How to Convert Images to PDF (JPG, PNG, WebP)

Why convert images to a PDF?

A folder of photos is easy to fill, but hard to share. Send 20 JPEGs by email and you get 20 attachments, 20 download prompts, and 20 "this file is too large" warnings. A single PDF of those same photos is one attachment, one download, one neat bundle. Converting images to a PDF is one of those small tasks that comes up constantly — and the right tool turns a 5-minute chore into a 30-second one.

The reasons people need to combine images into a PDF are practical and frequent:

• Photo albums: A vacation, a wedding, a family event. Combine 50 photos into one shareable PDF instead of zipping them.
• Scanned documents: A multi-page document you scanned page by page as JPEGs. Combine them back into a single PDF that prints and emails cleanly.
• Receipts and invoices: Snap a photo of every receipt on a trip. Combine into a single PDF for expense reports.
• Sketches and whiteboards: Photograph a whiteboard, sketch, or diagram. Combine into a PDF for sharing.
• Real-estate listings: A property gets a cover photo, several interior photos, a floor plan. Bundle them into one PDF brochure.
• Portfolios: A photographer, designer, or architect can combine a body of work into a single PDF for clients.
• Easier to print: A PDF of 20 images prints exactly as ordered, page by page, no manual layout needed.

The good news: with the right tool, combining images into a PDF is a 30-second drag-and-drop job, and you do not need to install anything.

Method 1: Use UtilBoxx's Free Image to PDF Tool (Recommended)

The fastest, safest, and most private way to combine images into a PDF is UtilBoxx's Image to PDF tool. It runs entirely in your browser, so your images never leave your device. There is no upload, no signup, no watermark, and no daily limit.

Here is how to use it:

1. Go to utilboxx.com/en/tools/pdf/image-to-pdf
2. Drag in your images (or click to browse). You can mix JPG, PNG, and WebP in the same PDF.
3. Reorder the images by drag-and-drop. The thumbnails show the order they will appear in the PDF.
4. Pick the page size: A4, Letter, or Fit to image (each image becomes its own page sized to fit the photo).
5. Pick the orientation: Portrait or Landscape (or auto).
6. Click "Process"
7. Download the new PDF

Why we recommend this method:

• 100% free, no account, no signup, no email gate
• Privacy-first: everything happens locally in your browser. The images never reach a server.
• Three formats supported: JPG, PNG, and WebP in the same PDF
• Drag-and-drop reordering: see the page order, drag to rearrange
• Custom page size: A4, Letter, or fit-to-image
• Works on any device: Windows, Mac, Linux, ChromeOS, iOS, Android
• No watermarks on the output
• No quality loss: images are embedded at full resolution

If you only need to combine images occasionally, this is by far the lowest-friction option.

Method 2: macOS Preview

On a Mac, the built-in Preview app can turn a folder of images into a PDF in a few clicks:

1. Open Preview
2. Choose File > New from Clipboard or open the first image
3. Drag the other images into the sidebar (the thumbnails panel) in the order you want
4. You can also File > Print the selection and choose Save as PDF in the print dialog
5. File > Save to write the PDF

A faster path: select all the images in Finder, right-click, choose Quick Actions > Create PDF. macOS will assemble them into a single PDF in alphabetical order. You can then drag the pages around in Preview to reorder.

Preview is Mac only and free. It is fast for small batches, but it does not let you choose a different page size per image — every image gets the same A4 or Letter page, which is fine for documents but adds whitespace to photos.

Method 3: Command line with img2pdf

If you are comfortable in a terminal, the open-source tool img2pdf is the most flexible CLI option. It is a small Python tool that wraps images into a PDF without re-encoding them, which means zero quality loss and smaller file sizes than converting to PDF via a print-to-PDF pipeline.

Install it with `pip install img2pdf` (or `brew install img2pdf` on macOS), then:

```bash # Combine all images in a folder into a single PDF (alphabetical order) img2pdf *.jpg --output out.pdf

# Combine specific images in a specific order img2pdf page1.jpg page2.jpg page3.jpg --output out.pdf

# Set page size to A4 and orientation to landscape img2pdf --pagesize A4 --landscape *.jpg --output out.pdf

# Fit each image exactly, no margins, no rescaling img2pdf --fit img --no-imgsize img1.jpg img2.jpg --output out.pdf ```

The `img2pdf` tool is fast, scriptable, and unbeatable for batch processing hundreds of images. The alternative tool, ImageMagick (`convert img1.jpg img2.jpg out.pdf`) re-encodes every image as JPEG, which can introduce quality loss. img2pdf embeds the original images as-is.

Common questions

What image formats are supported?

UtilBoxx supports JPG, PNG, and WebP. `img2pdf` supports the same plus a few more (TIFF, PPM). If you need to convert HEIC photos from an iPhone, run them through a HEIC-to-JPG converter first, then drop the JPGs into the tool.

Will the PDF have one page per image, or all on one page?

One page per image. Each image you add becomes its own page in the PDF, in the order you arrange them. This is the standard for photo albums and scanned documents.

Can I reorder the images after adding them?

Yes. In UtilBoxx's Image to PDF tool, drag the thumbnails into the order you want. In `img2pdf`, list the files in the order you want them to appear. In macOS Preview, drag the page thumbnails in the sidebar to reorder.

Will the image quality be preserved?

Yes. UtilBoxx embeds the images at full resolution. `img2pdf` is the same: it wraps the original image bytes into the PDF container without re-encoding. The only tool that re-encodes is ImageMagick's `convert`, which can introduce JPEG artifacts — avoid that path for high-quality output.

What page size should I pick?

• A4 (210 × 297 mm): International standard, used everywhere except the US and Canada.
• Letter (8.5 × 11 in): US and Canadian standard.
• Fit to image: Each image becomes its own page sized exactly to the image. No margins, no whitespace. Ideal for photos.

For documents (receipts, scanned pages), use A4 or Letter. For photo albums, "Fit to image" is usually the best choice.

Is it safe to use an online image-to-PDF converter?

It depends on the service. UtilBoxx processes everything in your browser — no upload, no server-side processing, no logs. With other tools, assume your file is being uploaded to a remote server and read their privacy policy carefully. Avoid uploading photos of personal, financial, medical, or legally sensitive information to a converter you do not trust.

What is the difference between combining images as PDF pages and stitching them into a single image?

Combining as PDF pages is the right approach for photo albums, scanned documents, and any case where you want each image to be a separate, separately-viewable page. Stitching into a single image is better for grid-style montages and comparison shots. Most people want the former.

Conclusion

Combining images into a PDF is a small task that comes up constantly — and should not require a paid subscription or a software install. For most people, UtilBoxx's free Image to PDF tool is the obvious choice: it is private, fast, free, supports JPG/PNG/WebP, and works in your browser.

If you are on a Mac, Preview's Quick Actions do this in two clicks. If you are scripting batch work, img2pdf in the terminal is unbeatable.

For everything else, head to UtilBoxx PDF tools and you will find a complete, privacy-first toolkit for working with PDFs — all in your browser.