Advanced Tips

How to Merge Multiple Images Into a Single PDF

📅 April 4, 2026 ⏱ 4 min read ✍️ BuildPDF Team

Need to combine a stack of photos, scanned pages, or screenshots into a single organized PDF document? BuildPDF makes this effortless — just select all your images at once, order them, and convert. Each image becomes one page in the final PDF.

This works with JPG, PNG, WEBP, GIF, and BMP files — and it's completely free, with no watermarks and no file uploads.

Step-by-Step: Merge Images into One PDF

Go to BuildPDF

Open buildpdf.co — works on any device with a modern browser.

Select all your image files

Click "Choose Files" and select multiple images at once (hold Ctrl or Cmd to multi-select), or drag and drop a batch of images onto the drop zone together. You can mix JPG, PNG, WEBP, and other formats freely.

Check the file order

The files will appear in a list. They will be converted in the order shown — which is typically the order you selected them. Make sure the order matches the page order you want in the final PDF.

Set your PDF options

Choose page size and orientation. For portrait photos, use Portrait. For landscape/widescreen images, use Landscape. Set Image Quality to High for best results.

Click "Convert to PDF" and download

All images are merged into a single multi-page PDF and generated in your browser. Download it instantly.

💡 Ordering Tip: To ensure your images appear in the right order, rename them with a sequential number prefix before selecting: 001_page.jpg, 002_page.jpg, 003_page.jpg. When you select them all, they'll be ordered numerically.

Real-World Use Cases

📸Photo albums — Collect a series of event or vacation photos and bundle them into a single shareable or printable PDF album.
📄Scanned documents — Scan each page of a form, contract, or book as a separate image and merge them into one PDF document.
🖥UI/UX walkthroughs — Combine a sequence of app screenshots into a PDF presentation for clients or stakeholders.
🏠Real estate portfolios — Package property photos into a single PDF listing document.
📋Insurance claims — Compile damage photos or receipts into a single organized PDF for submission.
🎓Student submissions — Merge handwritten assignment pages (photographed) into a single PDF to submit online.

Choosing the Right Settings for Image Merges

Page size

If all your images are the same orientation and aspect ratio, choose the page size that matches best. For photos taken on a smartphone (portrait), A4 Portrait works well. For landscape photos, A4 Landscape or Letter Landscape fills more of the page.

Margins

For photo PDFs or portfolios, None (0mm) margin gives a full-bleed edge-to-edge look. For document scans that should look like real pages, use Normal (10mm) margins for a more professional appearance.

Image quality

High (95%) — Use for photos or images meant for printing or archiving.
Medium (80%) — Use for digital sharing where you want smaller file sizes (e.g., email attachments).
Low (60%) — Use for preview PDFs or quick sharing where quality doesn't matter much.

Mixed orientations

Currently, BuildPDF applies a single orientation setting to all pages. If you're merging a mix of portrait and landscape images, choose the orientation that fits the majority of your images. For professional mixed-orientation work, a desktop tool like Adobe Acrobat gives more per-page control.

How Many Images Can I Merge?

There's no hard limit set by BuildPDF — you can merge as many images as your browser can handle in memory. In practice, merging 50–200 images works well in most modern browsers on a standard laptop. Very large batches (500+ high-resolution images) may be slow or may exhaust browser memory; for those, consider splitting into two conversions.

Merge your images into a PDF now

Free, unlimited, no watermarks. Files stay on your device.

Start Merging Images →