Digital signatures need to be tiny (under 10-20KB) for documents, PDFs, and form uploads. This tool compresses your signature scan to meet those strict limits while keeping it legible.
PDF signing tools, government forms, and corporate document systems require signature images under 10-20KB. Scanned signatures are often 100KB+ and need compression.
Try It Now — Free, No Sign-up
Settings pre-configured: Quality 45%, Max 600px. Upload your image and process instantly.
Compress Image Now100% browser-based • No upload to server • No sign-up required
How to Compress Signature Image — Document Ready
- Upload your scanned signature image
- Set quality to 40-50%
- Set max width to 600px
- Set format to JPEG
- Compress and verify size is under 10-20KB
Pro Tips
- Quality 40% + max width 600px gives 3-8KB for most signatures
- Crop whitespace around signature before compressing
- Black ink on white paper compresses most efficiently
- For transparent background signatures, use PNG (will be larger)
Frequently Asked Questions
How small can a signature image be?
A clean signature scan at quality 40%, max width 600px is typically 3-8KB in JPEG. This is legible for documents and forms.
Should signature be JPEG or PNG?
JPEG for smallest size (forms/documents). PNG if you need transparent background (overlaying on documents). WebP for web use.
Related Tools & Guides
Ready to Compress Your Image?
Free, instant, and 100% private. No sign-up needed.
Open Image Compressor