How to Sign a PDF

1. Scroll up to the tool above: Locate the PDF Signer tool at the top of the page.
2. Drag and drop your PDF: Use the drag-and-drop feature to upload your document directly into the tool.
3. Select your signature type: Choose between drawing a signature, typing text, or uploading an existing image.
4. Position your signature: Place your signature on the page where needed, adjusting its position and size as necessary.
5. Download the signed PDF: Once satisfied, click the Download button to save the signed document to your device.

Common use cases

Kim, a freelance consultant, uses the PDF Signer to sign client engagement letters on her laptop and emails the signed PDFs back the same day without printing. This process ensures her documents are secure and her clients’ data is not exposed to third-party services, maintaining confidentiality and trust.

Ravi, a small-business owner, e-signs vendor purchase orders from his phone while traveling, avoiding the print-sign-scan loop entirely. The browser-based nature of the tool means he can sign documents securely without worrying about data breaches or unauthorized access.

Hannah, a remote employee, signs HR forms such as offer letters, NDAs, and direct-deposit forms and returns them to her employer without exposing the documents to a third-party signing service. This ensures her personal and professional documents remain private and secure.

Devon, a property manager, signs lease addendums for tenants directly from his tablet during in-person meetings. By using the PDF Signer, he ensures that all documents are signed securely and directly on the device, without the need to upload files to any server.

How it works (privacy & technical)

The PDF Signer tool uses pdf-lib 1.17.1 and PDF.js 3.11.174, running entirely in your browser. PDFs are loaded as Uint8Array byte streams in browser memory, and operations such as PDFDocument.copyPages and getPage are executed in the JavaScript engine. Since the browser network layer is never invoked for file content, your documents remain private and secure. In contrast to server-based tools that require uploading files, our tool ensures that files do not appear in any server log because they never leave your device.

Frequently Asked Questions

Are my files uploaded to your servers?

No, your files are never uploaded to our servers. All operations are performed locally in your browser using pdf-lib 1.17.1 and PDF.js 3.11.174, ensuring your documents remain private and secure.

Is there a file-size or page-count limit?

There is no file-size or page-count limit for signing PDFs. However, large files may require more memory, and the tool is optimized to work within typical browser memory limits, ensuring smooth performance.

Does this work on mobile?

Yes, the PDF Signer tool works on mobile devices. It is fully responsive and can be used on tablets and smartphones, allowing you to sign documents on the go.

Are signatures created here legally binding?

Signatures created using this tool are legally binding in most jurisdictions, provided they are applied in compliance with local e-signature laws. Always verify legal requirements for your specific region.

Can I save my signature for reuse on future documents?

Currently, the tool does not support saving signatures for reuse. Each time you sign a document, you will need to recreate your signature or upload a new image.

Can I draw, type, or upload an existing signature image?

Yes, you can draw your signature, type text, or upload an existing signature image. These options provide flexibility in how you sign your documents, ensuring you can choose the method that best suits your needs.

Related Tools

PDF Editor — broader edits beyond signing; PDF Password Protector — lock the signed document; PDF Watermarker — stamp documents instead.