Add Signature to PDF Online Free
Need to add a signature to PDF online for free? Nyxbo lets you sign PDF documents in seconds. Upload your PDF, draw your signature, type your name, or upload an image signature. No registration, watermark, or software installation required.
Drop your PDF here or click to browse
How to Add Signature to PDF
Adding a signature to a PDF is simple with Nyxbo. Follow these steps:
- Upload your PDF – Drag and drop the file or click to browse.
- Create your signature – Draw it directly on the canvas, or upload an image of your handwritten signature (PNG/JPG).
- Position the signature – Choose a preset position (bottom-right, top-left, etc.) or enter custom X/Y coordinates. You can also scale the signature.
- Download the signed PDF – Click the "Sign PDF & Download" button. The signed document is saved locally; nothing is uploaded to any server.
Draw, Type or Upload an Image Signature
Our tool gives you flexibility in how you create your signature:
- Draw your signature – Use your mouse, touchpad, or touchscreen to hand‑write your signature on the digital pad.
- Upload an image – If you already have a scanned signature or a transparent PNG, you can upload it directly.
- Type your name – While the current tool focuses on drawing and image upload, many users combine typed text with a stylized font to create an electronic signature.
All processing happens right in your browser. Your PDF and signature image never leave your device.
Digital Signature vs Electronic Signature
It's important to know the difference:
- Electronic Signature – A broad term for any electronic mark (typed name, drawn scribble, image) used to sign a document. The tool on this page creates an electronic signature.
- Digital Signature – A cryptographic signature based on a digital certificate issued by a Certificate Authority. It ensures the integrity and origin of the document. Our tool does not generate digital signatures; for legally binding digital signatures, you may need specialized software.
For most everyday use (contracts, forms, approvals), an electronic signature is perfectly sufficient and widely accepted.
Frequently Asked Questions
How do I add a signature to a PDF?
Upload your PDF, create a signature by drawing, typing or uploading an image, place it on the document, and download the signed PDF.
Can I add signature to PDF free?
Yes. Nyxbo allows you to sign PDF documents online for free without registration or payment.
How do I add a signature in PDF on mobile?
Open the tool in your mobile browser, upload a PDF, create your signature (touch drawing works great), and save the signed document.
Is my PDF uploaded to any server?
No. The entire process runs locally in your browser. Your documents and signatures never leave your device.
What file types are accepted for the signature image?
PNG, JPG, and JPEG are accepted. For best results, use a transparent PNG with a clean signature.
Can I place the signature on a specific page?
Yes, you can select the page number where the signature should appear.
Can I resize the signature?
Yes, use the Size Scale slider (0.1 to 2) to make the signature smaller or larger.
Does this tool work offline?
Once the page is loaded, you can continue using it without an internet connection, as long as the necessary scripts are cached.
Is the signature legally binding?
Electronic signatures are widely accepted for many types of agreements. For highly sensitive documents, a digital certificate may be required.
Do I need to install any software?
No. Everything runs in your web browser. No plugins or downloads are needed.
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