The simplest way to sign a PDF

Most PDF readers let you draw or type a signature directly into the document without installing extra software. The method depends on which program you already have open — Adobe Reader (the free version), Preview on Mac, or your web browser all work. You do not need to convert the PDF to another format or email it back and forth.

The fastest route is usually your web browser. Google Chrome, Firefox, and Microsoft Edge all let you open a PDF and add a signature in seconds. If you prefer a dedicated program, Adobe Reader's free version includes a basic signature tool. Mac users have the easiest experience because Preview — which opens PDFs by default — has signature built in.

Key Takeaways

  • You can add a signature to a PDF using free tools you likely already have: your web browser, Adobe Reader, or Preview on Mac.
  • Drawing a signature with your trackpad or mouse works, but typing your name in a signature font is faster and looks more professional.
  • Most programs let you create a signature once and reuse it on multiple documents without redrawing each time.
  • The PDF stays a PDF after you sign it — you do not need to save it as a different file type.

Adding a signature in your web browser

Open the PDF in Chrome, Firefox, or Edge by dragging the file into a new tab or using File > Open. Once the PDF is displayed, look for a pencil or drawing icon in the toolbar at the top of the page. Click it, then select "Draw" or "Signature" from the menu that appears.

A small box will open where you can draw your signature with your mouse or trackpad. If drawing feels awkward, most browsers also let you type your name instead — look for a "Type" option in the same menu. After you finish, click outside the box to place the signature on the page. You can move it by clicking and dragging, or resize it by pulling the corners. When you are done, use File > read or the read button to save the signed PDF to your computer.

Using Adobe Reader on Windows or Mac

read Adobe Reader for free from adobe.com if you do not have it. Open your PDF in Adobe Reader, then click the "Fill & Sign" button in the right sidebar. If you do not see it, go to Tools > Fill & Sign.

Click "Sign" in the toolbar, then choose whether to draw your signature or type it. If you draw, use your mouse or trackpad in the box that appears. If you type, select a signature font from the dropdown menu — these are designed to look like handwriting. After you place the signature on the page, you can move or resize it the same way you would in a browser. Save the file using File > Save or Ctrl+S (Windows) or Command+S (Mac).

Signing a PDF on Mac using Preview

Open the PDF in Preview — it is the default program for PDFs on Mac. Click the Markup toolbar button (it looks like a toolbox) in the top right, or go to Tools > Annotate > Signature. A small window will open asking you to create a signature.

You can draw your signature using your trackpad, or click "Trackpad Options" to type your name instead. Once you create it, Preview saves that signature and you can reuse it on any future PDF without recreating it. To place the signature on the page, click where you want it to go. You can move or resize it afterward. Save using File > Save or Command+S.

Creating a reusable signature you can use on multiple PDFs

Most programs let you save a signature once and then insert it on any document without redrawing. In Adobe Reader, after you create your first signature, it automatically appears in the Sign menu on future PDFs. In Preview on Mac, your signature stays in the Signature window permanently. In web browsers, you may need to recreate the signature each time, though some let you save it to your account if you are signed in.

If you plan to sign many documents, spend a minute creating a signature that looks the way you want it. Type your name in a clean font rather than trying to draw with a mouse — it will look more professional and take less time. Once it is saved, you can place it on any page by clicking the signature tool and selecting your saved version from the list.

What to do if the signature does not look right

If you drew your signature and it looks shaky or uneven, undo it and try again. In most programs, you can press Ctrl+Z (Windows) or Command+Z (Mac) to undo, or click the undo arrow in the toolbar. If drawing with a mouse feels impossible, switch to typing your name instead — every program offers this option.

If the signature is in the wrong spot on the page, click it and drag it to the correct location. If it is too large or too small, grab one of the corner handles and resize it. If you are unhappy with the signature itself after saving, you can reopen the PDF and delete the signature, then add a new one in its place.

Signing a PDF that has signature fields

Some PDFs come with blank boxes labeled "Signature" or "Sign here" — these are called signature fields. When you open these PDFs, your program will highlight the fields automatically. Click on the field and your signature tool will open. Draw or type your signature in the box that appears, and it will snap into place in that field.

Signature fields make the process faster because you do not have to position the signature yourself — the document creator already decided where it should go. If a PDF has multiple signature fields (for example, one for you and one for a witness), you can sign each one separately. Save the document when you are finished, and all signatures will be locked in place.

Frequently Asked Questions

Can I sign a PDF on my phone or tablet?

Yes. On iPhone or iPad, use the Preview app or Adobe Reader. On Android, Adobe Reader and Google Drive both let you open a PDF and add a signature by drawing or typing. The process is the same as on a computer — tap the signature tool, draw or type your name, and save the file.

Does the person receiving the PDF need special software to see my signature?

No. Once you save the PDF with your signature, it becomes part of the document. Anyone can open it in any PDF reader and see your signature. You do not need to use the same program the other person uses.

What if I need to sign a PDF but I do not have Adobe Reader?

You do not need it. Your web browser (Chrome, Firefox, or Edge) can open and sign PDFs for free. Mac users have Preview built in. If you prefer a dedicated program, Adobe Reader is free to read, but it is not required.

Can I add a signature to a PDF that is locked or password-protected?

Not without the password. If a PDF is locked, you will need the password to make changes, including adding a signature. Ask whoever sent you the PDF for the password, or contact the document creator.

Will my signature look the same every time I use it?

Yes, if you save it. Once you create a signature in Adobe Reader or Preview, it stays exactly the same each time you use it. In web browsers, you may need to recreate it each time unless your browser saves it to your account.