How to Merge Multiple Images into One PDF (Free & Easy)

Merging multiple images into a single PDF is one of the most common document tasks — whether you are compiling scanned pages, combining product photos, or building a portfolio. Here is the fastest, easiest way to combine multiple images into one PDFwithout installing any software.

When Do You Need to Merge Images into a PDF?

Common scenarios where you need to combine multiple images into one PDF:

• Scanned documents: You scanned a multi-page contract page by page — now you need them as one file
• Student assignments: Your handwritten homework is spread across 6 phone photos
• Real estate listings: 20 property photos need to become a single presentation PDF
• Portfolio submissions: Your artwork or design work across multiple image files
• Business reports: Charts and diagrams saved as separate images need consolidating

How to Merge Multiple Images into One PDF (Step by Step)

Using ConvertToPDF.online, you can merge up to 50 images into a single PDF in under 30 seconds:

1. Open the tool: Go to converttopdf.online/jpg-to-pdf
2. Upload all images at once: Drag and drop all your files onto the upload zone simultaneously, or click "Choose Files" and select multiple files using Ctrl+click (Windows) or Cmd+click (Mac)
3. Reorder the pages: Drag image thumbnails to arrange them in the exact order you want in the final PDF. Each thumbnail represents one page.
4. Select a page size: Choose A4 for standard documents, Letter for US format, or "Fit to Image" to match each image's original dimensions
5. Convert and download: Click "Convert to PDF" — your merged PDF is ready to download in seconds

The tool works entirely in your browser. Your images are never uploaded to any server, making it safe for sensitive documents, ID scans, and confidential materials.

Merging JPG and PNG Images Together

You can mix JPG and PNG files in the same merge — the tool handles both formats simultaneously. This is useful when you have a mix of photographs (usually JPG) and screenshots or diagrams (usually PNG) that need to go into the same document.

If you only have PNG files, you can also use our dedicated PNG to PDF converter, which works identically and is optimized for PNG-specific use cases like screenshots and graphics.

How to Change Page Order Before Converting

Getting the page order right is critical for scanned documents. Our tool shows each uploaded image as a draggable thumbnail. Simply click and drag any thumbnail to a new position. The numbers on each thumbnail update in real-time to show the final page sequence.

There is no limit to how many times you can reorder — rearrange as many times as you need before clicking Convert.

What Are the Best Image Formats for PDF Merging?

Both JPG and PNG work well, but they have different strengths:

• JPG: Best for photographs. Smaller file sizes. Some quality loss from original compression, but no additional loss during PDF conversion.
• PNG: Best for screenshots, diagrams, and images with text. Lossless compression means perfect quality, but larger file sizes.

For a mixed document with both photos and screenshots, use JPG for photos and PNG for anything with text or sharp lines to get the best quality-to-size ratio.