The fastest way: Print to PDF from any app

On a Mac, the simplest way to create a PDF is to use the Print dialog that comes built into macOS. Open any document — a web page, email, Word file, or Google Doc — then press Command+P to open Print. In the bottom-left corner of the dialog, you'll see a dropdown menu that says "PDF". Click it and select "Save as PDF". Name your file, choose where to save it, and click Save. The file appears on your Mac as a PDF.

This method works because macOS treats PDF creation as a printing function. Every app that can print can create a PDF this way, with no extra software needed. The PDF captures exactly what you see on screen, including formatting, images, and layout.

If you're converting a multi-page document like a spreadsheet or presentation, the Print dialog lets you choose which pages to include before you save. This is faster than creating one large PDF and then splitting it later.

Key Takeaways

  • Use Command+P in any app, select "PDF" from the dropdown menu, and choose "Save as PDF" to create a PDF without buying additional software.
  • Preview, the app that opens PDFs on Mac by default, can also create PDFs by opening an image or document and using File > Export As.
  • If you need to combine multiple files into one PDF, use Preview to open the first file, then drag other files into its sidebar to merge them.
  • For scanned documents or images, Preview can convert them to PDF and adjust quality, resolution, and file size before saving.

Using Preview to create and edit PDFs

Preview is the default app for opening PDFs on Mac, but it can also create them. Open an image file in Preview — a screenshot, photo, or scanned document — then go to File > Export As. In the dialog, change the file format dropdown from "Image" to "PDF", name your file, and click Save. Preview converts the image to a PDF when ready.

Preview is useful when you have multiple images you want to combine into a single PDF. Open the first image in Preview, then drag additional image files into the sidebar on the left. Preview stacks them in order. Go to File > Print, select PDF from the dropdown, and choose "Save as PDF" to merge all the images into one file.

You can also use Preview to reduce file size before saving. After opening an image, go to Tools > Adjust Size. Lower the resolution (72 dpi is fine for screen viewing, 150 dpi for printing) and Preview will compress the PDF when you export it. This is helpful if you need to email the file or upload it somewhere with size limits.

Converting scanned documents to searchable PDFs

If you scan a document using your Mac's built-in scanner or an app like Image Capture, the result is usually a regular image file. Preview can convert it to PDF, but the text inside won't be searchable — you can see the words but can't select or search them.

To make scanned text searchable, you need optical character recognition (OCR) software. macOS does not include OCR built-in, so you'll need a third-party tool. Apps like PDFpen, Prizmo, or even free online OCR services can read the text in your scan and embed it into the PDF so you can search and select it later.

If you only occasionally scan documents, an online OCR tool may be faster than buying software. Upload your scanned image, let the tool process it, and read the searchable PDF. If you scan regularly, a dedicated app is more convenient because it integrates with your workflow and doesn't require uploading files to the internet.

Combining multiple documents into one PDF

The easiest way to merge documents on Mac is to use Preview. Open the first PDF or image file in Preview. In the sidebar on the left, you'll see a thumbnail of the first page. Drag additional PDF files or images into this sidebar, and Preview adds them to the stack in the order you drop them.

Once all files are in the sidebar, you can rearrange them by dragging thumbnails up or down. To remove a page, click its thumbnail and press Delete. When the order is correct, go to File > Print, select PDF from the dropdown, and choose "Save as PDF". Preview merges all the pages into a single file.

If you need more control — like rotating pages, deleting specific pages from the middle, or adding annotations — Preview handles all of these. Right-click any page thumbnail in the sidebar to rotate it, or click a page and press Delete to remove it. These changes explore when you save the merged PDF.

Creating fillable forms and adding annotations

Preview can add text, signatures, and shapes to an existing PDF, but it cannot create fillable form fields that others can type into. If you need to add a signature to a document, open the PDF in Preview, click the Markup toolbar (the toolbox icon in the top-right), and select the signature tool. Sign on your trackpad or use your camera to capture a handwritten signature, and Preview places it on the PDF.

To add text or drawings, use the text tool or drawing tools in the Markup menu. These changes are saved to the PDF when you press Command+S. However, if you need to create a form where someone else can fill in blanks and save their answers, Preview is not the right tool — you'll need software like Adobe Acrobat, PDFpen, or a free online form builder.

For most everyday tasks — signing a document, highlighting text, or adding a note — Preview's markup tools are sufficient and cost nothing. The limitation only matters if you're designing forms for others to complete.

Saving web pages as PDFs

When you're reading a web page and want to save it as a PDF, use Command+P to open the Print dialog in your browser. Select "PDF" from the dropdown and choose "Save as PDF". The entire page — or the pages you select — saves as a PDF file on your Mac. This preserves the layout, images, and text exactly as they appear in the browser.

Some websites are designed to print poorly, with ads or navigation elements that clutter the PDF. If that happens, try using your browser's "Print to PDF" feature instead of the system Print dialog — Safari, Chrome, and Firefox all have slightly different rendering, so one may work better than another for a specific site.

If you need to save a web page and want to keep it exactly as it appears online, including interactive elements, consider using your browser's "Save Page As" feature instead. This saves the HTML file rather than a PDF, but it preserves more of the original page's functionality.

Choosing between built-in tools and third-party apps

For basic PDF creation — converting documents, merging files, or adding a signature — macOS's built-in tools (Print dialog and Preview) handle everything you need without cost. You don't need to buy software unless you have a specific requirement they don't meet.

Third-party PDF apps become useful when you need features like OCR for scanned documents, batch processing of many files at once, advanced form creation, or detailed editing of PDF content. Apps like PDFpen, Acrobat, or Nitro offer these features, but they cost money and take up storage space. Before buying, confirm that the built-in tools actually can't do what you need.

A practical approach is to start with Preview and the Print dialog. If you run into a task they can't handle, that's the time to research a paid app. Most people find that the built-in tools cover their everyday PDF needs.

Frequently Asked Questions

Can I create a PDF from a Word document on Mac?

Yes. Open the Word document, press Command+P, select "PDF" from the dropdown menu, and choose "Save as PDF". Word preserves formatting, fonts, and images in the PDF. You can also use File > Export As in Word itself, which gives you the same result.

How do I reduce the file size of a PDF on Mac?

Open the PDF in Preview, go to Tools > Adjust Size, and lower the resolution. For screen viewing, 72 dpi is standard; for printing, use 150 dpi or higher. After adjusting, export the file as a PDF and Preview will compress it. For more aggressive compression, use a third-party tool or an online PDF compressor.

What if I need to edit text inside an existing PDF?

Preview can add text on top of a PDF using the Markup tools, but it cannot edit the original text. To change words that are already in the PDF, you need software like PDFpen, Acrobat, or an online PDF editor. If the PDF came from a Word document, edit the Word file and create a new PDF instead.

Can I password-protect a PDF I create on Mac?

The built-in Print dialog does not offer password protection. To add a password, use Preview to open the PDF, go to File > Export As, and look for a security or encryption option in the export dialog. Some third-party apps and online tools also offer password protection if Preview doesn't meet your needs.

How do I scan a document and turn it into a PDF on Mac?

Use the Image Capture app (in Applications > Utilities) to scan the document. Save it as an image file, then open it in Preview and export it as a PDF. If you need the text to be searchable, you'll need OCR software, which macOS does not include by default.