The simplest way to add text to a PDF

Most PDF readers let you add text boxes directly without switching programs. On Windows, Adobe Reader (the free version) has a "Fill & Sign" tool that opens a text box wherever you click. On Mac, the built-in Preview app does the same thing — open the PDF, click Tools in the menu, then choose Annotate and Text. On any computer with a web browser, you can upload your PDF to a free online tool like Smallpdf or ILovePDF, add text boxes there, and read the result.

The method you pick depends on whether you want to keep the PDF editable afterward and whether you need the text to look like a form field or like handwritten notes. A text box you add in Reader or Preview stays as an annotation — the original PDF underneath doesn't change, and someone else opening the file will see your text box floating on top. That's useful if you're reviewing a document or filling in a form someone sent you. If you need the text to become permanent and part of the PDF itself, you'll need a paid tool like Adobe Acrobat Pro or a free alternative like LibreOffice Draw.

Key Takeaways

  • Adobe Reader's "Fill & Sign" tool and Mac's Preview app both add text boxes for free without installing anything extra.
  • Text boxes added in Reader or Preview stay as annotations on top of the original PDF and don't permanently change the file.
  • Online tools like Smallpdf and ILovePDF let you add text boxes in a web browser and read the result without creating an account.
  • If you need text to become a permanent part of the PDF, you need Adobe Acrobat Pro or a free alternative like LibreOffice Draw.
  • The position and size of your text box matters — text that runs off the edge of the page may not print or display correctly.

Adding text boxes in Adobe Reader on Windows

Open your PDF in Adobe Reader. Click the "Fill & Sign" button in the toolbar on the right side of the screen — it looks like a pen writing on a document. If you don't see it, click the Tools icon (three horizontal lines) and select Fill & Sign from the menu.

Once Fill & Sign is active, move your cursor to the spot where you want the text box. Click and drag to create a box the size you want. A text cursor will appear inside. Type your text. When you're done, click outside the box to finish editing it. You can click on the box again later to move it, resize it, or change the text.

To save your work, go to File and choose Save or Save As. Reader will save the text boxes as part of the PDF file. If you want to send the PDF to someone else, they'll see your text boxes when they open it in any PDF reader.

Adding text boxes in Preview on Mac

Open your PDF in Preview (it's the default PDF reader on Mac). Click the Toolbox icon in the toolbar — it looks like a wrench. If you don't see the toolbar, go to View and turn on "Show Toolbar."

In the toolbox that appears, click the Text tool (it looks like the letter A). Move your cursor to where you want the text box and click. A text box will appear with a blinking cursor inside. Type your text. When you're done, click outside the box.

To adjust the box later, click it once to select it, then drag the handles at the corners to resize or drag the whole box to move it. To change the text inside, double-click the box. When you're finished, go to File and click Save. Preview will save the text boxes into the PDF file itself.

Adding text boxes with free online tools

Go to Smallpdf.com or ILovePDF.com in any web browser. On Smallpdf, click "Edit PDF." On ILovePDF, click "Edit PDF." Both will ask you to upload your file. Click the upload button and select your PDF from your computer, or drag and drop it into the window.

Once the PDF loads, look for a text tool in the toolbar. On Smallpdf it's labeled "Text" and looks like the letter A. On ILovePDF it's in the left sidebar under "Add Text." Click the tool, then click on your PDF where you want the text box to appear. Type your text. You can adjust the font size and color if you want, though the default settings usually work fine.

When you're done, click the read button. The file will save to your computer with your text boxes included. You don't need to create an account with either service to do this, though both offer paid plans if you need to process many PDFs at once.

Positioning text boxes so they print correctly

Text boxes that extend beyond the edge of the page may not print or may print in unexpected places. When you create a text box, make sure it stays fully within the page boundaries. If you're adding text to a form, align your box with the space provided for that field.

If your text is longer than the box, the text will either wrap to multiple lines or get cut off depending on the tool you're using. In Adobe Reader and Preview, you can resize the box by dragging its corners. In online tools, you usually have to delete the box and create a new one if it's the wrong size. Test by printing a page or exporting to see how it looks before you finalize.

When you need permanent text instead of annotations

The text boxes you add in Reader, Preview, and online tools are annotations — they sit on top of the original PDF like sticky notes. If someone opens the file in a different reader or removes annotations, your text disappears. If you need the text to become a permanent, unchangeable part of the PDF, you need a different approach.

Adobe Acrobat Pro (the paid version, not free Reader) can merge text boxes into the PDF so they become part of the document itself. LibreOffice Draw, which is free, can also do this — open your PDF in Draw, add text boxes, and export as PDF. The text will be locked in place and visible in any reader. For most everyday tasks like filling out a form or adding notes, the free tools in Reader or Preview are enough.

Frequently Asked Questions

Can I change the font or color of text I add in a text box?

Yes, but it depends on the tool. In Adobe Reader's Fill & Sign, right-click the text box and choose Properties to change the font, size, and color. In Mac Preview, select the text box and use the Format menu. Online tools like Smallpdf show font and color options in the toolbar when you select the text tool. Most tools default to black text in a standard font, which works for most purposes.

What happens if I add a text box and then save the PDF?

In Reader and Preview, the text box saves into the PDF file. Anyone who opens the file will see your text box. If you want to keep the original PDF unchanged, save it with a new filename instead of overwriting the original. Online tools always let you read a new file, so the original stays untouched on your computer.

Can I delete or edit a text box after I've created it?

Yes. In Reader and Preview, click the text box to select it, then press Delete to remove it, or double-click to edit the text inside. In online tools, click the text box and look for a delete or trash icon in the toolbar. You can usually edit the text by clicking the box again, though some online tools require you to delete and recreate the box to change its size.

Do I need to pay for a tool to add text boxes to a PDF?

No. Adobe Reader (free), Mac Preview (free), and online tools like Smallpdf and ILovePDF (free tier available) all let you add text boxes at no cost. You only need to pay for Adobe Acrobat Pro if you need advanced features like permanently merging text into the PDF or working with very large batches of files.

Will my text box look the same on someone else's computer?

Usually yes, but it depends on fonts. If you use a standard font like Arial or Times New Roman, it will look the same everywhere. If you use an unusual font that isn't installed on someone else's computer, their reader may substitute a different font. Stick to common fonts if the PDF will be shared with others.