Images to PDF
Convert multiple images into a single PDF document. Drag to reorder, choose page size and orientation, preview the result, and download. All processing in your browser.
How it works
Features
What Is Images to PDF Conversion?
Images to PDF conversion is the process of combining one or more image files into a single, portable PDF document. This is essential for anyone who needs to share multiple images as one cohesive file, whether for professional presentations, academic submissions, or personal archiving. Unlike sending a folder of loose images, a PDF preserves page order, maintains consistent formatting across devices, and is universally viewable without specialized software.
Our free online images to PDF converter processes everything directly in your browser using the pdf-lib JavaScript library. Your images never leave your device, making it safe for sensitive documents like medical records, legal contracts, or personal identification. The tool supports drag-and-drop reordering, multiple page sizes, custom margins, and a full PDF preview before download.
How to Convert Images to PDF
Follow these steps to convert your images into a professional PDF document:
- Upload your images - Drag and drop files onto the upload area, or click to browse your device. You can add PNG, JPG, WebP, GIF, and BMP files. The total size limit is 100 MB.
- Arrange page order - Each image becomes one page. Drag thumbnails to reorder them into your preferred sequence. Remove unwanted images by clicking the X button on hover.
- Configure settings - Select page size (Fit to Image, A4, Letter, or A3), orientation (Auto, Portrait, or Landscape), and margin size. "Fit to Image" creates pages that match each image's exact dimensions.
- Generate the PDF - Click "Create PDF" or press Ctrl+Enter. The progress bar shows conversion status as each image is embedded into the document.
- Preview and download - Review the scrollable PDF preview to verify layout. Edit the filename if needed, then click "Download PDF" or press Ctrl+D to save.
Key Features
- Drag-and-drop reordering - Rearrange pages by dragging image thumbnails. The numbering updates automatically so you always know the final page sequence.
- Multiple page sizes - Choose Fit to Image (preserves original dimensions), A4 (210 x 297 mm), Letter (8.5 x 11 in), or A3 (297 x 420 mm). Images are automatically scaled and centered within the chosen page.
- Smart orientation - Auto mode detects whether each image is landscape or portrait and rotates the page accordingly. You can also force a single orientation for all pages.
- Full PDF preview - View every page rendered in a scrollable preview before downloading. No surprises after saving.
- Keyboard shortcuts - Press Ctrl+Enter to create the PDF and Ctrl+D to download. Power users can work without touching the mouse.
- Processing statistics - After conversion, see page count, page size, total file size, and processing time at a glance.
- 100% private - All conversion happens client-side using pdf-lib. No server uploads, no data collection, works offline after page load.
Supported Image Formats
The converter accepts all common image formats. Here is how each is handled internally:
| Format | Extension | Embedding Method |
|---|---|---|
| JPEG | .jpg, .jpeg | Direct embed (smallest PDF size) |
| PNG | .png | Direct embed (preserves transparency) |
| WebP | .webp | Canvas conversion to PNG |
| GIF | .gif | Canvas conversion (first frame) |
| BMP | .bmp | Canvas conversion to PNG |
Common Use Cases
Academic submissions - Students combine handwritten assignment pages, lecture slides, or lab photos into a single PDF for upload to learning management systems that only accept PDF format.
Document scanning - After photographing multi-page documents (contracts, receipts, medical forms), merge the photos into one organized PDF. Use "Fit to Image" mode to preserve the original proportions of each scan.
Photography portfolios - Photographers and designers create quick PDF portfolios from a curated set of images. A4 or Letter size with medium margins produces clean, printable results that look professional when shared with clients.
Tips and Tricks
- Use JPG for smaller PDFs - JPEG images embed directly without conversion, producing significantly smaller PDF files than PNG. If file size matters, convert your PNGs to JPG first using our Image Converter.
- Fit to Image for scans - When converting scanned documents, use "Fit to Image" page size with no margin. This preserves the exact dimensions and avoids white borders that waste space.
- A4 for printing - If you plan to print the PDF, select A4 or Letter with medium margins. The tool automatically scales and centers each image within the printable area.
- Batch large sets - The tool handles hundreds of images, but for very large batches (100+), use JPG format to keep memory usage manageable. The thumbnail grid caps at 40 previews but all images are included in the final PDF.
- Reorder before converting - Take time to arrange pages correctly before clicking Create PDF. It is faster than regenerating the entire document after noticing a page is out of order.
Frequently Asked Questions
Is there a file size limit?
Yes, the total combined size of all images is limited to 100 MB. This is a browser memory constraint. For most use cases (scanned documents, photos, screenshots), this is more than sufficient. If you hit the limit, try compressing your images first using our Image Compressor.
Are my images uploaded to any server?
No. All processing happens entirely in your browser using the pdf-lib JavaScript library. Your images never leave your device, and the tool works even without an internet connection after the page loads. This makes it safe for confidential documents like IDs, medical records, or contracts.
What image formats are supported?
The tool accepts PNG, JPG/JPEG, WebP, GIF, and BMP files. PNG and JPG are embedded directly into the PDF for maximum quality. Other formats (WebP, GIF, BMP) are automatically converted to PNG via an internal canvas before embedding.
What does "Fit to Image" page size mean?
When you select "Fit to Image", each PDF page is sized to match the dimensions of that particular image plus your chosen margin. A 1920x1080 photo gets a different page size than a 3000x4000 portrait shot. This is ideal when you want zero whitespace and maximum image quality, such as for scanned documents.
Can I rearrange pages after adding images?
Yes. After adding images, each one appears as a numbered thumbnail in a grid. Drag any thumbnail to a new position to reorder pages. You can also remove individual images by hovering and clicking the X button, or add more images at any time using the "+ Add More" button.
How do I convert the PDF back to images?
Use our PDF to Images tool. It extracts each page as a high-quality PNG or JPG with adjustable DPI settings. You can select specific pages or convert the entire document at once.
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Conclusion
This free images to PDF converter gives you complete control over how your images become a PDF document. With drag-and-drop reordering, multiple page size options, smart orientation detection, and a full preview before download, you can create professional-quality PDFs in seconds. Everything runs in your browser, so your files stay private and the tool works even offline. Try it now with your images, or explore our other free online tools for more file conversion needs.