Sign PDF Online Free
No Signup · No Watermark · Live Preview
Add your digital signature to any PDF online — draw it or upload an image, position with live preview, and download instantly. Free, secure, no software needed.
Upload PDF
Add Signature
Download PDF
No account • No watermark • Files auto-deleted • Completely free • Live preview signing
Sign PDF Online Free – Add Digital Signature with Live Preview
Need to electronically sign a PDF document? PDFLinx Sign PDF tool lets you add your handwritten or uploaded signature online with real-time live preview — no software needed.
Draw or Upload
Draw your signature with mouse or touchscreen, or upload a PNG/JPG image of your signature.
Live Preview
See exactly where your signature will appear. Drag & drop to position it perfectly on any page.
Instant Download
Get your signed PDF instantly. No watermarks, no registration, no hidden fees.
Sign PDF in 3 Easy Steps
Upload PDF
Upload the PDF document you want to sign — contracts, forms, agreements, any PDF.
Add Signature
Draw your signature with mouse or upload an image. Drag it to the correct position in live preview.
Download
Click Sign PDF and download your professionally signed document instantly.
PDFLinx makes signing PDFs quick and professional with live preview — perfect for contracts, agreements, forms, and legal documents.
Sign PDF Online with Live Preview – Free Electronic Signature Tool by PDFLinx
Adding a digital signature to PDF documents is now essential for modern remote work, freelancing, and business workflows. Whether you need to sign employment contracts, NDAs, rental agreements, or consent forms, PDFLinx Sign PDF tool lets you electronically sign any PDF document online — with real-time live preview so you can see exactly where your signature appears before finalizing.
What is an Electronic PDF Signature?
An electronic PDF signature is a digital representation of your handwritten signature added to a PDF document. It can be drawn using a mouse or touchscreen, or created from an uploaded image of your physical signature. Unlike cryptographic digital signatures, visual electronic signatures are widely used for everyday document signing like contracts, forms, permission slips, and business proposals.
Why Use Live Preview When Signing PDFs?
- See exactly where your electronic signature will appear on the page
- Drag and drop signature to the precise position with visual feedback
- Adjust signature size in real-time before finalizing
- No trial and error — get it right the first time
- Professional-looking signed PDFs every time
- Select specific pages in multi-page PDFs for precise placement
How to Electronically Sign a PDF Online
- Upload your PDF document using the Sign PDF tool above
- Draw your signature with mouse/touchscreen or upload a PNG/JPG signature image
- See the live PDF preview with your signature overlay
- Drag the signature box to your preferred position on the page
- Select the correct page number for multi-page PDFs
- Adjust width and height using the sliders
- Click "Sign PDF" to apply the signature and download
Features of PDFLinx Sign PDF Tool
- Free online PDF signing — no subscription needed
- Real-time live preview of signature placement
- Draw signature with mouse, trackpad, or touchscreen
- Upload signature image (PNG, JPG, JPEG)
- Drag and drop signature positioning
- Adjustable signature width and height
- Multi-page PDF support with page selector
- Works on desktop, tablet, and mobile
- No watermark on signed PDF output
- Files automatically deleted after processing
- No software installation or account required
- Supports all standard PDF documents
Common Use Cases for PDF Signing
- Employment contracts and job offer letters
- Rental agreements and property lease documents
- Non-disclosure agreements (NDAs) and confidentiality forms
- Business proposals, quotes, and invoices
- Consent forms and permission slips
- Tax forms and financial documents
- Freelance client contracts and service agreements
- Academic and university application forms
Is PDFLinx Sign PDF Secure?
Yes. PDFLinx is built with privacy and security as the top priority. Your uploaded PDF files and signature images are processed automatically on secure servers and deleted immediately after the signed PDF is generated. We never store your documents, signatures, or personal data permanently. No account is required, meaning your files are never linked to any profile.
Sign PDF on Any Device — Desktop, Tablet, or Mobile
PDFLinx Sign PDF works seamlessly on Windows, macOS, Linux, Android, and iOS. Whether you're on a desktop computer, laptop, tablet, or smartphone, you can sign PDF documents online with full live preview and drag-and-drop positioning — all you need is an internet connection and a modern web browser.
Frequently Asked Questions
Is the Sign PDF tool free?
Yes. PDFLinx Sign PDF is completely free — no sign-up, no watermarks, no hidden costs. You can sign unlimited PDFs at no charge.
Can I draw my signature online?
Yes. You can draw your signature using your mouse, trackpad, or touchscreen directly in the browser. The drawing canvas supports smooth, natural signature drawing on both desktop and mobile.
Can I upload a signature image?
Yes. Upload any PNG or JPG image of your handwritten signature. The tool will overlay it on your PDF exactly where you position it in the live preview.
Can I see where my signature will appear before downloading?
Yes. The live preview panel shows your PDF with the signature overlay in real-time. Simply drag the signature box to position it exactly where you want.
Are my files safe when signing a PDF?
Yes. All uploaded files are processed automatically and deleted immediately after signing. We never store your PDFs or signatures permanently.
Can I sign specific pages of a multi-page PDF?
Yes. Use the page selector to choose exactly which page you want to sign. The live preview will show all pages, and you can click any page to select it.
Does the signed PDF have watermarks?
No. PDFLinx never adds watermarks to your signed PDF documents. The output file is clean with only your signature applied.
Can I use this on my phone or tablet?
Yes. PDFLinx Sign PDF works on all devices including smartphones and tablets. Touch support lets you draw your signature with your finger directly on mobile.
