Online Signature Resizer in KB & Pixels
Resize and crop signatures to exact dimensions and file size limits (10KB - 20KB) for all online application forms.
Strict 100% In-Browser Binary Compression
Tested on 50+ official Indian exam engines (SSC, UPSC, IBPS, NTA, Passport Seva). Zero server upload, zero data collection.
Signatures are one of the most common upload failures on online application portals due to strict pixel dimensions (e.g. 140x60 px) and file size caps (10KB to 20KB). Our Online Signature Resizer tool gives you pixel-precise cropping, contrast enhancements, and exact KB targeting in one click.
How to Online Signature Resizer in KB & Pixels
- 1Upload a picture of your signature taken from your phone.
- 2Crop closely around your signature using the interactive crop tool.
- 3Set exact pixel dimensions (e.g., 140x60 px) or file size limit (20 KB).
- 4Download your perfectly resized signature ready for form submission.
Target Specifications
Official Portal Upload Criteria Comparison
| Exam / Portal Name | Photo Limit | Signature Limit | Dimensions | Required Format |
|---|---|---|---|---|
| SSC (CGL/CHSL/MTS) | 20 KB - 50 KB | 10 KB - 20 KB | 3.5 x 4.5 cm | JPG / JPEG |
| UPSC Civil Services | 20 KB - 300 KB | 20 KB - 300 KB | 350x350 px min | JPG / JPEG |
| IBPS Bank Exams | 20 KB - 50 KB | 10 KB - 20 KB | 200x230 px | JPG (Black Ink) |
| NEET / JEE (NTA) | 10 KB - 200 KB | 4 KB - 30 KB | 4x6 Postcard | JPG / JPEG |
How Client-Side Image Binary Compression Works Under the Hood
When you select a target size (e.g., 20KB or 50KB), ResizeInKB executes an in-browser binary search algorithm using the HTML5 HTMLCanvasElement.toBlob() API. It dynamically adjusts JPEG quantization matrices and pixel dimensions directly inside your browser's V8 JavaScript engine memory. Because no HTTP requests send image data across the network, your processing is instant, works offline, and keeps your private photos completely secure.