The simplest way to sign a document on your computer
The fastest method depends on what you already have. If the document is a PDF and you're using Windows 10 or 11, open it in Microsoft Edge, click the pen icon in the toolbar, draw your signature, and save. On a Mac, Preview does the same thing — open the PDF, click the markup toolbar, select the signature tool, and your signature appears on the page.
If the document came from Google Docs or Microsoft Word online, you can sign without leaving the application. In Google Docs, go to Insert > Drawing, sketch your signature, click Save and Close, and it embeds in the document. In Word online, use Insert > Signature Line, which creates a formal signature block you can click to add your name and initials.
For documents that need to go back and forth between people — contracts, agreements, forms — a dedicated signing tool like DocuSign, Adobe Sign, or HelloSign handles the routing and keeps a record that you signed on a specific date. These services cost money for regular use, but many offer a free tier for occasional signing.
Key Takeaways
- Built-in tools in Edge, Preview, Google Docs, and Word let you sign PDFs and documents without installing anything new.
- Drawing your signature with a mouse or trackpad works, but a stylus or touchscreen produces a more natural-looking result.
- Dedicated signing services like DocuSign create a legal record that proves when and where you signed, which matters for contracts and official documents.
- Typed signatures, initials, or a scanned image of your handwritten signature are legally valid in most situations, though some documents require a handwritten original.
Using your computer's built-in tools
Every major operating system includes a way to mark up and sign PDFs without extra software. On Windows, Microsoft Edge is the easiest route. Open your PDF in Edge, look for the pen icon in the top toolbar (it looks like a ballpoint pen), and click it. A drawing toolbar appears at the bottom. Select the pen tool, set your line thickness if you want, and draw your signature directly on the document. When you're done, press Escape to exit drawing mode and save the file.
On Mac, open the PDF in Preview (the default PDF viewer). Click the markup toolbar button — it looks like a toolbox — and select the signature tool. The first time you use it, Preview asks you to sign on your trackpad or take a photo of your signature with your webcam. After that, your signature is stored and you can click to place it anywhere on the page. You can resize it by dragging the corners.
Google Docs and Microsoft Word online both let you insert a signature without downloading anything. In Google Docs, go to Insert > Drawing > New, sketch your signature in the drawing box, click Save and Close, and it becomes an image in your document. In Word online, go to Insert > Signature Line, fill in the signer's name and title if needed, click OK, and a signature block appears. You can click it later to add your name.
When you need a more formal record
If someone is sending you a contract or an agreement that you both need to sign, or if you need proof that you signed on a specific date, a dedicated signing service creates that record automatically. DocuSign, Adobe Sign, and HelloSign all work the same way: the sender uploads a document, marks where signatures go, and sends you a link. You open the link, sign on screen, and the service records the date, time, and IP address of your signature.
These services are most useful when documents move between multiple people. If a contract needs your signature and your spouse's signature, the service can route it to you first, then automatically send it to your spouse, then back to the original sender — all without email back-and-forth. The final document shows who signed, when they signed, and in what order.
DocuSign and Adobe Sign both charge per signature or per month for regular use. HelloSign (owned by Dropbox) offers a free tier that lets you sign and send a few documents per month. Many banks and insurance companies use these services, so you may have already signed documents this way without realizing it.
Typing your name versus drawing your signature
A typed name, your initials, or a scanned image of your handwritten signature are all legally valid in most situations in the United States and Canada. The law does not require your signature to be handwritten — it requires intent to sign and a record that you did. A typed name in a Word document, a digital signature created by a signing service, or a photo of your handwriting all meet that standard.
The exception is documents that explicitly state they require a handwritten original — some notarized documents, certain legal filings, and some financial forms. If you're unsure, ask the person or organization requesting the signature whether a digital version is acceptable. Most will say yes.
If you want your signature to look handwritten but you're not comfortable drawing with a mouse, take a photo of your actual signature on paper, crop it in any photo editor, and insert it as an image into your document. This is faster than trying to draw with a trackpad and looks more natural.
Using a stylus or touchscreen for a better result
Drawing a signature with a mouse or trackpad is possible but awkward. If you have a stylus — either a dedicated pen for a graphics tablet or the stylus that comes with a touchscreen laptop or iPad — use it instead. The result looks much more like your actual signature and takes less effort.
On a Windows touchscreen, open your PDF in Edge and use the pen tool as described above. The pen will respond to pressure and angle, so your signature looks natural. On an iPad, you can use the built-in Markup tools in Mail or Notes, or use a dedicated app like GoodNotes or Notability if you sign documents regularly.
If you don't own a stylus but sign documents often, a basic capacitive stylus costs $10 to $30 and works with any touchscreen. A pressure-sensitive stylus for an iPad or Surface device costs more but gives you finer control.
Keeping your signature secure
Once you've created a digital signature — whether by drawing it, typing it, or scanning it — treat it like a password. If you use the same signature image in multiple documents, anyone with access to one document can copy that image and use it on another. This is why dedicated signing services are more secure: they tie your signature to a specific document and record when it was added.
If you're signing a document that will be shared widely or stored in a shared folder, consider using a signing service instead of embedding your signature image. If you're signing something for personal use or internal company documents, a simple drawn or scanned signature is fine.
Never share screenshots or copies of signed documents with people who don't need them. If a document contains your signature, your name, and other personal details, treat it like you would a printed document with your actual signature on it.
What to do if the document won't let you sign
Some PDFs are locked and won't let you draw on them. This usually means the creator protected the file to prevent changes. You have a few options: ask the sender for an unlocked version, use a free PDF unlocking tool like SmallPDF or ILovePDF (upload the file, download the unlocked version), or print the document, sign it by hand, and scan it back in.
If a form has specific signature fields that won't activate, the document may have been created in a way that requires a specific signing tool. Ask the sender which tool they used or which tool they expect you to use. If they sent it through DocuSign or Adobe Sign, you should have received a link to sign it there, not the PDF file itself.
For older documents or scanned forms, sometimes the simplest solution is to print, sign by hand, and scan. A smartphone camera or a free scanning app like Adobe Scan or Microsoft Lens turns a photo into a clean PDF in seconds.
Frequently Asked Questions
Is a digital signature legally binding?
Yes, in the United States and Canada, a digital signature is legally binding for most documents. The law requires intent to sign and a record that you did — not a handwritten original. Contracts, agreements, and financial documents signed digitally are enforceable in court. The exception is documents that explicitly require a handwritten original, which are rare.
Can I use the same signature image on every document?
You can, but it's less secure than using a signing service that ties each signature to a specific document and date. If you reuse the same image, anyone with access to one signed document can copy your signature and paste it on another. For important documents, use DocuSign or Adobe Sign instead.
What if I don't have a stylus and my trackpad is too hard to use?
Type your name or initials instead, or take a photo of your actual signature on paper, crop it, and insert it as an image. Both are legally valid. If you sign documents regularly, a basic stylus costs $10 to $30 and makes drawing much easier.
Do I need to download software to sign a document?
No. Edge, Preview, Google Docs, and Word online all let you sign without installing anything. If you use a dedicated signing service like DocuSign, you don't download software — you just open a link in your browser and sign there.
What happens if I sign a document by mistake?
If you signed through a service like DocuSign, contact the sender immediately and ask them to void the document and send a new one. If you drew your signature on a PDF, you can undo the drawing (Ctrl+Z or Command+Z) before saving, or delete the file and ask for a fresh copy. Once you save and send a signed document, it's harder to undo.