Need to convert a PNG image into a PDF on your MacBook or iMac? This PNG to PDF Mac guide covers three simple ways to do it. Whether you're working with screenshots, scanned documents, receipts, assignments, or graphics, macOS provides several ways to create PDF files without installing additional software.
One of the easiest options is Preview, Apple's built-in image and PDF viewer. You can also use the macOS Print dialog or a browser-based converter to combine multiple images and adjust document settings.
In this guide, you'll learn how to convert PNG to PDF on Mac using three practical methods, how to combine multiple PNG images into one PDF, and how to preserve image quality.
Quick Answer: How Do You Convert PNG to PDF on Mac?
The quickest method is to use Preview.
Open your PNG image in Preview.
Click File in the menu bar.
Select Export as PDF, if available.
Choose a filename and save location.
Click Save.
Your PNG image will be converted into a PDF document.
If you need to combine multiple images or customize page settings, you can also use the OneFileKit PNG to PDF Converter.
Method 1: Convert PNG to PDF Using Mac Preview
Preview is a built-in macOS application that can open images, PDFs, and several other file formats.
It is a convenient option for converting individual PNG images into PDF documents.
Step 1: Locate your PNG image
Open Finder and navigate to the folder containing your PNG file.
For example, your image might be saved in Downloads, Desktop, or Pictures.
Step 2: Open the PNG in Preview
Double-click the image if Preview is your default application.
Otherwise, right-click the PNG file and choose Open With → Preview.
Step 3: Open the File menu
With the image open, click File in the macOS menu bar.
Step 4: Select Export as PDF
Choose Export as PDF, if the option is available in your version of Preview.
A save dialog will appear.
Step 5: Choose the destination
Enter a filename and select the folder where you want to save the document.
For example:
scanned-document.pdf
Step 6: Save the PDF
Click Save.
Preview will create a PDF version of the image.
Advantages of using Preview
Preview is useful because it comes with macOS, works without an internet connection, and is suitable for everyday image-to-PDF conversion.
However, some page-layout and image-arrangement options may be easier to manage using a dedicated converter.
For official information, visit the Apple Preview User Guide.
Method 2: Convert PNG to PDF Using the Mac Print Dialog
macOS includes a PDF saving option in its Print dialog.
This provides another way to convert PNG images into PDF documents.
Step 1: Open the PNG image
Open your image in Preview or another application that supports printing.
Step 2: Open the Print dialog
Press Command + P.
Alternatively, choose File → Print.
Step 3: Choose page settings
Review the available settings, including paper size, orientation, scaling, and image positioning.
For example, you might choose A4 for a standard document or landscape orientation for a wide screenshot.
Step 4: Open the PDF menu
Look for the PDF menu or button in the Print dialog.
Choose Save as PDF.
Step 5: Save your document
Enter a filename, choose a location, and click Save.
Your PNG image is now saved as a PDF.
When should you use this method?
The Print dialog is particularly useful when you want to control how the image appears on a standard paper size.
For example, if you have a PNG screenshot that needs to fit on an A4 page, you can review the page layout before creating the PDF.
Method 3: Convert PNG to PDF Online on Mac with OneFileKit
A browser-based converter can be useful when you need to combine multiple PNG images into one PDF or choose additional layout settings.
Step 1: Open the converter
Open Safari, Chrome, Firefox, or another compatible browser on your Mac.
Visit OneFileKit PNG to PDF.
Step 2: Upload your PNG images
Click the image selection button or drag and drop your PNG files into the upload area.
If you're creating a multipage PDF, select all the images you want to include.
Step 3: Arrange your images
Use the available image-ordering controls to organize the files.
For example, if you're converting scanned pages, arrange them in reading order.
Step 4: Choose PDF settings
Depending on the available controls, you may be able to choose:
A4, Letter, Legal, or original image dimensions.
Portrait or landscape orientation.
Page margins.
Image fitting.
Image quality.
Step 5: Convert to PDF
Click Convert to PDF.
Wait for the processing to finish.
Step 6: Download the PDF
Download the completed PDF to your Mac.
Open it in Preview to verify that the images appear in the correct order.
Best for: Users who want to combine multiple PNG images into one document and configure PDF layout options through a browser.
How to Combine Multiple PNG Images into One PDF on Mac
Sometimes you need to combine several images into a single PDF rather than converting them separately.
For example, you might have five scanned pages saved as PNG files and want to turn them into one five-page PDF.
macOS Preview can help you do this.
Step 1: Select the PNG files
Open Finder and locate the PNG images.
Select the files you want to combine.
Step 2: Open the images in Preview
Right-click the selected images and choose Open With → Preview.
Depending on your settings, the images may open in one window or multiple windows.
Step 3: Show the thumbnail sidebar
In Preview, choose View → Thumbnails.
The sidebar displays thumbnails of the open images or pages.
Step 4: Arrange the images
If necessary, drag image thumbnails into one Preview document.
Reorder them by dragging thumbnails up or down.
For example:
page-01.png
page-02.png
page-03.png
page-04.png
Step 5: Select the pages
Select the thumbnails you want included in the PDF.
Step 6: Save as PDF
Open the Print dialog and use Save as PDF.
Review the finished PDF to confirm that all images were included.
For more detailed instructions, see our guide on combining multiple PNG images into one PDF.
How to Convert PNG to PDF Without Losing Quality on Mac
PNG uses lossless compression, which makes it suitable for screenshots, scanned documents, graphics, and images containing sharp text.
However, converting PNG to PDF may involve resizing or recompression depending on the software and settings used.
To preserve image quality, follow these recommendations.
Use the original PNG image
Avoid converting a low-resolution screenshot or compressed copy if you have access to the original file.
Preserve the image's aspect ratio
If the image is stretched to fit a different page shape, it may appear distorted.
Use appropriate scaling or fitting options.
Choose the correct paper size
For printing, choose a page size that matches your intended document.
For screen-only documents, retaining the original image proportions may be more important.
Avoid unnecessary compression
If the conversion tool offers image quality controls, choose settings that preserve detail.
Check the PDF after conversion
Open the PDF in Preview and compare it with the original PNG.
Look at text, thin lines, graphics, and other fine details.
For more information, read How to Convert PNG to PDF Without Losing Quality.
PNG to PDF Mac: Preview vs Online Converter
Feature | Mac Preview | OneFileKit |
|---|---|---|
Software installation | Not required | Not required |
Internet connection | Not required | Required |
Single PNG conversion | Supported | Supported |
Multiple PNG images | Supported through Preview workflows | Supported if enabled in the converter |
Page ordering | Available through thumbnails | Available through tool controls |
Paper size options | Available through printing | Depends on converter settings |
Works in a browser | No | Yes |
Works offline | Yes | No |
Preview is a good option for converting individual images and performing basic PDF tasks.
An online converter may be more convenient when you need a dedicated interface for arranging multiple images or adjusting output settings.
How to Save a Mac Screenshot as PDF
Mac screenshots are commonly saved as PNG files.
If you want to submit a screenshot as a PDF, you can convert it using Preview.
Step 1: Take a screenshot
Press Command + Shift + 4 to capture a selected area.
You can also use Command + Shift + 3 to capture the entire screen.
Step 2: Find the screenshot
Screenshots are often saved to the Desktop unless you've changed the default location.
Step 3: Open in Preview
Double-click the screenshot or choose Open With → Preview.
Step 4: Export as PDF
Choose File → Export as PDF, if available.
Step 5: Save the document
Select a filename and destination folder.
This is useful when submitting screenshots for technical support, assignments, reports, or other document workflows.
Common PNG to PDF Problems on Mac and How to Fix Them
Problem 1: Export as PDF is missing
Possible cause: The menu options differ depending on the macOS version or the application being used.
Solution: Use File → Print and select Save as PDF from the PDF menu.
Problem 2: The image is cropped
Possible cause: The image does not fit the selected paper dimensions or a crop-to-fill option is enabled.
Solution: Change the page orientation or choose a fitting option that preserves the entire image.
Problem 3: The PDF looks blurry
Possible cause: The source image has low resolution or was resized during conversion.
Solution: Use a higher-resolution PNG and avoid unnecessary enlargement.
Problem 4: Images appear in the wrong order
Possible cause: The images were sorted or selected differently than expected.
Solution: Arrange the thumbnails in Preview before saving the PDF.
Problem 5: The PDF file is too large
Possible cause: The document contains several high-resolution images.
Solution: Reduce unnecessary image dimensions or use a PDF compressor after conversion.
Problem 6: Transparent PNG backgrounds become white
Possible cause: The conversion workflow flattened transparency against a page background.
Solution: Check the output and use a conversion workflow that supports the transparency behavior you need.
Final Thoughts
Converting PNG to PDF on Mac is straightforward, whether you're using a MacBook Air, MacBook Pro, or iMac.
For a single image, Preview is often the simplest choice. If you need to control page dimensions, the macOS Print dialog provides additional options.
For combining multiple PNG images into one document, try the OneFileKit PNG to PDF Converter.
