Sign PDF Online - Add Signature to PDF & Gmail

Sign PDF files quickly in your browser — no registration required.

Sign PDF online and add your signature to any PDF directly in your browser — including PDF attachments in Gmail. No registration required. SignPDF is a lightweight Chrome extension that lets you sign PDF documents and add your signature to any PDF — without registration, complicated software, or uploading files to third-party platforms. Everything works locally in your browser, so your documents stay private. ✍️ Add your signature to a PDF in seconds: • Draw your signature with your mouse • Upload a PNG or photo of your signature • Create a stylish text signature • Automatically remove image backgrounds • Add realistic scan effects • Resize and place your signature anywhere in the document ⭐ Why choose SignPDF? ✓ Sign PDF files instantly — no waiting, no sign-up ✓ Works directly with Gmail PDF attachments ✓ No registration and no account required ✓ Local signature storage — your data stays in your browser ✓ Save multiple reusable signatures ✓ Automatic signature placement suggestions ✓ Multi-page PDF support ✓ Simple drag-and-drop signature positioning ✓ Fast PDF export and download 📄 Perfect for signing: • Contracts and agreements • Invoices and business paperwork • HR and onboarding documents • Everyday PDF signing Unlike complex PDF editors or heavy enterprise e-signature platforms, SignPDF focuses on speed, simplicity, and privacy. No bloat, no learning curve — just open your PDF and sign it. 🚀 How to sign a PDF: 1. Open your PDF or a Gmail attachment 2. Draw, type, or upload your signature 3. Place it anywhere on the document 4. Download your signed PDF instantly Install SignPDF and add your signature to any PDF in seconds — right in your browser.