How to use Image to PDF
Convert images (JPG, PNG, WebP, BMP) to a PDF document entirely in your browser. Multiple images become multiple pages in a single PDF. Choose page size (A4, Letter, original image dimensions) and orientation. Perfect for creating photo albums, submitting scanned documents, or packaging image assets for sharing.
- Upload one or more images using the file picker or drag-and-drop.
- Reorder the images to set the page sequence.
- Select page size (A4, Letter, or "match image" for exact pixel dimensions).
- Choose portrait or landscape orientation.
- Click "Convert to PDF" and download the resulting document.
Your data never leaves your device — 100% private processing.
Page layout and image fitting
"Fit to page" scales the image to fill the chosen page size (e.g., A4) while maintaining aspect ratio, with white margins on the shorter sides. "Fill page" scales and crops the image to completely fill the page with no margins, which may crop the edges. "Original size" creates a PDF page exactly matching the pixel dimensions of each image, resulting in variable page sizes but perfect pixel-level reproduction. For submitting photo documentation or scanned forms, "Fit to page" on A4 or Letter is the standard choice.
Quality vs. file size considerations
Images are embedded in the PDF at their original resolution with no downsampling during conversion. For print-quality PDFs, use source images at 300 DPI or higher. For digital sharing, 96–150 DPI is sufficient. The resulting PDF file size is approximately equal to the sum of all input image file sizes plus a small overhead (~5 KB) for PDF metadata. To reduce PDF file size after conversion, use the PDF Compress tool to re-encode embedded images at a lower quality setting.
Worked examples
Multi-page document
Inputs: 5 photos, one image per page
Result: 5-page PDF
Single scan to PDF
Inputs: 1 JPEG scan, fit to A4
Result: 1-page A4 PDF
Standard PDF page sizes
| Size | Millimetres | Inches |
|---|---|---|
| A4 | 210 × 297 mm | 8.27 × 11.69 in |
| Letter | 216 × 279 mm | 8.5 × 11 in |
| Legal | 216 × 356 mm | 8.5 × 14 in |
| A3 | 297 × 420 mm | 11.69 × 16.54 in |
Glossary
- PDF embedding
- The process of storing image data as an inline object within the PDF file structure.
- A4
- The ISO 216 standard paper size (210 × 297 mm / 8.27 × 11.69 inches) used in most countries.
- Letter
- The standard paper size in the United States and Canada (8.5 × 11 inches / 215.9 × 279.4 mm).
- DPI
- Dots per inch — the print resolution of an image. 300 DPI is standard for quality printing; 96 DPI is standard for screen display.
Related reading
Frequently Asked Questions
Why use Image to PDF?
- Combine multiple images into a single multi-page PDF document for easy sharing
- Choose A4, Letter, or image-matched page size to meet the recipient's format expectations
- Drag-to-reorder images before generating the PDF so page sequence is right first time
- Convert scanned document photos to a standard PDF without installing desktop software
Common use cases
- Bundle photos of signed contract pages into a single PDF to email to a solicitor
- Convert whiteboard photos from a meeting into an A4 PDF for archiving in a shared drive
- Submit scanned ID documents as one PDF when an online form accepts only a single attachment
- Turn a sequence of product mockup images into a client presentation PDF
- Package multiple invoice scan photos into one PDF to attach to an expense report
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