100% Private (Local Processing)
Signature Resizer Online
Crop scanned signatures, auto-trim white/transparent margins, and resize to standard dimensional metrics.
Loading tool interface...
How to use Signature Resizer
- 1
Select and upload the signature image (JPG or PNG).
- 2
Configure target dimension bounds in pixels (default 300x100 px).
- 3
Toggle 'Auto-trim transparent/white margins' to crop border whitespace.
- 4
Click 'Trim & Resize Signature' to process and download transparent PNG.
Capabilities
- Auto-trims whitespace margins via alpha-channel bounding sweeps
- Resizes signatures to specific width and height dimensions
- Locks aspect ratio to prevent skewing signature curves
- Exports transparent PNGs ideal for digital document signing
Privacy & Processing
This tool operates in a sandbox directly inside your web browser. All parsing, processing, and downloads are rendered locally. Your file size, metadata, and contents never cross the network. It works completely offline.
Frequently Asked Questions
Can I upload a signature written on white paper?
Yes. The auto-trim algorithm detects both transparent pixels and off-white paper backgrounds, cropping down to the pen stroke boundaries.