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- Unlock High Quality PDF export by watching a short ad. Standard stays free. - Manage your ad and privacy choices anytime in About. - Large PDFs export more reliably on low-memory devices. - Smoother performance, and unlocked pen colors restore on a new phone.
Draw or auto-generate your digital signature. Save as PNG instantly.
TTDku is a clean and fast digital signature app designed for anyone who needs a professional signature directly on their phone—without unnecessary complexity. Whether you are signing documents, building a personal brand, or simply want a polished e-signature ready to use, TTDku makes the process simple and efficient. DRAW YOUR SIGNATURE Create a natural handwritten signature using your finger or stylus. You have full control over stroke width and ink color, allowing you to achieve a result that feels authentic and personal. AUTO SIGNATURE GENERATOR Prefer not to draw? Type your name and instantly generate a clean, elegant cursive signature. It is a quick way to get a professional look in seconds. SIGN PDF DOCUMENTS Import any PDF file, place your signature onto any page, adjust position & size with touch gestures, and export high-quality signed PDFs effortlessly. CUSTOMIZE YOUR STYLE - Free ink colors: black, dark gray, navy blue, red, green - Premium ink colors: gold, rose gold, silver, electric blue, violet, coral, orange, and more - Option to use a solid background or export with full transparency SAVE AND SHARE - Export signatures as high-quality PNG files - Use transparent backgrounds for document overlays - Share or open your signature instantly with a single tap SIGNATURE COLLECTION - Keep all your signatures organized in one place - Access and reuse any saved signature anytime WHY TTDKU? - Minimal and distraction-free interface - No account or login required - Fully offline functionality - Lightweight and responsive performance - Supports both finger and stylus input PERFECT FOR - Signing PDFs and documents - Email signature images - Social media and personal branding - Personal watermarks - Business cards and letterheads - Freelancers, students, and professionals Download TTDku now and create a clean, professional digital signature in seconds.