PX & CM Units
Resize in pixels or centimeters with instant canvas preview as you type. Switch units at any time, values convert automatically.
Resize Signature Image
Need to resize your signature to a specific size for a form, portal, or document? Upload your image, set the target dimensions in PX or CM, lock the aspect ratio if needed, and download your resized signature instantly.
Guide
How to Resize Your Signature
1
Upload Your Signature
Drag and drop or choose your signature image file.
2
Set Dimensions & Options
Set the exact width, height, and DPI required for your document.
3
Resize and Download
Click Resize and download the signature at the perfect size.
Signature Scans That Match the Form
Most online forms reject signature uploads that exceed a specific pixel or KB limit. The signature resizer hits the exact target without making your handwriting look pixelated or stretched.
Used daily by job applicants, loan applications, government portals, and HR teams collecting bulk-sign-off forms.
Benefits
Why Use This Signature Resizer
Aspect Ratio Lock
Enable the ratio lock to keep your signature proportional, change one dimension and the other updates automatically.
Minimum KB Target
Set a minimum output file size in KB. If the resized image is smaller, the tool automatically pads it to meet the requirement.
100% Private
All processing happens entirely in your browser using the HTML5 Canvas API. Your signature image is never sent to any server.
Explore More
Similar Tools
More Image tools you might find useful.
FAQ
Frequently Asked Questions
Common questions about resizing signature images.
Is my signature image uploaded to a server?
No. The entire resize process runs in your browser using the HTML5 Canvas API. Your signature never leaves your device.
Can I resize in centimeters?
Yes. Switch the unit toggle to CM and enter your dimensions. The tool converts to pixels using the standard 96 PPI conversion (1 cm = 37.795 px) before drawing to the canvas.
Why would I need a minimum file size in KB?
Many government forms and portals require uploaded signatures to be at least a certain file size (e.g. 10 KB or 20 KB). The KB padding option appends harmless null bytes to the file so it meets the minimum without changing the image visually.
What image formats are supported?
JPG, PNG, and WebP are supported for upload. The output is saved as PNG by default, or WebP if the original was WebP.
Will my signature be distorted when resizing?
Not if you keep the aspect ratio lock enabled. With the lock on, changing one dimension automatically adjusts the other to preserve the original proportions.