Productivity & Documents5 min read
How to Convert and Merge Multiple Images into a High-Resolution PDF
A comprehensive tutorial on combining JPG, PNG, and WebP photos into single or multi-page PDF documents with custom paper sizes, margins, and orientation.
# How to Convert and Merge Multiple Images into a High-Resolution PDF
Combining receipts, scanned contracts, assignment sheets, certificates, or photo portfolios into a single clean PDF document is a daily requirement for students, freelancers, and businesses.
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## 1. Key Configuration Settings for Image-to-PDF Conversion
When compiling visual assets into a PDF, configure the following options:
* **Page Dimensions**: Select **A4** (International standard, $210 \times 297$ mm) or **US Letter** ($8.5 \times 11$ inches) depending on your region.
* **Page Orientation**: Use **Portrait** for documents and certificates, or **Landscape** for panoramic photos and wide spreadsheets.
* **Margin Spacing**: Apply clean margin borders (e.g. 10mm–15mm) to ensure content is never clipped when physically printed.
* **Image Scaling (Fit vs Fill)**: Choose **Fit (Contain)** to preserve full image aspect ratios without cropping any edges.
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## 2. Converting Multiple Photos to PDF in Lumino
1. Open the [Lumino Image to PDF Converter](/en/image-to-pdf).
2. Drag and drop multiple photos into the upload studio.
3. Drag thumbnail cards to re-order the pages in your desired sequence.
4. Select your preferred Page Size, Orientation, and Margin padding.
5. Click **Generate & Download PDF Document**.