OptiPix
Guides4 min read

Image to PDF Conversion: Complete Guide for Documents and Photos

Converting images to PDF is common for creating documents, portfolios, and archival copies. Here's how to do it right.

Page Size Selection

  • A4 (210×297mm): International standard, most common
  • Letter (8.5×11"): US standard
  • A3 (297×420mm): Large format printing
  • Orientation Tips

  • Portrait: Best for vertical images, documents, and text pages
  • Landscape: Best for horizontal images and presentations
  • Margin Settings

  • No margin: Full-bleed images
  • 10-15mm: Standard document margins
  • 20-25mm: Book-style margins for printing
  • Image Quality Considerations

  • Use PNG for documents with text (lossless quality)
  • Use JPEG for photo albums (smaller file size)
  • Ensure sufficient resolution for printing (300 DPI)
  • Convert images to PDF instantly with our Image to PDF tool — supports multi-page documents with custom layouts.

    Large source photos? Run them through our Image Compressor first to keep the final PDF small without sacrificing visual quality.

    Try Image Compressor free — your files never leave your device

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