Sign PDF Documents Securely
Draw your electronic signature and stamp it onto your contracts, agreements, and forms. Everything happens securely in your browser—your private documents never leave your device.
Sign PDF Locally
Draw or upload your signature and stamp it securely in your browser. No uploads.
Select Pages to Sign
Click on the pages where you want your signature to appear.
How to Add an Electronic Signature to a PDF
In today's digital workflow, printing a contract, signing it with a pen, and scanning it back into the computer is an outdated and frustrating process. Electronic signatures have become the global standard for business, real estate, and freelance agreements.
However, most free online signing tools require you to upload your highly confidential contracts—and your personal handwritten signature—to unknown remote servers. We completely eliminated this security risk. Our tool utilizes advanced HTML5 WebAssembly to capture your drawn signature and stamp it onto your document entirely within the secure sandbox of your local web browser.
Why Use Our Local PDF Signer?
Combining ease-of-use with enterprise-grade privacy makes this the ultimate tool for handling sensitive agreements:
- Absolute Confidentiality: Your contracts, NDAs, and tax forms are never transmitted over the internet. You are processing them locally, ensuring compliance with strict privacy laws like GDPR.
- Touch-Friendly Drawing: Our responsive signature pad works flawlessly with computer mice, laptop trackpads, mobile touchscreens, and digital styluses, allowing you to create a natural, fluid signature.
- Batch Signing: Need to initial or sign a 50-page contract? Draw your signature once, click the 'Select All Pages' button, and our engine will stamp every single page simultaneously in a fraction of a second.
Step-by-Step Guide to Signing Your Document
- Load your document: Drag and drop your target PDF into the secure upload zone above. A drawing pad will instantly appear.
- Draw your signature: Use your mouse or finger to draw your signature inside the box. Click "Save Signature" when you are satisfied.
- Select target pages: You will see a visual grid of your document. Click on the specific pages where you want your signature to appear (a green checkmark will indicate your selection).
- Stamp and Download: Click "Sign & Download". Our local script will embed your signature in the bottom-right corner of the chosen pages and save the file to your device.
The Benefit of Local Document Processing
The standard approach for most web-based PDF editors is inherently flawed: you upload your file, wait in a server queue, and then download the result. This exposes your signature and identity to massive privacy violations.
Zero-Upload Privacy
When dealing with signed legal agreements, cloud uploads are dangerous. Our zero-upload policy guarantees that your document and drawn signature never leave your computer's RAM.
Instant Processing
Because you aren't waiting on internet upload or download speeds, securely stamping a massive document happens in a fraction of a second, completely lag-free.
Frequently Asked Questions
Is it completely free to sign a PDF online?
Yes, our PDF signing tool is 100% free to use. There are no limits on how many documents you can sign, no premium subscriptions, and we never add promotional watermarks to your contracts.
Are my signed documents safe and private?
Absolutely. We utilize a strict zero-upload architecture. Your sensitive legal agreements and drawn signatures are processed entirely within your computer's RAM, ensuring complete GDPR and HIPAA compliance.
How do I add my signature to a PDF document?
Upload your document, and our tool will prompt you to draw your signature using your mouse or touchscreen. Once saved, simply click on the pages where you want the signature to appear and hit 'Sign & Download'.
Where will the signature be placed on the page?
By default, our engine securely stamps your custom drawn signature in the bottom right corner of the pages you select, scaling it to a professional, readable size.
Is an electronic signature legally binding?
In most countries (including the US under the ESIGN Act and the EU under eIDAS), visual electronic signatures are legally binding for most business, employment, and personal contracts.
Can I use my finger or a stylus to draw the signature?
Yes! Our signature pad is fully touch-responsive. If you are using a smartphone, tablet, or a touch-screen laptop, you can draw a very natural signature using your finger or an active stylus.
Do you store or save my drawn signature?
No. Your drawn signature is temporarily converted into an image within your browser's local memory to stamp your document. Once you close the tab or reset the tool, your signature is permanently erased.
Can I sign multiple pages at once?
Yes. After drawing your signature, you can use the 'Select All Pages' button, or manually click specific pages in the visual grid. Your signature will be applied to all chosen pages simultaneously.
Do I need to install Adobe Acrobat to sign my document?
No software installation or paid licensing is required. Our entire PDF manipulation and signing engine runs safely, securely, and independently inside your modern web browser.
Will signing the PDF reduce the quality of my document?
No. Our local processing engine strictly overlays your signature onto the existing document structure. It preserves 100% of the original text, layout, and image quality of your PDF.
Do I need an active internet connection to apply the signature?
Once the webpage has completely loaded in your browser, the actual file processing and stamping engine runs offline. You do not need an active connection to sign and save the document.
Can I sign a password-protected PDF?
Our local processing engine cannot read heavily encrypted files. You will need to remove the password protection from your document before you can visualize it and stamp your signature.
What is the difference between this and a digital certificate?
This tool provides an 'Electronic Signature' (a visual representation of your handwritten signature). It does not provide cryptographic 'Digital Signatures' which require third-party identity verification authorities.
Can I clear and redraw my signature if I make a mistake?
Yes, you can click the 'Redraw Signature' button in the top toolbar at any time to open the drawing pad, clear your previous attempt, and draw a new one before processing the document.
Can someone remove my signature after I send the PDF?
To maximize security, we recommend using our 'Flatten PDF' tool immediately after signing your document. This bakes your signature permanently into the background layer, making it uneditable by the recipient.