What Does Converting Images to PDF Mean?
When sending scanned documents or photos of materials to someone else, organizing multiple image files into a single PDF is far more practical. PDFs display with the same layout on any device and preserve page order, making them ideal for exchanging business documents and application forms.
How to Convert Images to PDF with PDFnite
PDFnite's image-to-PDF tool works entirely in your browser. No software installation is needed, and uploaded images are never stored on a server.
- Open the Image to PDF page
- Drag and drop PNG or JPEG files, or click "Select Files" to upload (multiple files supported)
- Optionally enable "Fit to A4 size"
- Click the "Convert to PDF" button
- Download the converted PDF
When you upload multiple images, they are combined into a PDF in the order they were uploaded. If you need a specific page order, arrange your images before uploading.
Supported Image Formats
PDFnite supports the following formats:
| Format | Extension | Notes |
|---|---|---|
| PNG | .png | Supports transparent backgrounds; ideal for screenshots |
| JPEG | .jpg / .jpeg | Best for photos; smaller file size |
For other formats like BMP or TIFF, please convert to PNG or JPEG first before uploading.
Should You Enable "Fit to A4 Size"?
Enabling the "Fit to A4 size" option resizes each image to fit an A4 page, placing it with margins.
- Enable when: Creating formal documents intended for printing, official application forms
- Leave disabled when: You want to preserve the original image dimensions, or when adding screenshots or diagrams
In most cases, leaving it off is fine. Enable it only when you need the output to fit A4 paper for printing.
If you're printing and need the image to sit cleanly on A4, the gap between your image's aspect ratio and A4's 1:1.414 changes how the result looks. See our complete guide to fitting images on A4 PDF for the detailed walkthrough.
Comparison with Other Methods
macOS Preview
On a Mac, you can use the built-in Preview app to combine images into a PDF. Select multiple image files, right-click → "Open With Preview" → "File" → "Export as PDF."
- Pros: No additional software needed
- Cons: Mac only, not available on Windows
Adobe Acrobat
Adobe Acrobat's PDF creation feature can produce high-quality PDFs from images.
- Pros: Fine-grained page settings available
- Cons: Paid subscription required (from ~$14/month)
Windows Print Function
On Windows, open an image, click "Print," and select "Microsoft Print to PDF" as the printer.
- Pros: No additional software needed
- Cons: Processes only one image at a time, not suitable for batch conversions
Frequently Asked Questions
How many images can I convert at once?
PDFnite supports uploading and converting multiple images at once. The practical limit is your browser's available memory — 10 to 20 images at a time is typically fine. To combine the result with an existing PDF, use the PDF Merge tool afterwards.
Can I use photos taken on my smartphone (HEIC format)?
HEIC format (used by iPhone cameras) is not supported directly. Change your camera settings to "Most Compatible" (JPEG) in the Settings app, or convert to JPEG before uploading.
Can I edit the text in the converted PDF?
Images converted to PDF are not recognized as text, so direct text editing is not possible. If you need to edit the text, you'll need a tool with OCR (optical character recognition) capabilities.
Summary
For combining images into a PDF, PDFnite is the most convenient option — free and no installation required. Just drag and drop your images to instantly create a single PDF. Files are never sent to a server, so you can safely handle scanned documents and materials containing personal information.
If you need the output sized for A4 printing, see our complete guide to fitting images on A4 PDF as well.