Combine Images Into a PDF on Mac — Free, No Desktop App Required

The fastest free way to combine images into a PDF on a Mac is to use WildandFree Image to PDF in Safari or Chrome. It lets you reorder images by dragging, choose your page size, and download a clean PDF — all without installing anything and without uploading files to any server.

Mac's built-in Preview can also create PDFs from images, but the workflow is clunky and page reordering is slow. For most use cases, the browser-based tool is faster and more flexible.

Mac Walkthrough: Images to PDF in Under a Minute

1. Open Safari (or Chrome) and go to WildandFree Tools.
2. Under PDF Tools, click Image to PDF.
3. Drag your images from Finder directly into the drop zone, or click to browse. You can hold Command and select multiple images at once in Finder, then drag the whole selection.
4. Reorder by dragging image cards in the tool. The order shown is the order in the PDF.
5. Select your page size — Fit to Image, Letter, or A4.
6. Click Convert to PDF. The PDF generates in your browser and downloads immediately to your Downloads folder.

The resulting PDF opens in Preview automatically. If you need to add annotations or merge it with other PDFs afterward, you can do that directly in Preview once the file is on your Mac.

This Tool vs Preview on Mac — Honest Comparison

macOS Preview can create PDFs from images, but it requires more steps:

• Open images in Preview
• Show the Thumbnails sidebar
• Drag additional images in one at a time
• Export as PDF

The main Preview limitation: reordering is done by dragging thumbnails in the sidebar, which is slow when you have many images. You also cannot change the page size per conversion — Preview inherits the image dimensions.

The browser tool lets you see all images laid out before converting, drag any card to any position, and explicitly choose between Fit to Image, Letter, or A4. For anything more than 3 images, it is significantly faster.

Where Preview still wins: for quick annotation after the PDF is created, or when you need to merge image-based PDFs with existing PDFs. Use Preview for that second step.

Sell Custom Apparel — We Handle Printing & Free Shipping

Pro Tip: Drag from Finder Directly Into Safari

The most efficient Mac workflow uses Finder side by side with your browser window.

Open a Finder window and navigate to your images. In Safari, load the Image to PDF tool. Now resize both windows so they are visible at the same time — Finder on one side, Safari on the other. Select all the images you want (Command+click for multiple), then drag them directly from Finder into the tool's drop zone in Safari.

All images appear in the tool at once in the order they were sorted in Finder. If you need a specific order, sort your Finder window by name (with numbered filenames like 01.jpg, 02.jpg) before dragging, and they will arrive in sequence.

This approach also works in Chrome on Mac. Chrome supports drag-and-drop from Finder with the same behavior.

Which Image Formats Work on Mac

The tool supports JPG, PNG, and WebP on Mac. These cover the vast majority of image files you will encounter. A few notes on less common formats:

HEIC: Not directly supported. Mac's Photos app stores iPhone imports as HEIC by default. To convert HEIC files, use the HEIC to JPG converter first, then combine them into the PDF. Alternatively, export from Photos as JPG (File → Export → Export Photos, choose JPG format).

TIFF: Large TIFF files from scanners are not directly supported. Export the TIFF as JPG or PNG first using Preview (File → Export), then use the PDF tool.

Screenshots: Mac screenshots (Command+Shift+3 or Command+Shift+4) save as PNG by default and work perfectly.

Frequently Asked Questions

Does this work on older Macs running macOS Monterey or earlier?

Yes. The tool works in Safari 15 and later, which covers macOS Big Sur, Monterey, Ventura, and Sonoma. For older Safari versions, use Chrome, which supports the same functionality on any macOS version from the last several years.

Can I use this to combine screenshots into one PDF on Mac?

Absolutely. Mac screenshots are PNG files and convert perfectly. This is a common workflow for creating documentation, tutorials, or report packages from a series of screenshots. Drag them from your Desktop into the tool, arrange them in order, and download the PDF.

My PDF output is very large. How do I reduce the file size?

File size is determined by the total resolution of your source images. The conversion preserves source quality without additional compression. To reduce file size, use our Compress PDF tool after converting — it typically reduces a 20MB image-based PDF to 3–5MB with no visible quality loss for screen display.

Can I combine images and existing PDFs into one document on Mac?

The Image to PDF tool creates a PDF from images only. To combine that with an existing PDF, download the image-based PDF, then use the Merge PDF tool to combine it with your other PDF files into one document.