Whether you are scanning documents with your phone, compiling photo evidence, sending product photos to a client, or submitting multiple images as a single file attachment, combining images into one PDF is something that comes up constantly. Here is the quickest way to do it, for free, on any device.
How to combine images into a PDF
Filero's Image to PDF tool converts multiple images into a single multi-page PDF entirely in your browser. No files are uploaded to a server.
- Open the Image to PDF tool.
- Click "Upload Images" or drag multiple image files onto the page. You can add JPG, PNG, WebP, BMP, and other common formats.
- Drag the thumbnails to reorder the pages if needed — the order you see is the order they will appear in the PDF.
- Click Convert to PDF.
- Download your multi-page PDF with all images combined.
Each image becomes one page in the PDF. The tool scales each image to fit an A4 page while preserving the aspect ratio, so portrait and landscape images are both handled correctly.
Common use cases
- Scanned documents. If you have scanned a multi-page document one page at a time using a phone scanner app, you will end up with a folder of individual JPGs. Combining them into a single PDF makes the document easy to email and keep organised.
- Photo portfolios. Designers, photographers, and architects frequently need to compile a set of images into a PDF portfolio to email to a client or attach to a job application.
- Insurance or legal claims. Many forms require supporting photographs. Combining them into one PDF is tidier than attaching five separate image files.
- Receipts and invoices. Combine photos of physical receipts into a single expense PDF for submission.
- Real estate listings. Property photos are often collected and shared as a PDF brochure.
What image formats are supported?
The Image to PDF tool accepts the most common image formats: JPG, JPEG, PNG, WebP, BMP, GIF, and TIFF. If your images are in HEIC format (common on iPhones), convert them to JPG first using Filero's HEIC to JPG converter, then combine them into a PDF.
How to combine images into a PDF on iPhone
iPhones have a built-in shortcut in the Files app that many people miss. To combine images already in your Files app:
- Open the Files app and navigate to the folder containing your images.
- Tap the three-dot menu in the top right and select "Select".
- Tap each image you want to include.
- Tap the three-dot menu at the bottom and select "Create PDF".
For more control over ordering and page size, the browser-based tool works well on iPhone too — open it in Safari, upload from your Photos or Files app, reorder as needed, and download the result.
How to combine images into a PDF on Mac
On a Mac, Preview can combine images into a PDF without any additional software:
- Select all the images in Finder (hold Cmd and click each one).
- Right-click and choose "Open With → Preview".
- In Preview, make sure the sidebar is showing (View → Thumbnails).
- Drag the thumbnails in the sidebar to reorder pages.
- Go to File → Export as PDF and save.
Tips for better results
- Straighten your images before combining. Scanned pages that are slightly crooked look unprofessional in a PDF. Most phone scanner apps have auto-straighten features worth using before export.
- Compress the PDF if it is too large to email. High-resolution photos produce large PDFs. Run the finished file through Filero's Compress PDF tool to reduce the size before sending.
- Check the page order before downloading. It is much easier to reorder pages before conversion than to split and merge afterwards.
Frequently asked questions
Is there a limit to how many images I can combine?
Filero's Image to PDF tool is client-side and has no hard limit. In practice, combining more than 50 to 100 large images in one go may be slow in the browser. For very large batches, consider splitting them into groups and then merging the resulting PDFs.
Can I combine images and PDF pages into one document?
Not directly in the Image to PDF tool, which is for images only. The best approach is to convert your images to a PDF first, then use the Merge PDF tool to combine that PDF with any other PDF pages you want to include.
Will the image quality be reduced in the PDF?
The browser-based tool preserves the original image quality. If you later run the PDF through the Compress PDF tool, you can choose how much to reduce image quality — the Balanced preset (150 DPI) is fine for screen and email use, while High quality (300 DPI) is suitable for printing.
Ready to try it?
Use Filero's free Image to PDF tool. No account needed, works on any device.
Open Image to PDF