If you need to send scanned receipts, phone photos, or screenshots as one document, converting multiple images into a single PDF is the standard approach on Windows 10. Many people start by right-clicking a JPG or PNG and looking for a "Convert to PDF" option that simply is not there. The Photos app opens the file but does not offer a clear way to merge several pictures into one PDF. This guide walks through three offline methods that actually work — from Windows built-ins to a fast command-line tool, to a dedicated desktop app for regular batch jobs.
Method 1: Microsoft Print to PDF (built into Windows 10)
Windows 10 includes a virtual printer called Microsoft Print to PDF. It is free, needs no extra install, works offline, and is fine when you only have a few images.
- Open your first image in Photos (or another viewer).
- Press Ctrl+P to print.
- Choose Microsoft Print to PDF as the printer.
- Save the output.
- Repeat for each image if you want separate PDFs.
To combine multiple pictures into one file using only built-in tools:
- Open Microsoft Word.
- Insert each image on its own page (Insert → Pictures).
- Use File → Save As → PDF.
This approach is slow for large batches and manual ordering is tedious, but it requires no third-party software and is enough for occasional one-off tasks.
Method 2: img2pdf (command line — best for technical users)
For bulk conversion without a graphical interface, img2pdf is a lightweight free tool that runs offline. It runs in Command Prompt or PowerShell and supports JPG, PNG, TIFF, and other common formats. After installing img2pdf, open a terminal in the folder that contains your images.
-
Single image:
img2pdf image.jpg -o output.pdf -
Several named files:
img2pdf image1.jpg image2.png -o output.pdf -
All JPGs in a folder:
img2pdf *.jpg -o output.pdf -
A4 page size:
img2pdf image.jpg --pagesize A4 -o output.pdf
A major advantage is that JPEG images are often embedded without re-encoding, which helps preserve quality and keep file size reasonable. The trade-off is that command-line tools are not beginner-friendly — you must be comfortable with terminals, paths, and typing commands correctly. If you prefer clicking through a visual app, use Method 1 or Method 3 instead.
Method 3: Bulk Image to PDF Converter (Microsoft Store — recommended for regular use)
If you convert image batches often and want a simple desktop workflow, Bulk Image to PDF Converter by BitBotBoo Solutions (published as BBB Solutions on the Microsoft Store) is built for exactly this job. Unlike online converters, it works fully offline on Windows 10 version 17763 or later — your files stay on your PC, which matters for invoices, IDs, and other sensitive scans.
- Install the app from the Microsoft Store.
- Add your JPG or PNG files to the list.
- Reorder images, remove individual items, or clear the list before converting.
- Choose a page layout: Original Size, Fit to A4 Page, or Multiple Images on A4 (you choose how many pictures per page).
- Click convert to merge everything into a single PDF.
The free version includes all layout options with a limit of 10 images per conversion; the Pro version removes that cap for large projects. This is the most practical option when you need speed, privacy, and control over page layout without using the command line.
Which method should you choose?
- Microsoft Print to PDF or Word — best when you rarely convert one or two images and want zero extra installs.
- img2pdf — best when you are comfortable with PowerShell and want a scriptable, quality-preserving batch process.
- Bulk Image to PDF Converter — best when you want a modern Windows app with drag-and-drop ordering, offline privacy, and flexible page layouts for homework scans, expense reports, photo albums, or larger batches.
All three approaches work offline and produce a standard PDF you can email, upload, or print. Pick the one that matches how often you do this task and how much manual work you are willing to accept.