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Add Signature to PDF Online

Add an electronic signature to your PDF online. With LightPDF’s PDF signature tool, you can sign PDF documents, invite others to sign, and download completed files.

How to Sign a PDF Online

Use LightPDF to add a signature to PDF files online in just a few steps

1
Upload your PDF
Drag and drop your PDF into the upload area, or click “Choose File” to select a document from your device.
2
Add Signature or Invite Signers
Add your own electronic signature to the PDF, or invite others to sign the document. You can also set the signing order and choose where the signature should appear.
3
Manage and Download
Track pending documents online and download the completed signed PDF after signing.

What You Can Do with LightPDF PDF Signature Tool

LightPDF helps you complete the online PDF signing process, from adding signatures and sending signature requests to managing documents and downloading signed PDFs.

Sign PDFs Yourself
Add your own electronic signature to a PDF document directly online. You can place the signature where it needs to appear and complete simple signing tasks.
Sign PDFs Yourself
Send Documents for Signature
Send a request to another person who needs to sign it. This is useful when a document requires approval, confirmation, or signature from clients, partners, team members, or other recipients.
Send Documents for Signature
Manage Signing Order and Progress
Set the signing order for multiple signers and track whether each document is still pending or completed. This helps keep the eSign PDF process clear and organized.
Manage Signing Order and Progress
Store and Download Signed Documents
Keep documents waiting for signature in the cloud, then download the completed signed PDF after all required signatures are collected.
Store and Download Signed Documents

eSign PDFs for Everyday Needs

LightPDF makes it easy to sign PDF documents online for work, study, business, and personal use.

Contracts and Agreements

Quickly add your electronic signature to simple contracts, agreements, authorization forms, or confirmation documents without printing them out.

Contracts and Agreements

Application Forms

Fill out and sign application forms, school documents, registration files, or HR forms directly online.

Application Forms

Business Documents

Sign invoices, quotations, approval documents, and other business PDFs to speed up daily document workflows.

Business Documents

Personal Files

Add your signature to letters, consent forms, travel documents, and other personal PDFs whenever you need a quick signing solution.

Personal Files

Best Online PDF Signature Tools Compared

Compare LightPDF, Smallpdf, and iLovePDF to choose an easy online tool for signing PDFs online.

FeatureLightPDFSmallPDF 
Free PDF Signing
Supported
Available with limited access
Signing Documents Yourself
Supported
Supported
Signature Request
Supported
Supported
Add Signature Position
Place the signature where needed
Place signature, initials, text, date, or checkboxes
Certified Digital Signature
Not supported
Available on paid plan
Daily / Plan Limits
Limits depend on free or paid plan
Limited to 2 documents/month
Ease of Use
Very simple
Easy
Cross-Device Access
Browser-based access on desktop and mobile
Works online on Mac, Windows, Linux, iOS, and Android

More Smart PDF Tools from LightPDF

Get more document work done online with LightPDF.

Edit PDF

Edit PDF

Edit text, add images, annotate documents, and make changes to your PDF online.
Protect PDF

Protect PDF

Add password protection to your PDF to help control access to your document.
Compress PDF

Compress PDF

Reduce PDF file size for easier sharing, uploading, or storage.
AI Invoice Generator

AI Invoice Generator

Quickly create professional invoices for payments, client confirmation, and business records

Expand Allexpand-all

Do I need to print or scan the document?

No. You can sign your PDF directly online without printing, manually signing, or scanning the document again.

Is this a certified digital signature?

No. LightPDF’s online Sign PDF tool is designed for adding an electronic signature to a PDF. It is not a certified electronic signature service and does not provide certificate-based digital signatures, identity verification, audit trails, or legal signing certificates.

Can I draw my signature on a PDF?

Yes. You can draw your signature online and add it to your PDF document.

Can I upload an image signature?

Yes. You can upload an image of your signature and place it on the PDF.

Can I use LightPDF on mobile?

Yes. LightPDF works in the browser, so you can sign PDFs from desktop or mobile devices.

LightPDF: AI-Powered PDF Toolkit