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How to Combine Multiple Images Into One PDF

Turn JPG and PNG photos, screenshots, or scans into one multi-page PDF. Free browser converter with page sizing, margins, and no file upload to any server.

By ToolSite6 min readguides

When to Combine Images into a PDF

You photographed a multi-page document with your phone and need to send it as one file. You have screenshots of a web flow to share with a client. Receipts for an expense report are individual JPEGs and accounting requires a single PDF upload. A series of diagrams needs to be bundled into a presentation handout. Scanned pages from a book need to become one searchable document.

Combining images into a PDF places each image on its own page in a single document. The result is shareable, printable, and professional. It is far better than attaching 15 separate image files to an email and hoping the recipient opens them in the right order.

How the Image to PDF Tool Works

The Images to PDF Converter creates a PDF from images in a few steps:

  1. Upload images: select the JPG or PNG files in the order you want them to appear as pages. Drag to reorder in the upload list.
  2. Choose page size: pick from preset sizes (A4, Letter, Legal), fit each page to its image dimensions, or specify a custom size.
  3. Set orientation: portrait for tall images, landscape for wide images, or auto-detect based on each image's aspect ratio.
  4. Adjust margins: optionally add white space around images. Default is no margins with the image filling the page area.
  5. Convert and download: the tool creates a PDF with one page per image and triggers a download.

All processing runs locally in your browser. Images are never uploaded to a server.

Page Layout Options

The tool offers three page sizing approaches. Which one you pick depends on how the PDF will be used.

Fit to Image

Each PDF page is exactly the dimensions of the image. A 1920 × 1080 screenshot produces a widescreen page at those exact dimensions. An iPhone photo at 4032 × 3024 produces a page with those proportions.

Use this when:

  • You are sharing screenshots and want them at full fidelity.
  • Page size does not need to match a print standard.
  • The recipient will view the PDF on a screen, not print it.

Standard Paper Sizes (A4, Letter)

All pages are set to a standard document size. Each image is scaled to fit within the page margins while preserving its aspect ratio. The image is centered horizontally and vertically.

Use this when:

  • The PDF will be printed.
  • You are submitting to a system that expects standard page sizes.
  • You want a uniform, professional look across all pages.

Custom Page Size

Enter exact page dimensions in millimeters or inches. Useful when the recipient requires a specific non-standard page size or when you are creating a PDF for a template with fixed dimensions.

Image Ordering and Rotation

The order of images in the upload list determines the page order in the PDF. The first image becomes page 1, the second becomes page 2, and so on. Drag images up or down to reorder before converting.

If an image is in the wrong orientation (a portrait photo that appears sideways), fix it before uploading. Use the Image Rotate Tool to correct orientation, save the rotated version, then add it to the PDF converter.

Managing File Size

A PDF made from 10 JPEG photos at 2 MB each could produce a 20 MB PDF. Many email providers cap attachments at 25 MB. Large PDFs are also slow to open on mobile devices.

Before combining images:

  • Compress individual images: use the Image Compressor to shrink photos before adding them to the PDF. A 2 MB photo can often compress to 200 KB with no visible quality loss at screen size.
  • Resize to reasonable dimensions: 1200 to 1500 pixels on the long edge is enough for screen viewing. A phone photo at 4032 pixels is far beyond what any screen needs. Use the Image Resizer to downsize.
  • Compress the finished PDF: after creating the PDF, run it through the PDF Compressor to further reduce the total file size.

Supported Image Formats

JPEG and PNG are universally supported and are the recommended input formats.

Other formats need conversion first:

  • WebP: convert to JPEG or PNG with the Image Converter. Not all PDF viewers handle WebP-embedded documents correctly.
  • HEIC/HEIF: iPhone photos in HEIC format need conversion to JPEG first. Most browsers cannot read HEIC directly.
  • SVG: convert vector SVGs to PNG with the SVG to PNG Converter at the desired resolution before adding to the PDF.
  • BMP, TIFF: convert to JPEG or PNG first.

Common Use Cases

Scanned Documents

Photograph multi-page documents with your phone, convert each photo to JPEG (compress first to manage file size), then combine into a single PDF. The result looks like a scan and is suitable for email, upload, or archive.

Limit: this does not add a searchable text layer. For that, you need OCR software after creating the PDF.

Photo Collections

Bundle vacation photos, event photos, or project progress shots into one PDF per day, per location, or per topic. Choose "Fit to Image" to preserve photo dimensions, or A4 for a uniform album look.

Portfolio

Collect project screenshots and mockups into a single PDF portfolio. Add a title page image first, then project pages. Use standard A4 or Letter sizing for a professional layout suitable for sending to clients or employers.

Receipts and Expense Reports

Phone photos of receipts become a single PDF for accounting. Name the file with the date range or report period. Most accounting systems accept multi-page PDFs of receipt images.

Command-Line Alternative

ImageMagick can combine images into a PDF from the terminal:

# Combine all JPEGs in a directory into one PDF
convert *.jpg output.pdf

# Combine specific images with A4 page size
convert image1.jpg image2.jpg image3.png \
        -page A4 output.pdf

Install ImageMagick with sudo apt install imagemagick (Linux) or brew install imagemagick (macOS). On some Linux distributions, you may need to adjust the ImageMagick policy to allow PDF output.

Try it yourself: open the Images to PDF Converter. Upload 3 to 5 JPEG photos or screenshots. Set page size to A4 and orientation to auto. Click Convert and download the PDF. Open it in your PDF viewer and verify each image appears on its own page, centered and scaled to fit the A4 dimensions. Then try "Fit to Image" to see how the page dimensions change to match each image exactly.

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