When to combine images into a PDF
Sharing many separate photos by email is noisy; one PDF keeps the sequence and opens on any device. Freelancers merge receipts; teachers bundle worksheet scans. The important part is order: our thumbnail list is drag-sortable so page 1 in the PDF is exactly the order you set before clicking Create PDF.
Default download is images-combined.pdf. You can rename the file after saving. For the reverse
workflow — extracting pages as images — use PDF to JPG.
How each image format is handled
| Format | In the PDF |
|---|---|
| JPG / JPEG | Embedded directly as JPEG |
| PNG | Embedded as PNG; transparency flattened on white |
| HEIC / HEIF | Converted to JPEG in-browser (heic2any), then embedded |
| WebP, GIF, BMP | Decoded to pixels, written as JPEG inside the PDF; animated GIF uses first frame only |
Wide panoramas scale to fit the selected paper size (A4, Letter, or Legal) while keeping aspect ratio — the page orientation (portrait vs landscape) follows whether each image is wider or taller than tall.
Privacy and offline use
Processing uses pdf-lib and your browser’s canvas — nothing is sent to DoItSwift. After the page loads, you can disconnect from the internet and still build PDFs from local images. For more on keeping PDF work private, read how to compress a PDF (browser-based tools vs upload sites).