Why Use Our Free Signature Resizer & Compressor?
When applying for government examinations, university admissions, or bank jobs, application portals strictly enforce digital signature guidelines. Your signature often needs to be a specific dimensional size (like 3.5 cm x 1.5 cm or 140 x 60 pixels) while remaining under a strict byte limit (like 10KB or 20KB). Our tool handles both the physical resize and the byte compression in a single click.
📏 CM to Pixels Auto-Conversion
If your form requires dimensions in Centimeters, just select "CM". We automatically apply the standard 96 DPI web conversion to guarantee portal acceptance.
⚖️ Strict KB Limit Compression
Need your signature exactly under 20KB? Input your limit, and our binary search algorithm optimizes the JPEG quality down to the perfect byte.
🔒 100% Total Privacy
Your signature is sensitive data. We process your image completely offline within your browser using HTML5 Canvas. We never store or upload your file.
How to Resize a Signature for Online Forms
- Upload your Signature: Take a clear photo of your signature on blank white paper and upload the JPG or PNG file.
- Choose your Unit: Does the form ask for cm or px? Select your preferred measurement unit from the dropdown menu.
- Set Width and Height: Input the exact physical dimensions required by your application portal (e.g., Width: 3.5, Height: 1.5).
- Set Target KB Size: Many portals reject files larger than 20KB. Type your maximum allowed size in the Target Size (Max KB) box.
- Download Instantly: Click download to save the perfectly formatted signature directly to your device.
Perfect for SSC, UPSC, and Bank Exams
We specifically built this tool to comply with the rigid formatting rules of major Indian and international application portals. Forms for IBPS, SSC CGL, UPSC, and Passport services typically demand signatures to be between 10KB and 20KB in size, with specific dimensions in cm. Our tool automatically forces a clean white background behind transparent PNGs to prevent formatting errors on these legacy portals.
Frequently Asked Questions (FAQ)
How do I resize my signature to 3.5cm x 1.5cm?
Upload your signature image, change the Measurement Unit dropdown to "Centimeters (cm)", and enter 3.5 in the Width box and 1.5 in the Height box. The tool automatically converts this to the correct web pixels.
How can I compress my signature under 20KB?
After setting your physical dimensions, simply type '20' into the 'Target Size (Max KB)' box. Our system uses a binary search algorithm to compress the JPEG quality until it sits perfectly under your limit without making it illegible.
Is it safe to upload my signature here?
Yes, it is 100% secure. All resizing and compression happens locally inside your device's browser. We never upload, save, or store your signature on our servers. As soon as you close the tab, the data is gone forever.