Why Convert Images to PDF?
Images are great for viewing, but they're not ideal for sharing as documents. Sending five separate JPEG files to someone is awkward — they have to manage multiple attachments, can't print them easily as a set, and can't easily read them in a consistent document format. Converting images to a single PDF solves all of this.
Common reasons to convert images to PDF:
- Combine scanned pages: You scanned a multi-page document as individual images — combine them into one PDF for easy reading and sharing.
- Create a photo album: Put multiple photos into a single shareable PDF file.
- Submit documents: Many portals (government, insurance, banking) accept PDFs but not raw image files.
- Send receipts or invoices: Combine photos of multiple receipts into one organized PDF for expense reports.
- Prepare printable content: PDFs are more predictable to print than image files, especially for multi-page sets.
- Portfolio or lookbook: Combine images of your work into a single professional PDF to send to clients.
Which Image Formats Are Supported?
duckdodoc's Image to PDF tool accepts:
- JPG / JPEG — the most common photo format
- PNG — for screenshots, graphics, and images with transparent backgrounds
- WebP — modern web format
You can mix and match formats in the same PDF — upload a combination of JPGs and PNGs and they'll all appear in the output document.
How to Convert Images to PDF on duckdodoc
- Open the Image to PDF tool. Go to the Image to PDF page.
- Upload your images. Select one or multiple image files. You can drag and drop several files at once.
- Arrange the order. The images will appear in the PDF in the order you upload them. If you need a specific order, upload them in that sequence.
- Click Run. Each image becomes one page in the PDF.
- Download your PDF. A single PDF file containing all your images is ready to download.
Tips for Better Image-to-PDF Results
Tip: If you're combining scanned document pages, make sure all images have a consistent orientation before uploading. Use the Crop tool to standardize them first.
- Compress large images first: If your images are high-resolution photos, the resulting PDF may be very large. Run them through the Compress Image tool first, or compress the final PDF with the Compress PDF tool.
- Consistent image sizes: If all your images are the same dimensions (e.g., all A4 scans), the PDF pages will be uniform. Mixed sizes produce a PDF with differently-sized pages, which can look inconsistent when printed.
- PNG transparency: PNG images with transparent backgrounds will have a white background in the PDF, since PDF pages cannot be transparent.
- Merge with existing PDFs: After converting images to PDF, you can use the Merge PDF tool to combine your new PDF with other existing PDFs.
Frequently Asked Questions
How many images can I combine into one PDF?
There's no hard limit on the number of images. The total upload size across all files must be under 100 MB. For very large batches, consider splitting the job into multiple PDFs and then merging them.
Will the image quality be preserved in the PDF?
Yes. Images are embedded at their original quality in the PDF output — no additional compression is applied during conversion. The resulting PDF will be sharp and clear.
Can I control the page size (A4, Letter, etc.)?
The PDF pages are sized to match each image's dimensions by default. If you need a specific page size (like A4), resize your images to the correct dimensions first using the Resize Image tool.
Is this tool free?
Yes. Converting images to PDF on duckdodoc is completely free, with no account required and no watermarks on the output.
Can I do this on a mobile device?
Yes. duckdodoc works on any device with a modern browser. You can upload images directly from your phone's camera roll and download the resulting PDF, all without installing any app.