100% Free & Secure

Professional PDF Signer Free & Secure

200M+ Users
AWS Partner
G2 Excellence

Digital Signatures - Encryption technology prevents tampering and ensures document authenticity

Multiple Signatures - Allow multiple users to sign sequentially or simultaneously

30+ Years of Security - Trusted by 200 million users worldwide

✅ Windows, Mac, Linux ✅ Android & iOS ✅ Legally Binding
Professional PDF Signing Features

Sign PDFs, Securely & Legally

Experience seamless and secure PDF signing with digital signatures, multiple user support, and industry-standard encryption to ensure document authenticity and legal compliance.

WPS Office PDF Signer - Free digital signature tool
100% Secure

Digital Signatures with Encryption

Digital signatures use advanced encryption technology to prevent tampering and ensure authenticity. Perfect for contracts, agreements, legal documents, and any professional paperwork requiring secure authentication.

  • Encryption Technology: Advanced security prevents content tampering and ensures document integrity.
  • Certificate Protection: Password-protected certificates add an extra layer of security.
  • Legal Compliance: Electronic signatures are legally binding in many jurisdictions worldwide.

Multiple Signatures Support

Allow multiple users to sign the same document sequentially or simultaneously. Perfect for contracts, agreements, and collaborative documents requiring approval from multiple parties.

Sequential Signing

Users sign one after another in order

Simultaneous Signing

Multiple parties can sign at the same time

Signature Management

View and manage all signatures in one place

Multiple signatures support in WPS Office PDF signer
Multi-User

Security & Reliability

With over 30 years of experience, WPS Office provides robust security with strict privacy policies. Files are automatically deleted from servers within one hour.

30+ Years Auto-Delete

Cloud-Based Services

Access and sign PDFs from any device. Cloud services ensure convenience and flexibility across Windows, macOS, Linux, Android, and iOS platforms.

All Devices Cloud Sync

Professional Documents

Perfect for contracts, agreements, legal documents, and business paperwork. Ensure compliance and authenticity for any professional signing scenario.

Contracts Legal Business
How to Sign PDF Documents?

3 Simple Steps to Digital Signing

1

Open a PDF

Open your PDF document in WPS Office. The secure environment ensures your documents remain protected throughout the signing process.

2

Add a Signature

Click "Certificate signature" > "Add Certificate" > Fill in your certification information > Set Certificate protection password.

3

Position the Signature

Double click the PDF document to place the signature. You can also manage and view the signature to ensure proper placement and security.

How to sign PDF - Step 1: Open a PDF in WPS Office
Complete PDF & Office Suite

Explore More Features

WPS Office offers a comprehensive suite of PDF tools and office applications alongside the AI Photo Enhancer. From PDF editing to document creation, get everything you need in one powerful platform.

Learn More & Get Help

FAQs & Hot Topics

Find answers to common questions about PDF signing and explore trending guides.

Frequently Asked Questions

Join 200M+ Users Worldwide

Sign PDFs Securely. Start Signing Smart.

Experience the world's most trusted PDF signer with digital signatures, multiple user support, and 30+ years of security expertise - completely free.

100% Secure

Encryption & auto-delete

Legally Binding

Digital certificates

Multi-User

Multiple signatures

100% Free Forever
No Credit Card Required
Install in 30 Seconds

Available on all platforms:

Windows
macOS
Mobile
Linux

Start Signing PDFs Securely

Digital signatures with encryption technology - completely free and legally binding.