PDF Signature Tool
Sign PDFs securely in your browser. Draw or type your signature.
Drag & drop files here
or click to browse from your device
Comprehensive Guide to In-Browser Electronic PDF Signing
The Sign PDF tool allows you to draw, type, or upload your electronic signature and place it securely on any PDF document directly inside your browser. Designed for freelancers, tenants, and business professionals, it eliminates the tedious print-sign-scan cycle while ensuring your sensitive documents never touch external servers.
Popular Real-World Use Cases
Employment Offer Letters & NDA Agreements
Sign new job offers, consulting agreements, and non-disclosure contracts smoothly without needing a printer or scanner.
Residential Leases & Rental Applications
Add your signature and date to lease agreements, property addendums, and landlord forms in seconds.
Freelance Invoices & Client Vendor Contracts
Sign and return official vendor contracts, scopes of work, and tax forms (W-9 / W-8BEN) quickly to accelerate payments.
How In-Browser Processing Works
The tool uses pdfjs-dist to render PDF pages onto an interactive canvas. When you draw your signature with a mouse, touchpad, or touchscreen stylus, smooth bezier curves capture high-precision vector strokes with transparent backgrounds. pdf-lib then embeds the signature PNG layer into the document's page dictionary at your exact coordinates and scale, generating a compliant, signed PDF.
Pro Tips for Best Results
- Sign using a touchscreen phone or tablet stylus for the most natural, fluid handwriting signature.
- You can resize and drag your signature to fit perfectly onto any contract signature line.
- Upload a saved transparent PNG of your signature if you prefer using a pre-existing authentic signature stamp.
How It Works
Upload PDF
Select the document you need to sign.
Processed on your device
Draw, type, or upload your signature and place it on the signature line.
Download Signed PDF
Export your securely signed, finalized PDF document immediately.
Frequently Asked Questions
Are electronic signatures created with this tool legally binding?
In most jurisdictions (including the US under the ESIGN Act and UETA, and the EU under eIDAS), electronic signatures on ordinary commercial contracts, NDAs, and leases are legally valid. For specialized notarized deeds or wills, verify local statutory requirements.
Can I sign on my smartphone or tablet touchscreen?
Yes! The drawing canvas is fully touch-optimized with smooth pointer smoothing, allowing you to sign naturally with your finger or an Apple Pencil / stylus.
Can I add both a signature and a date to the document?
Yes! You can place multiple elements (such as your drawn signature, typed name, and date) onto any page of the document before downloading.
Are my confidential contracts stored on your servers?
Never. Document loading, signature placement, and PDF assembly happen 100% locally within your browser runtime. Zero document data is transmitted or retained.
Is my file uploaded anywhere?
No — everything happens in your browser, your file never reaches a server.
Do I need to create an account?
No, no sign-up required.
Is this really free?
Yes, no hidden charges, no watermark on your output.