Sign PDF Documents
Online for Free
Draw, type, or stamp legally recognized electronic signatures directly on your agreements and contracts. Enjoy 100% privacy with zero file uploads and instant PDF downloads.
Select or Drop PDF to Sign
Draw, type, or stamp your legally valid e-signature directly in your browser. 100% private with zero server uploads.
What is Sign PDF and Why Do You Need It?
Electronic signatures (e-signatures) have fundamentally modernized how individuals and organizations execute contracts, approve transactions, and authorize legal agreements. Instead of the archaic routine of printing out paper documents, manually signing with a pen, scanning the papers, and emailing bulky files, digital signing allows you to execute documents in seconds from any device.
However, most traditional electronic signature providers require expensive monthly subscriptions and mandate uploading your private legal contracts to remote cloud databases. PuroPDF revolutionizes document signing: your files never leave your computer or smartphone. Using advanced WebAssembly and client-side canvas technology, your signatures are drawn, converted, and embedded directly inside your browser memory.
Commercial Contracts & NDAs
Execute vendor agreements, non-disclosure agreements (NDAs), master service contracts, and client proposals promptly without exposing proprietary business terms to third-party servers.
Real Estate & Tenancy Leases
Sign residential rental agreements, commercial lease renewals, property condition disclosures, and inspection sign-offs with total confidence and zero paperwork delays.
HR Onboarding & Tax Documents
Complete employment offers, company policy acknowledgments, W-4 / W-9 tax forms, and direct deposit authorizations securely while safeguarding employee personal identification data.
Freelance Invoices & Deliverable Approvals
Countersign project milestone sign-offs, approve creative work scopes, and sign invoices for rapid disbursement without waiting for postal delivery or clunky enterprise software.
How to Sign a PDF in 3 Simple Steps
Legally valid, private, and requiring zero account registration.
Upload Document
Select or drag-and-drop your PDF into the secure editor. The document loads directly in your browser's private memory.
Create & Position
Draw with your mouse or stylus, type with cursive calligraphy, or upload an image. Drag and scale your signature onto any page.
Finish & Sign
Click Finish & Sign to embed your flattened signature layers into the PDF and download your executed document immediately.
Why Sign PDF with PuroPDF?
- Absolute Privacy: Your legal contracts and private agreements remain strictly on your device; never uploaded to remote servers.
- ESIGN & eIDAS Compliant Format: Generates standardized flattened PDF signatures recognized in legal and corporate jurisdictions worldwide.
- 3 Flexible Signing Modes: Draw with precision, type using handwritten typography, or upload a photo of your physical signature.
- Date Stamps & Checkmarks: Convenient one-click tools to add official execution dates, initials, and agreement checkboxes.
- Zero Watermarks & No Paywalls: Completely free, unlimited signing without promotional branding or subscription fees.
Frequently Asked Questions
Yes. Electronic signatures (e-signatures) created on PuroPDF comply with major global e-signature frameworks including the U.S. Electronic Signatures in Global and National Commerce (ESIGN) Act, the Uniform Electronic Transactions Act (UETA), and European eIDAS regulations for standard electronic signatures.
Never. PuroPDF processes all document viewing, signature drawing, and PDF embedding 100% locally on your computer or mobile device. Your confidential contracts, financial paperwork, and legal agreements never leave your browser.
You can create signatures in three different ways: 1) Draw naturally using your mouse, trackpad, or finger/stylus; 2) Type your name and pick from handcrafted cursive typography styles; 3) Upload an image of your handwritten signature with automatic white background removal.
Yes! In addition to your primary signature, you can place today's date stamp with one click, add checkmarks (✓) for agreement boxes, and place initials anywhere on any page of your document.
Yes. You can effortlessly navigate through all pages of your document using the page controls, and place multiple signatures or initials on different pages before finalizing.
No. PuroPDF is completely free, unlimited, and requires no account registration or subscription. We never place watermarks, advertisements, or promotional branding on your signed documents.
Yes. When you click 'Finish & Sign', PuroPDF permanently embeds and flattens your signatures and stamps into the PDF document stream, ensuring they render consistently across all PDF viewers and printouts.
Absolutely. PuroPDF is fully touch-optimized for iPhone, iPad, Android phones, and tablets, allowing you to draw smooth signatures with your finger or stylus pen.