Sign PDF Online Free — Electronic Signature Tool
Add legally binding electronic and digital signatures to your PDF documents instantly. Secure cloud processing with ESIGN & eIDAS compliance. No watermarks, no software needed.
Draw, Type or Upload
Create a professional digital signature in seconds. Choice of draw, type, or upload.
Place Anywhere
Accurately drag, drop, and resize your digital signature securely onto any page.
Sign Contracts
Formally sign NDAs, contracts, and taxes without printing a single page.
The Professional Way to Sign PDFs Online
Plainscan provides a high-performance electronic signature tool that allows you to sign documents with total confidence. Whether you're finalizing a freelance contract, signing a lease, or approving an invoice, our tool offers a friction-free experience without the need for expensive software like Adobe Acrobat or DocuSign. Your signatures are processed securely in the cloud and protected by AES-256 encryption.
Advanced E-Signature Features
Everything you need to handle legally sensitive documents with ease.
Handwritten Realism
Draw your signature directly with your mouse or touchscreen for a natural, handwritten look that maintains the authenticity of your personal mark.
Legal Compliance
Built to comply with ESIGN (USA) and eIDAS (EU) standards, ensuring your signatures are legally recognized in over 160 countries.
Digital Certification
Go beyond simple e-signatures with cryptographic digital signing that embeds tamper-proof metadata directly into the PDF structure.
How to Sign a PDF Online (3 Steps)
Follow these simple steps to add your signature to any document.
Sign In & Upload
Log in to your Plainscan account and upload your PDF. Your document is processed in a secure environment with 24-hour auto-deletion for your protection.
Create Your Signature
Select the 'Signature' tool to draw your mark, type your name using our script fonts, or upload an image of your physical signature.
Position & Download
Drag your signature to the correct line, resize it as needed, and click 'Finish & Download' to save your legally signed document.
Is an Electronic Signature Legally Binding?
Yes. Electronic signatures created with Plainscan are legally valid under the **ESIGN Act** in the United States, the **eIDAS Regulation** in the European Union, and equivalent laws globally. An electronic signature is legally equivalent to a handwritten signature for most commercial and personal agreements.
For high-security requirements, Plainscan offers **Cryptographic Digital Signatures**. Unlike simple electronic signatures, digital signatures use PKI (Public Key Infrastructure) technology to verify the signer's identity and ensure the document has not been altered after signing.
*Note: Certain document types (wills, court orders) may require specific notarization. Always verify with your local jurisdiction.*
Plainscan vs. Leading E-Sign Tools
Why professionals are switching to Plainscan for their document workflows.
| Benefit | Plainscan | DocuSign | Adobe Sign |
|---|---|---|---|
| Free Tier Availability | YES | Limited Trial | Paid Only |
| Digital Signatures | YES | YES (Premium) | YES |
| 24hr File Deletion | YES | NO (Stored) | NO (Stored) |
| AES-256 Encryption | YES | YES | YES |
Who Uses Plainscan PDF Sign?
Contracts & NDAs
Freelancers and agencies use Plainscan to finalize service agreements and non-disclosure agreements without the friction of printing and scanning.
HR & Onboarding
Managers and employees use our tool to sign offer letters, policy acknowledgments, and employee handbooks instantly.
Real Estate & Finance
Sign lease agreements, rental applications, and financial disclosures securely on any device.
Education & Forms
Quickly sign permission slips, enrollment forms, and academic consent documents for students and parents.
Frequently Asked Questions
Essential information about electronic and digital signatures.
1Is an electronic signature legally binding?
Yes. Plainscan's signatures are legally valid under the ESIGN Act and eIDAS regulation for most commercial and personal documents.
2What is the difference between an electronic and digital signature?
An electronic signature is a simple digital mark. A digital signature is a cryptographic version that uses PKI technology to verify identity and ensure the document hasn't been altered.
3How do I sign a PDF without Adobe Acrobat?
Simply upload your PDF to this page, use the 'Signature' tool to draw or type your name, and download the finished file. No Adobe installation required.
4Can I sign a PDF on my phone for free?
Yes! Plainscan is fully optimized for mobile. You can use your finger to draw your signature directly on your iPhone, Android, or tablet browser.
5How many times can I sign a PDF for free?
Plainscan offers 100 free signature tasks per day for all registered users. For higher limits, you can upgrade to a Pro or Team plan.
6Is signing a PDF on Plainscan safe and private?
Absolutely. We use industry-standard AES-256 encryption. Your documents are stored in your private cloud account and automatically deleted after 24 hours.
7What file formats can I sign besides PDF?
You can also sign Word (.docx) and PowerPoint (.pptx) files. Plainscan will automatically convert them to PDF during the signing process.
8Do I need an account to sign a PDF?
You can apply basic electronic signatures as a guest, but a free account is required for secure digital signing and to save your signature for future use.