Is Sign PDF completely free?

Yes, Sign PDF is 100% free with unlimited signatures, no registration required, and no file size limits.

Can I sign multiple pages in one PDF?

Yes, you can add signatures to any page in your PDF document. Use the page navigation at the bottom to move between pages and add multiple signatures as needed.

Is my PDF file safe and private?

Yes, all files are processed entirely in your browser. Your PDF never uploads to our servers, meaning complete privacy and zero data storage.

What file formats does Sign PDF support?

Sign PDF works with standard PDF files only. Your signed document downloads as a PDF, compatible with all devices and software.

Does Sign PDF work on mobile devices?

Yes, Sign PDF works on iPhone, iPad, Android phones and tablets. Simply upload your PDF and draw or import your signature using your touch screen.

Can I use an image of my signature?

Yes, click 'Upload Image' to add a pre-made signature PNG, JPG, or GIF file. You can also draw your signature directly in the tool.

How many times can I sign documents?

Unlimited times. There are no restrictions on how many PDFs you can sign or how many signatures you can add per document.

Do I need software installed to use this?

No software installation needed. Sign PDF works directly in your web browser on Windows, Mac, Linux, iOS, and Android.

Sign PDF

Add your signature to PDF documents online for free.

PDF Document

Click or drag a PDF file here

PDF files only

Signature Image

Click to upload signature image

PNG with transparent background recommended

How to use Sign PDF

Upload Your PDF Document

Click the 'Choose File' button in the center of the page or drag and drop your PDF directly into the upload area. Your file will be processed immediately in your browser without leaving your device.

Draw or Import Your Signature

Select 'Draw Signature' to create one using your mouse or touchpad, or click 'Upload Image' to add a pre-made signature file. Position your signature on the PDF by clicking and dragging it to the desired location.

Adjust Size and Position

Resize your signature using the corner handles and drag it to align perfectly with signature lines. Click anywhere else on the document to deselect and preview your signed PDF.

Download Your Signed PDF

Click the green 'Download' button at the bottom right to save your signed PDF to your device. Your file is ready to use, print, or email immediately.

How to Sign PDF Online Free — Complete Guide 2026

Signing PDF documents has never been easier. Whether you need to sign contracts, agreements, forms, or official documents, Sign PDF lets you add your signature online for free in just minutes—no registration, no downloads, no hassle.

Why Sign PDF Online?

Traditional document signing requires printing, signing by hand, scanning, and emailing. Sign PDF eliminates these steps entirely. You can sign any PDF instantly from your computer, phone, or tablet. The process is free, completely secure, and takes less than two minutes.

Step-by-Step Guide to Signing Your PDF

Step 1: Upload Your PDF Start by clicking the 'Choose File' button on the Sign PDF homepage. Select your PDF from your computer, or simply drag and drop it into the upload area. The file processes immediately in your browser without uploading to any server.

Step 2: Create or Import Your Signature You have two options: Draw your signature using your mouse, trackpad, or touch screen, or upload an image of your pre-made signature. If drawing, use smooth, natural strokes to match your real signature. If uploading, PNG, JPG, and GIF files work best.

Step 3: Position Your Signature Click and drag your signature to place it exactly where you need it on the PDF. You can resize it using the corner handles to ensure it fits perfectly on signature lines. Preview your work before downloading.

Step 4: Download Your Signed PDF Click the green 'Download' button to save your signed PDF to your device. The file is ready to email, print, or share immediately.

Key Features You'll Love

Completely Free — No hidden fees, no premium plans, no registration walls. Sign as many documents as you want.

100% Secure — All processing happens locally in your browser. Your PDF files never leave your device, ensuring complete privacy.

Works Everywhere — Compatible with Windows, Mac, Linux, iPhone, iPad, Android, and any device with a web browser.

Unlimited Signatures — Add multiple signatures to the same document, sign as many PDFs as needed, and handle files of any size.

Tips for Best Results

Draw naturally — Replicate your real signature as closely as possible for authenticity
Use consistent pressure — If drawing on a touchscreen, maintain steady hand pressure
Position carefully — Align signatures with designated signature lines for professional appearance
Save originals — Keep backup copies of important documents before signing

Is Signing Online Legally Valid?

Yes. Digital signatures created with Sign PDF are legally binding in most countries, including the United States (under the ESIGN Act) and the EU (under eIDAS Regulation). However, some documents like wills or property deeds may require additional authentication. Always verify requirements for your specific document type.

Common Use Cases

People use Sign PDF to:

Sign employment contracts and offer letters
Approve forms and applications
Authorize agreements and consent documents
Sign NDA documents
Approve purchase orders and invoices
Sign digital consent forms
Finalize lease agreements

Start Signing Today

Stop wasting time printing, signing, and scanning documents. Sign PDF gives you the fastest, easiest way to add your signature to any PDF online—completely free and completely private. Upload your first document right now and see how simple digital signing can be.

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