How to Sign a PDF on Windows (Free, No Software)

A contract, a consent form, or a return slip lands in your inbox as a PDF and needs a signature. The old way — print it, sign it with a pen, scan it back, and email the scan — still works, but nobody wants to do that anymore. On Windows you can sign a PDF electronically in a couple of minutes, and you do not need to install Adobe Acrobat or pay for a subscription to do it.

Here is how to sign a PDF on Windows for free, without installing anything.

Your options for signing on Windows

• A browser-based signing tool that works in Edge or Chrome — no installation, no account
• Microsoft Edge’s built-in Draw tool, which lets you sign freehand with a mouse or touch
• Adobe Acrobat Reader’s Fill & Sign feature, which is free but demands a 250 MB install and an Adobe ID
• Adding an image of your handwritten signature so it looks consistent every time

Sign a PDF on Windows in your browser

Open a browser-based signing tool and add your signature in under a minute. Because the processing happens on your own machine, a sensitive contract stays on your PC the whole time.

1. 1Open the Sign PDF tool in Microsoft Edge or Chrome on your Windows PC.
2. 2Drag your PDF from File Explorer into the upload area, or click to browse and select it.
3. 3Click the signature button and choose how to sign — draw with your mouse or trackpad, type your name in a handwriting font, or upload a saved image of your signature.
4. 4Drag the signature into place on the signature line or form field.
5. 5Download the signed PDF and send it back by email or through your portal.

Signing with Microsoft Edge (no tool at all)

If you only need a quick freehand signature, Microsoft Edge — which is already on every Windows 10 and 11 PC — can do the job. Right-click the PDF, choose Open with > Microsoft Edge, then click the Draw (pen) tool in the toolbar and sign with your mouse, trackpad, or touchscreen. It is convenient, but limited: you cannot type a neat signature, resize or reposition it, or reuse a saved one. For anything more polished, a browser-based signer with type/draw/upload options is a better match.

Is a Windows electronic signature legally binding?

In most countries, an electronic signature is just as binding as a handwritten one as long as it identifies you and shows you agreed to the content. What makes it binding is your intent to sign, not the exact shape of the mark. If the document explicitly requires a handwritten signature or needs third-party verification, confirm with the other party before returning an electronic one.

More signing tasks on Windows

Beyond adding a signature you might need to fill in form fields, add initial boxes, or lock a signed document against changes. There is a free browser tool for each of these, so you can handle a whole signing workflow on Windows without installing a heavyweight PDF editor.