OnlineStampDoc lets you design custom digital stamps and apply them to PDF, JPG, and PNG documents — all inside your browser. No file uploads, no signup, no installation needed. ✅ 7 stamp shapes (circular, oval, diamond, star & more) ✅ Custom text, colors, fonts & logos ✅ Distressed/realistic ink effect ✅ Stamp any PDF or image instantly ✅ 100% private — files never leave your device Perfect for businesses, freelancers, and anyone who needs to approve, certify, or watermark documents online.