Online Signature Resizer 10 to 20 KB
Eliminate mobile phone shadows, remove grey paper backgrounds, and compress signatures into the exact 10 KB to 20 KB boundary for all competitive exams.
Exact Size & Dimension Lock
Upload Signature
Drag and drop your image here, browse from device, or Ctrl + V to paste from clipboard
100% Secure & On-Device Processing
Your photos, signatures, and identity documents are processed completely inside your browser using local client-side Canvas memory. Nothing is ever uploaded to any cloud server. Safe for all candidates and cyber cafes.
Signature Size Requirements Across All Major Exams
Compare the required signature dimensions and file sizes before uploading to your recruitment portal:
| Examination Board | Required File Size | Dimensions (Pixels) | Dimensions (cm) | Pen & Paper Spec |
|---|---|---|---|---|
| SSC (CGL, CHSL, MTS, GD, CPO) | 10 KB to 20 KB | 400 × 200 px | 4.0 × 2.0 cm | Black ink, white paper |
| Railway RRB (ALP, NTPC, Group D) | 15 KB to 30 KB | 350 × 150 px | 3.5 × 1.5 cm | Dark blue/black ink |
| Banking (IBPS PO/Clerk, SBI PO) | 10 KB to 20 KB | 140 × 60 px | 3.0 × 1.5 cm | Black ink strictly |
| UPSC (Civil Services, NDA, CDS) | 20 KB to 300 KB | Min 350 × 350 px | Square or 4.0 × 2.0 cm | Black ballpoint pen |
| NTA (NEET UG, JEE Main) | 4 KB to 30 KB | 400 × 150 px | 4.0 × 1.5 cm | Black ballpoint pen |
| State Police (UP, Bihar, WB) | 5 KB to 20 KB | 300 × 120 px | 3.5 × 1.5 cm | Clean contrast pen |
How to Capture a Flawless Signature Using Your Smartphone
Avoid costly trips to the cyber cafe by following these 4 golden rules when taking a picture of your signature:
Never sign on lined notebook paper, ruled registers, or colored paper. Use a fresh sheet of unruled white printer paper (A4 standard) for clean separation.
Avoid faint pencils, light ink pens, or fountain pens that bleed into paper fibers. A thick 0.7mm or 1.0mm black ballpoint pen produces the best digital ink scan.
Hold your smartphone parallel to the paper near a window or natural room lighting. Make sure your hand or phone does not cast a dark shadow across the ink.
Keep the "Clean Signature Background" switch turned ON in our tool. It will automatically boost ink contrast and bleach background noise to pure RGB(255,255,255).
Frequently Asked Questions About Signature Resizing
Why do government recruitment portals strictly require signatures between 10 KB and 20 KB? ▾
Government examination servers (like SSC, IBPS, and State PSCs) store millions of candidate records. A 10 KB - 20 KB limit ensures signatures are small enough for database scalability while retaining sufficient resolution for biometric and invigilator signature matching.
How does the background cleaning tool remove shadows from mobile photos? ▾
Our client-side processing engine analyzes luminance variations across the uploaded photo. It flattens uneven shadows, eliminates grey paper tint, and boosts stroke contrast to render pure dark ink over an immaculate white background.
Can I sign in blue ink, or is black ink mandatory? ▾
While some exams accept blue ink, most examination bodies (including SSC, UPSC, and Banking exams) strictly mandate a dark black ballpoint pen on plain white paper. Black ink provides superior optical scanning clarity.
Why are signatures in capital (BLOCK) letters rejected? ▾
Writing your name in full capital letters (e.g. 'RAHUL SHARMA') is considered a name print, not an authentic signature. Examination authorities reject printed letters because they lack unique individual biometric cursive characteristics.
What if my signature file compresses to below 10 KB? ▾
Most portals will reject files under 10.0 KB with an error like 'File size too small'. Our resizer incorporates intelligent lossless padding to guarantee your file always stays comfortably within the 10.0 KB to 20.0 KB range.
Need to Resize Your Passport Photo as well?
Get your passport photo resized and locked between 20 KB and 50 KB: