it looks broken up, the original scan likely has too much background noise — try rescanning with better lighting rather than compressing harder.

Common limits by form type

• SSC and most state PSC forms: signature 10–20KB, dimensions often specified (e.g. 140×60px)
• UPSC: signature under 20KB, size 3.5cm × 1.5cm
• Bank account / KYC forms: usually 10–50KB, format JPG

Always check your specific form's instructions for exact pixel dimensions — some ask for both a KB cap and an exact width × height, which Pixels mode on the resizer can also produce with an optional KB cap.