A signature upload is small but fussy: too big and the form rejects it, too small and it also rejects it. Here’s how to land in the 10–20 KB sweet spot.
Step 1 — Capture a clean signature
Sign on plain white paper in black ink. Photograph or scan it in even light, avoiding shadows. A higher-resolution capture gives the compressor more to work with and helps you stay above the minimum size.
Step 2 — Crop and set the dimensions
Most forms want 140×60 px (check yours). Crop tightly around the signature so there’s little empty space, then set the exact width and height. Keep the background white.
Step 3 — Hit the 10–20 KB range
Open the Signature Resize Tool, set the size target to 20 KB, and the tool compresses to at or below 20 KB while the validator confirms it’s also above 10 KB. Download the JPG.
Common signature specs
| Exam | Size (px) | File size |
|---|---|---|
| SSC CGL / CHSL | 140×60 | 10–20 KB |
| Bank (IBPS / SBI) | 140×60 | 10–20 KB |
| GATE | 250×80+ | 3–300 KB |
| UPSC (×3 stacked) | ~350×500 | 20–100 KB |
For exam-specific presets that lock everything in one click, see SSC CGL Signature or the full photo & ID presets.