Online Signature Resizer & Background Cleaner
Compress signature between 10 KB to 20 KB, convert paper shadows to pure white, and set 140x60 px dimensions.
Click to Upload Signature or Thumb Impression
Supports JPG, PNG (Photos taken with phone camera)
📐 Target Size & Dimensions
🖼️ Signature Preview
✍️
Upload a signature photo to remove paper shadows & optimize for govt portal.
Official Guidelines for Signature Upload in Government Recruitment Portals
A common reason for rejection in SSC CGL, UPSC Civil Services, IBPS Clerk/PO, and State PSCs is an illegible signature, a dark grey background from a smartphone photo, or a file exceeding the 20 KB limit. Candidate signatures must be sharp, clear, and properly cropped on a clean white background.
📌 Signature Upload Specifications
- Standard Dimensions: 140 px width × 60 px height (4 cm × 2 cm).
- Target File Size: Strictly between 10 KB and 20 KB (JPG/JPEG).
- Ink Color: Black or Dark Blue ink on plain unlined white paper.
- Capital Letters: Signatures in all CAPITAL letters are strictly prohibited.
✨ Why Background Cleaning Matters
When taking a phone snapshot of a paper signature, ambient shadows often make the background look grey or mottled. Recruitment portal scanners can misinterpret these shadows as part of the signature. Our auto-clean algorithm converts all paper shadows into pure 100% white while sharpening the ink strokes.
Official Govt Exam Signature Specifications Table
Mandatory dimensions and file size limits for signatures and thumb impressions across major examinations.
| Exam / Board | Doc Type | Dimensions (cm / px) | File Size Limit | Special Rules |
|---|---|---|---|---|
| SSC CGL / CHSL / MTS / GD - SignatureSSC | signature | 4 × 2 cmRatio: 7 : 3 | 10 KB – 20 KB | Background: White |
| UPSC CSE / NDA / CDS - SignatureUPSC | signature | 350 × 350 pxRatio: 1 : 1 | 20 KB – 300 KB | Background: White |
| IBPS PO / Clerk / SBI - SignatureBanking | signature | 140 × 60 pxRatio: 140 : 60 | 10 KB – 20 KB | Background: White |
| IBPS / SBI - Left Thumb ImpressionBanking | thumb | 240 × 240 pxRatio: 1 : 1 | 20 KB – 50 KB | Background: White |
| RRB NTPC / Group D / ALP - SignatureRailways | signature | 200 × 80 pxRatio: 5 : 2 | 30 KB – 70 KB | Background: White |
| NTA NEET / JEE Main - SignatureNTA | signature | 140 × 60 pxRatio: 140 : 60 | 4 KB – 30 KB | Background: White |
| State Police / PSC - SignatureState Exams | signature | 140 × 60 pxRatio: 140 : 60 | 5 KB – 20 KB | Background: White |
| Standard Signature (Max 20 KB)General | signature | 140 × 60 pxRatio: 140 : 60 | 5 KB – 20 KB | Standard format |
* Specifications are verified against latest recruitment advertisements from SSC, UPSC, IBPS, Railway Recruitment Boards, and State PSCs.
📋 How to Use This Tool in 3 Easy Steps
Upload Signature Photo
Take a clear smartphone photo of your signature on unruled white paper and upload it.
Auto-Clean Background & Adjust KB
Use the paper whitening slider to remove yellowish shadows and adjust target size (e.g. 10–20 KB).
Download Ready Signature
Download your optimized, high-contrast signature ready for direct upload to SSC, UPSC, and IBPS forms.
❓ Frequently Asked Questions
What is the required signature size for SSC and IBPS Banking forms?▼
SSC and IBPS exams require signatures strictly between 10 KB and 20 KB with pixel dimensions of 140 pixels (width) × 60 pixels (height) or approximately 4.0 cm × 2.0 cm.
How does the background whitening feature work?▼
When you photograph a signature with a mobile phone, room lighting and shadows often cause the paper to appear dull, grey, or yellow. Our thresholding filter lifts all background pixels to pure 100% white while boosting black/blue ink contrast, preventing rejection during portal document verification.
Should I sign in black ink or blue ink for govt exams?▼
Most recruitment boards (like SSC and IBPS) strongly advise signing with a black ink pen on white unruled paper for maximum scan clarity.
Can I also resize Left Thumb Impressions (LTI)?▼
Yes. For Banking and Railway recruitments requiring Left Thumb Impressions, select the "IBPS / SBI - Left Thumb Impression" preset (240 × 240 px, 20–50 KB).
Are candidate signatures uploaded to your servers?▼
No. All image filtering, background cleanup, and file compression happen 100% locally inside your web browser. Your signature is never stored or transmitted across the internet.
✓ Privacy Guarantee:All processing happens 100% locally in your web browser. No photo, signature, or document is ever uploaded to any server.