How to Edit a PDF on a Mac for Free

Every Mac comes with a free PDF editor already installed: Preview. For most forms and signatures, it's all you need. Here's how to use it, plus a browser-based option for when you'd rather keep the original file untouched or use the same tool on other devices.

Option 1: Edit a PDF in Preview

  1. Open the PDF. Double-click it; PDFs open in Preview unless you've set another app.
  2. Fill in a form. Click a field and type. If the form won't let you type into it, show the Markup toolbar and add a text box instead, then drag it into place.
  3. Sign it. In the Markup toolbar, click the signature button and create a signature with your trackpad, your Mac's camera or your iPhone. Drag it onto the line and use the handles to resize it.
  4. Save. Preview saves your changes into the same file. If you want to keep the original as it was, make a copy first with File > Duplicate.

Apple's guide Fill out and sign PDF forms in Preview on Mac walks through each step.

Option 2: Edit a PDF in your browser

This works in Safari or Chrome on your Mac and leaves the original file untouched.

  1. Open an online PDF editor and choose your PDF, or drag it from Finder onto the page.
  2. Add text anywhere: press Add text, click on the page and type. Choose a font, size and colour, then drag the text into place.
  3. Fill in form fields by clicking them, and use ✓, ✗ and Date for tick boxes and today's date.
  4. Sign with Add signature: draw with your trackpad, type your name in a handwriting style, or use a photo of your signature.
  5. Change pages in Pages: rotate, delete, drag to reorder, add a blank page or add the pages of another PDF.
  6. Press Download edited PDF. The copy goes to your Downloads folder with "-edited" added to the name.

Made a mistake? Press ⌘Z to undo.

Which should you use?

  • Preview is already on your Mac and works without an internet connection.
  • The browser editor keeps your original file as it was, works the same on your iPhone or a Windows PC, and needs no account. The PDF is opened and saved in your browser rather than uploaded.

Either way, you don't need to pay for a PDF editor to fill in, sign or tidy up a PDF on a Mac.

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