Sign PDF Documents Online Free

Apply secure electronic signatures to your contracts, agreements, and official forms online. PDFMount's e-sign tool provides a secure workspace where you can draw your signature with a mouse or touchscreen, type your name using elegant cursive fonts, or upload an image stamp of your handwritten sign. The system embeds your signature as a clean vector object directly onto the target pages of your PDF document. The tool runs on secure, isolated servers, protecting your legal agreements and personal data from unauthorized access. You can sign documents in seconds, avoiding the slow process of printing and scanning.

How to use

  1. Upload the PDF contract or agreement you need to sign from your computer or mobile storage using the secure upload zone.
  2. Select your signing method, choosing to draw with a mouse or touchscreen, type your name, or upload an image stamp.
  3. Drag and position your signature stamp onto the target pages of the document, adjusting the scale to fit signature boxes.
  4. Click the compilation button to trigger our signing engine, which embeds the signature data directly into the PDF layout streams.
  5. Save the signed PDF document to your device, featuring a clean layout and zero added watermarks or brand logos.

Frequently Asked Questions

Are the signatures legally binding?

Yes, the electronic signatures generated on our platform are standard electronic signatures. They comply with electronic transaction laws such as the eIDAS regulation in Europe and the ESIGN Act in the United States, making them suitable for business agreements, school forms, and vendor contracts. They carry legal validity for most general agreements.

Can I add multiple signatures or text blocks to the same PDF?

Yes, you can add multiple signatures, initials, dates, and custom text inputs to any page of your document. This is useful for filling out forms, adding witness signatures, or signing complex agreements that require verification on multiple sections. You can place stamps on as many pages as needed.

What is the maximum file size limit for signing documents online?

Guest users can upload documents up to 25MB for signing. Registered free accounts can process files up to 50MB, and Pro tier subscribers can upload documents up to 500MB. Our tool processes files of all sizes in under ten seconds. There are no page count restrictions on these uploads.

Will the layout or formatting of my contract be changed after signing?

No, our signing tool preserves the original layout of your document. The system adds the signature as a separate vector overlay stream rather than rasterizing or compressing the document pages. This means your text remains searchable and all links stay active. The visual quality of your graphics is preserved.

How does PDFMount ensure the confidentiality of my signed contracts?

We take contract security seriously. All documents are encrypted during transfer using TLS 1.3 and processed in isolated virtual sandboxes. Our automated deletion script removes all uploaded files, signatures, and signed outputs from our servers after exactly 60 minutes. No copy is kept on our systems.

Our electronic signature tool integrates signatures directly into the PDF page dictionary structure. Instead of flattening pages into images, the engine writes the signature as a vector graphic overlay object, preserving the layout fidelity of the underlying text. Any images uploaded as signatures are scaled proportionally to maintain resolution without blurring. The tool preserves existing interactive form fields and document structure metadata, ensuring that the PDF remains fully compliant with standard ISO PDF specifications for viewing on any PDF reader.

Security is a core priority for all electronic agreements processed on our platform. All data exchanges are protected by TLS 1.3 encryption protocols, preventing interception. The e-sign editor runs within isolated server container sandboxes, separating your session from other users. We maintain a strict zero retention policy: we do not read, store, or share your contracts. All uploaded files, created signatures, and signed documents are permanently purged from our volatile memory systems exactly 60 minutes after execution, leaving no backup copies.

This online signing utility supports many professional workflows. Business managers can sign vendor contracts, purchase orders, and employee agreements without printing. Legal teams can sign documents and client letters, ensuring they are saved securely in PDF format. Students and parents can sign permission slips and enrollment forms quickly from mobile devices. By providing a secure, browser-native signing workspace, PDFMount improves document processing times and helps businesses transition to paperless operations.

Why use PDFMount?
  • 100% Free — no watermarks, no hidden fees
  • Secure — files auto-deleted after 60 minutes
  • No sign-up required — start immediately