The fastest way to edit a PDF on your Mac

You can edit PDFs directly on your Mac using Preview, the built-in app that opens most image and document files. Preview lets you add text, draw shapes, sign documents, and rearrange pages without downloading anything else. For basic edits — adding your initials, filling in a form, or marking up a document — Preview handles the job in seconds.

If you need more control, like changing existing text or removing content entirely, you'll need a dedicated PDF editor. Apple's built-in tools work best for marking up and annotating rather than rewriting what's already there.

Key Takeaways

  • Preview, which comes with every Mac, can add text boxes, signatures, shapes, and highlights to any PDF without installing new software.
  • To edit text that already exists in a PDF, you need a third-party editor like Adobe Acrobat, PDFtk, or Coherence X because Preview cannot change existing text.
  • Preview's markup tools appear in the toolbar at the top of the window — look for the toolbox icon to find text, signature, and drawing options.
  • Saving your changes in Preview overwrites the original file, so make a copy first if you need to keep the original unchanged.

Using Preview to add text and signatures

Open the PDF in Preview by right-clicking the file, selecting "Open With," and choosing Preview. Once the document is open, click the toolbox icon in the top toolbar (it looks like a pen tip in a circle). This reveals the markup tools.

To add a text box, click the "T" icon and then click anywhere on the PDF where you want text to appear. Type your content, then click outside the box when you're done. To sign the document, click the signature icon, select "Signature" from the dropdown, and either draw your signature with the trackpad or use your iPhone camera to photograph a written signature. Preview saves your signature for future documents.

For highlighting, underlining, or striking through text, use the pen and highlighter tools in the same toolbar. Click the tool, then drag across the text you want to mark. You can change colors by clicking the color circle next to each tool.

Rearranging and deleting pages in Preview

Click the sidebar icon in Preview's toolbar (three horizontal lines) to see thumbnails of all pages. You can drag pages up or down to reorder them, or right-click a page and select "Delete" to remove it entirely. This works without needing any other software.

If you want to extract just a few pages from a longer PDF, delete the ones you don't need, then save the result as a new file. Use File > Export As and give it a new name so you keep the original.

Editing text that already exists in the PDF

Preview cannot change or delete text that was already in the PDF when you opened it. If you need to edit existing words — correcting a typo, removing a sentence, or changing a date — you need a different tool.

Adobe Acrobat is the standard choice and costs $180 per year, though Adobe offers a free trial. It can edit any text in the PDF as if it were a word processor. PDFtk is a free command-line tool that works well for removing pages and filling forms, though it requires typing commands rather than clicking buttons. Coherence X costs $30 one-time and offers a middle ground — it handles text editing and form filling with a graphical interface.

For simple form-filling, many PDF forms work directly in Preview. Click a form field and type your answer. If the form doesn't respond to clicks, it's a scanned image rather than an interactive form, and you'll need to add text boxes instead.

Saving your edited PDF

In Preview, your changes are saved automatically to the original file as you work. If you want to keep the original unchanged, go to File > Duplicate before you start editing, then edit the copy instead.

To save your work with a new name or in a different location, use File > Export As. Choose PDF from the format dropdown, name your file, and click Save. This creates a separate file while leaving the original untouched.

Comparing Preview to paid PDF editors

Preview is free and fast for marking up documents, adding signatures, and rearranging pages. It's the right choice if you're filling out a form, signing a contract, or highlighting sections for review. Paid editors like Adobe Acrobat become necessary only when you need to change text that already exists in the PDF or perform advanced tasks like extracting images or merging multiple PDFs into one.

If you edit PDFs regularly as part of your work, a paid editor saves time. If you do it occasionally — signing a document once a month or marking up a contract — Preview handles everything you need.

Frequently Asked Questions

Can I edit a scanned PDF on my Mac?

A scanned PDF is an image, not text, so Preview cannot change the words inside it. You can add text boxes on top of it, but you cannot edit the scanned text itself. To edit scanned documents, you need OCR (optical character recognition) software like Adobe Acrobat or ABBYY FineReader, which converts the image into editable text first.

Why can't Preview edit the text in my PDF?

Preview is a viewer and markup tool, not a text editor. It can add new content on top of a PDF but cannot modify or delete text that was already there. This is a deliberate design choice — Preview prioritizes speed and simplicity over advanced editing. For text editing, use Adobe Acrobat or another dedicated PDF editor.

Does editing a PDF in Preview change the original file?

Yes. Preview saves changes directly to the file you opened. If you want to keep the original, duplicate the file first (File > Duplicate) and edit the copy instead. Alternatively, use File > Export As to save your work under a new name.

Can I merge two PDFs on my Mac without extra software?

Preview cannot merge PDFs, but you can use the Automator app that comes with macOS. Open Automator, create a new Quick Action, search for "Combine PDF Pages," drag it into your workflow, and select the PDFs you want to merge. This is free but requires a few extra steps compared to a dedicated PDF tool.