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🖋️ Stroke Extraction Threshold:
151
💎 Ink Density Enhancement:
2.1px
Signature & Stamp Transparent PNG
Turn Handwritten Signatures into Clean, Transparent PNGs
Extract handwritten ink signatures from paper photos into pure transparent PNGs, ready for signing digital documents. Preserves authentic stroke dynamics for signing PDF contracts and invoices.How to Extract Your Signature
Three simple steps to a professional digital asset
01
Upload Photo
Take a clear photo of your signature on plain paper and upload it to Dopic. Ensure good lighting for best results.
02
AI Processing
Our engine automatically detects the ink, removes the paper background, and eliminates shadows or creases instantly.
03
Download PNG
Preview the transparent result and download your high-quality PNG. Insert it directly into your contracts or documents.
Top Real-World Uses for Digital Signatures
Streamline your workflow with professional-grade signature assets
PDF Contract Signing
Insert crisp, shadow-free signatures directly into digital contracts without the messy scan look. Perfect for legal docs and NDAs.
Freelance Invoicing
Add a professional touch to invoices and proposals. Create reusable signature assets that match your brand's aesthetic perfectly.
E-commerce Agreements
Speed up vendor onboarding and supplier agreements by extracting signatures from mobile photos for instant digital processing.
Real Estate Documents
Handle lease addendums and closing documents faster. Ensure every signature is high-contrast and legible for compliance.
Personal Letters & Cards
Digitize your actual handwriting for personalized emails, thank-you notes, or creative projects while keeping your unique style.
Mobile App Onboarding
Capture user consent forms or terms acceptance quickly by converting phone-captured signatures into web-ready transparent images.
Why Professionals Choose Dopic
Enterprise-grade quality with consumer-friendly simplicity
100% Private & Secure
All processing happens locally in your browser. Your documents never leave your device, ensuring complete privacy for sensitive contracts.
Instant AI Extraction
Advanced algorithms detect ink edges precisely, removing paper noise, shadows, and creases in under 2 seconds.
High-DPI Transparency
Export as pure Alpha PNGs. No white boxes, no jagged edges. Resize freely without losing quality for any document format.
Zero Watermarks
Download your clean signature assets completely free of branding or watermarks, ready for immediate commercial use.
100% FREE
Transparent signature extracted from a handwritten photo on a wooden desk, showing clean ink lines against a checkerboard transparency background.
Frequently Asked Questions
Everything you need to know about digital signature extraction
Is my signature data safe and private?
Absolutely. Dopic processes all images directly in your browser using client-side technology. We do not upload, store, or share your signature images on our servers.
Can I use this signature in Adobe Acrobat or Word?
Yes. The extracted transparent PNG works seamlessly with all major document editors, including Microsoft Word, Google Docs, Adobe Acrobat, and Canva.
Does it work if the photo has shadows or wrinkles?
Yes. Our AI is specifically trained to ignore paper textures, shadows, and creases, isolating only the ink strokes for a clean result.
Will there be a white box around my signature?
No. You will receive a true transparent PNG file. When placed over any background (white, colored, or scanned), only the signature ink will be visible.
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