Online Signature Resizer & Compressor (10 to 20 KB / 4 to 30 KB)
Crop, adjust dimensions, remove background paper shadows, and compress your scanned signature to exact KB limits (10–20 KB, 20–50 KB, 4–30 KB) for SSC, UPSC, NTA, IBPS, and State PSC applications.
275 x 354 px (3.5x4.5 cm), 20-50 KB, without cap/glasses
Interactive Precision Cropper
What is the Online Signature Resizer?
When applying for competitive examinations, banking jobs, or government recruitment portals (such as SSC CGL/CHSL, UPSC CSE, IBPS PO/Clerk, JEE Main, NEET, and State PSCs), one of the most frequent reasons for application form rejection is an improperly formatted signature.
Smartphone cameras take high-resolution signature photos that range from 2 MB to 5 MB with grey or yellow background lighting. Portal submission guidelines strictly mandate signatures between 10 KB and 20 KB (or 4 KB to 30 KB) on a pure white background.
Our Signature Resizer Online tool is engineered to solve every signature upload problem:
- Precision File Size Compression: Fine-tune your output file size in real time to guarantee it falls strictly inside portal limits (e.g. 10–20 KB).
- Magic Paper Shadow Remover: Eliminates yellow tint and mobile camera shadows, converting dark paper to pure white.
- Ink Darkener / Contrast Booster: Sharpens blue and black pen strokes so cursive letters stay legible and crisp even at low file sizes.
- Correct Aspect Ratios: Automatically applies the mandatory 2:1, 3.5×1.5 cm, or 140×60 px aspect ratios without stretching or distorting your signature.
Official Signature Requirement Table by Exam
Compare the official signature dimensions and file size limits across major Indian recruitment portals:
| Exam / Organization | File Size Limit | Dimensions (px / cm) | Ink & Paper Rules |
|---|---|---|---|
| SSC CGL / CHSL / MTS / GD | 10 KB to 20 KB | 4.0 x 2.0 cm (140x60 px) | Black or Blue ink on white paper |
| UPSC Civil Services / OTR | 20 KB to 100 KB | Min 350x350 px (or 400x200) | Black ink only (mandatory) |
| JEE Main / NEET (NTA) | 4 KB to 30 KB | 3.5 x 1.5 cm | Running handwriting on white paper |
| IBPS PO / Clerk / SBI | 10 KB to 20 KB | 140 x 60 px | Black ink on unlined white sheet |
| BPSC / UPPSC / TSPSC | 10 KB to 50 KB | 250 x 150 px / 3.5 x 1.5 cm | English & Hindi running signature |
How to Resize Signature in 4 Simple Steps
Choose Your Exam / Preset
Select your exam from the dropdown menu (e.g. SSC, UPSC, NTA, IBPS) or keep default settings for custom sizes.
Upload Scanned or Phone Photo
Drag and drop your signature image or take a clear photo with your mobile camera.
Clean Paper & Darken Ink
Click "Magic Paper Cleaner" to remove grey shadows and use the Contrast slider to darken ink strokes.
Download Compliant .JPG
Fine-tune target KB with the precision slider and click "Download Compliant Image" for instant upload.
Common Mistakes That Lead to Signature Rejection
Ensure you avoid these critical mistakes when preparing your signature file:
- Signing in Capital / BLOCK Letters: Portals like SSC, UPSC, and NTA strictly reject signatures written in block letters. Always use natural running handwriting.
- Ruled / Lined Paper: Never sign on lined or notebook paper. Horizontal notebook lines interfere with OCR biometric scanners. Always use a blank, unruled white A4 sheet.
- Dark Background Shadows: Taking a signature photo under room lighting often creates heavy phone shadows. Use our Magic Paper Cleaner to whiten the background completely.
- Faint / Blurry Ink: Avoid using light ballpoint pens. Use a dark black or dark blue gel/ballpoint pen with firm pressure for maximum clarity.
Frequently Asked Questions (FAQs)
How do I resize a signature to 10 to 20 KB?
To resize your signature to 10 to 20 KB: 1) Upload your signature photo into our studio, 2) Select 'Signature' mode and choose 'SSC CGL' or 'IBPS', 3) Adjust the crop box around the signature, and 4) Use the fine-tune KB slider set to 15 KB. The tool will output an exact 10-20 KB .JPG file ready for download.
Why does my signature become blurry when compressed?
Blurriness happens when generic compressors downscale image resolution without ink-enhancement algorithms. Our tool uses smart bicubic canvas interpolation with contrast sharpening and paper whitening to ensure strokes stay dark and sharp even below 20 KB.
Is it safe to resize signatures on this website?
Yes, 100% safe. All image editing and compression calculations are processed locally inside your web browser using HTML5 Canvas API. Your signature is never uploaded to, saved on, or viewed by any remote server.
What format should my signature be saved in?
Government portals (UPSC, SSC, NTA, IBPS, PSCs) strictly require signatures in .JPG or .JPEG format. Our resizer automatically outputs high-quality, compliant .JPG files upon clicking download.
Rohit Kushwaha
Software Engineer & Creator of mysalarycalculator.in
I'm Rohit Kushwaha, a Software Engineer with 3+ years of experience in developing web applications and digital solutions. By combining technology with practical financial tools, I built mysalarycalculator.in to help Indian professionals easily understand their salary, taxes, EPF, gratuity, and take-home income.
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