How to Convert Images to PDF

Converting images to PDF format is essential for combining multiple photos or scanned documents into a single, easily shareable file. Whether you're creating a photo album, compiling receipts, organizing documents, or building a portfolio, this tool makes the process simple and secure.

Step 1: Upload Your Images

Click on the "Drop images here or click to browse" area to select the image files you want to convert to PDF.

Supported Image Formats:

• PNG - Best for documents, screenshots, graphics with transparency
• JPEG/JPG - Best for photographs and complex images
• GIF - Animated or simple graphics
• WebP - Modern web format with excellent compression
• BMP - Uncompressed bitmap images
• And more - Most standard image formats are supported

Multiple Image Selection:

• You can select multiple images at once
• Images can be from different folders
• No limit on the number of images (subject to browser memory)
• Each image becomes a separate page in the PDF

Privacy Note: All conversion happens entirely in your browser. Your images never leave your device, ensuring complete privacy and security.

Step 2: Arrange Images in Order

Once uploaded, your images appear in a preview grid. The order of images determines the page order in your PDF document.

Reordering Images

Using Arrow Buttons:

• Up Arrow (↑): Move image up one position (earlier in the PDF)
• Down Arrow (↓): Move image down one position (later in the PDF)
• The first image becomes page 1, second becomes page 2, and so on

Visual Indicators:

• Position numbers show each image's place in the sequence
• The preview grid displays images in their current order
• Disabled arrows indicate you're at the first or last position

Managing Images

Remove Unwanted Images:

• Click the X button on any image to remove it
• Removed images won't be included in the PDF
• Remaining images maintain their relative order
• You can always add more images by uploading again

Tips for Ordering:

• Start with your cover page or title image first
• Arrange documents in chronological order
• Group related images together
• Use descriptive filenames to help track content

Step 3: Choose Page Size

Select the page size that best fits your needs. The page size determines the dimensions of each page in your PDF document.

A4 (210 × 297 mm)

Description:

• International standard paper size
• Most common format worldwide
• Used in most countries except North America

Best for:

• International documents
• Academic papers
• Business documents for global use
• Printing outside North America
• Default for most PDF viewers

Dimensions:

• Width: 210 millimeters (8.27 inches)
• Height: 297 millimeters (11.69 inches)
• Aspect ratio: 1:1.414 (√2)

When to use:

• International correspondence
• ISO standard compliance required
• Printing in Europe, Asia, or other regions
• Academic submissions
• Most general purposes

Letter (8.5 × 11 inches)

Description:

• Standard paper size in the United States and Canada
• Default for most printers in North America
• Slightly wider and shorter than A4

Best for:

• US business documents
• North American correspondence
• Local printing in the US/Canada
• Standard office documents
• Faxes and forms

Dimensions:

• Width: 8.5 inches (215.9 millimeters)
• Height: 11 inches (279.4 millimeters)
• Aspect ratio: 1:1.294

When to use:

• US-based businesses
• North American audience
• Standard office printing
• Government forms (US)
• Local business correspondence

Legal (8.5 × 14 inches)

Description:

• Longer version of Letter size
• Common for legal documents in the US
• Provides extra space for lengthy content

Best for:

• Legal contracts and agreements
• Court documents
• Lengthy forms
• Contracts requiring more space
• Professional legal work

Dimensions:

• Width: 8.5 inches (215.9 millimeters)
• Height: 14 inches (355.6 millimeters)
• Aspect ratio: 1:1.647

When to use:

• Legal documents
• Contracts and agreements
• Long-form documents
• Court filings
• Professional legal correspondence

Fit to Image (Original Size)

Description:

• Each page matches the exact dimensions of its image
• No resizing or scaling applied
• Preserves original image resolution
• Each page can have different dimensions

Best for:

• Preserving image quality
• Photos and artwork
• Technical drawings
• Screenshots at original resolution
• Mixed-size documents

Behavior:

• No cropping or padding
• Original aspect ratios maintained
• Each image becomes exactly one page
• File size may be larger
• Best quality preservation

When to use:

• Photo albums and portfolios
• Artwork reproduction
• Technical diagrams at exact scale
• Screenshots and UI mockups
• When quality is paramount
• Mixed-size image collections

Step 4: Convert and Download

Once your images are ordered and you've selected a page size, you're ready to create your PDF.

Conversion Process

How to convert:

1. Review your image order in the preview grid
2. Verify your page size selection
3. Click the "Convert to PDF" button
4. Wait for the conversion to complete
   • Progress indicator shows the process
   • Larger collections take longer
   • Browser may become briefly unresponsive

What happens during conversion:

• Each image is processed individually
• Images are embedded into the PDF
• Page sizes are calculated and applied
• PDF document structure is created
• Final PDF is generated in memory

Download Your PDF

After successful conversion:

• A success message appears with download button
• Click "Download PDF" to save your file
• Default filename: images-to-pdf.pdf
• Rename immediately for better organization

File naming tips:

• Use descriptive names: 2024-receipts.pdf
• Include dates: vacation-photos-2024.pdf
• Be specific: invoice-batch-march.pdf
• Avoid special characters for compatibility

Page Size Selection Guide

Understanding Page Sizes and Image Scaling

When you select a page size (A4, Letter, Legal), your images are automatically scaled to fit within that page while maintaining their aspect ratio. Here's how it works:

Landscape Images (Wider than Tall):

• Scaled to fit page width
• Height adjusts proportionally
• May have white space above/below
• No distortion or stretching

Portrait Images (Taller than Wide):

• Scaled to fit page height
• Width adjusts proportionally
• May have white space on sides
• No distortion or stretching

Square Images:

• Scaled to fit within page
• Centered on page
• White space on sides or top/bottom
• Proportions maintained

Fit to Image Option:

• No scaling applied
• No white space added
• Each page exactly matches image size
• Best for preserving exact dimensions

Choosing the Right Page Size

Use A4 when:

• Creating international documents
• Uncertain about recipient's location
• Need ISO standard compliance
• Printing in most countries worldwide
• Most universal choice

Use Letter when:

• Recipients are in North America
• Printing on US standard printers
• Creating office documents for US market
• Working with US forms and templates
• Local business correspondence

Use Legal when:

• Creating legal contracts
• Need extra vertical space
• Working with legal templates
• Court document requirements
• Professional legal work

Use Fit to Image when:

• Image quality is critical
• Creating photo albums
• Preserving exact dimensions
• Working with technical drawings
• Mixed-size image collections
• Don't need standard page sizes

Common Use Cases

Combining Scanned Documents

Scenario: You have multiple scanned pages that need to be one PDF document.

Recommended settings:

• Page size: A4 or Letter (depending on scanner)
• Order: Sequential page order
• Format: PNG or JPEG from scanner

Tips:

• Scan all pages at same resolution
• Use consistent color/grayscale settings
• Name files with page numbers for easy ordering
• Check orientation before scanning

Creating Photo Albums

Scenario: Combine vacation or event photos into a single PDF album.

Recommended settings:

• Page size: Fit to Image (best quality)
• Order: Chronological or thematic
• Format: JPEG for photos

Tips:

• Resize large photos before conversion
• Use consistent orientation (all landscape or portrait)
• Add a title page as first image
• Consider file size for email sharing

Document Compilation

Scenario: Combine various document images into one organized PDF.

Recommended settings:

• Page size: A4 or Letter
• Order: Logical document flow
• Format: PNG for clarity

Tips:

• Create a cover page
• Use separator pages between sections
• Maintain consistent page size across scans
• Add page numbers in original images if needed

Receipt Organization

Scenario: Organize multiple receipt images for expense reports or record-keeping.

Recommended settings:

• Page size: A4 or Letter
• Order: By date or category
• Format: PNG or JPEG

Tips:

• Take clear, well-lit receipt photos
• Crop receipts before uploading
• Group by month or project
• Include summary page at beginning

Invoice Creation

Scenario: Combine invoice images or scanned pages into a professional PDF.

Recommended settings:

• Page size: A4 or Letter
• Order: Main invoice first, attachments after
• Format: PNG for text clarity

Tips:

• Start with main invoice page
• Add supporting documents after
• Include payment terms clearly
• Ensure all text is readable

Portfolio Creation

Scenario: Create a professional portfolio from artwork or design images.

Recommended settings:

• Page size: Fit to Image (preserves quality)
• Order: Best work first, thematic grouping
• Format: JPEG or PNG

Tips:

• Use high-resolution images
• Consider adding title/intro page
• Group similar work together
• Optimize image sizes for reasonable file size

Form Compilation

Scenario: Combine filled form images into single submission document.

Recommended settings:

• Page size: Letter or A4 (match original forms)
• Order: Form page order
• Format: PNG for clarity

Tips:

• Ensure forms are completely filled before scanning
• Check all pages are included
• Maintain correct page sequence
• Verify signatures are visible

Business Card Collection

Scenario: Organize business card photos into a searchable PDF.

Recommended settings:

• Page size: A4 or Letter
• Order: Alphabetical or by company
• Format: JPEG or PNG

Tips:

• Photograph cards on plain background
• 2-4 cards per page for readability
• Crop tightly around cards
• Consistent lighting across all photos

Tips and Best Practices

Image Quality Recommendations

Resolution Guidelines:

• Minimum: 72 DPI for screen viewing
• Recommended: 150-300 DPI for printing
• High Quality: 300+ DPI for professional printing
• Practical: 1920×1080px minimum for full-page images

Before Conversion:

• Use high-quality source images
• Avoid heavily compressed JPEGs
• Check image clarity before uploading
• Remove any unwanted elements

Format Selection:

• PNG for text-heavy documents (better clarity)
• JPEG for photographs (smaller file size)
• Avoid GIF for important documents
• WebP for modern, efficient compression

File Size Considerations

Factors Affecting PDF Size:

• Number of images
• Image resolution
• Image format (PNG vs JPEG)
• Image dimensions
• Page size selection

Reducing File Size:

• Compress images before uploading
• Use JPEG instead of PNG for photos
• Resize oversized images
• Use "Fit to Image" for mixed sizes
• Reduce image resolution if quality permits

Managing Large PDFs:

• Split into multiple smaller PDFs
• Compress images more aggressively
• Consider reducing color depth
• Use email attachment size limits as guide

Size Guidelines:

• Email: Keep under 10-25 MB
• Web sharing: Under 5 MB preferred
• Archival: Size less important than quality
• Printing: Balance size and resolution

Optimal Image Order

Planning Your Document:

• Create an outline before starting
• Number files for easy ordering
• Group related images together
• Consider reader's perspective

Logical Flow:

• Title/cover page first
• Introduction or overview
• Main content in sequence
• Appendices or supporting docs last
• Summary or conclusion at end

Chronological Ordering:

• Use dates in filenames
• Sort by timestamp
• Oldest to newest (or reverse)
• Group by time periods

Multi-Page Documents

Best Practices:

• Keep consistent orientation (portrait/landscape)
• Use same page size throughout
• Maintain consistent image quality
• Number pages if possible

Organization Strategies:

• Use section separators
• Add page numbers to original images
• Create table of contents page
• Include header/footer information

Professional Touch:

• Add cover page with title
• Include date and author info
• Use consistent styling
• Add contact information

Batch Processing Tips

Efficient Workflow:

• Prepare all images before starting
• Name files systematically
• Process similar documents together
• Keep originals as backup

File Naming Convention:

• Use prefixes: 01_cover.jpg, 02_intro.jpg
• Include dates: 2024-03-15_receipt.jpg
• Be descriptive: contract_page_1.jpg
• Avoid spaces: use _ or - instead

Handling Large Batches:

• Process in groups of 20-50 images
• Take breaks to avoid mistakes
• Double-check order before converting
• Save PDFs with batch identifiers

Image Format Support

PNG (Portable Network Graphics)

Characteristics:

• Lossless compression
• Supports transparency
• Best for text and graphics
• Larger file sizes

Best for:

• Scanned documents
• Screenshots
• Graphics with text
• Diagrams and charts
• Images requiring transparency
• When quality is critical

PDF Conversion:

• Embeds directly without recompression
• Maintains full quality
• Larger resulting PDF files
• No quality loss

JPEG/JPG (Joint Photographic Experts Group)

Characteristics:

• Lossy compression
• No transparency support
• Best for photographs
• Smaller file sizes

Best for:

• Photographs
• Natural images
• Complex color gradients
• When file size matters
• Photo albums
• Scanned photos

PDF Conversion:

• Embeds directly efficiently
• Good quality with smaller files
• May show compression artifacts
• Balanced size/quality ratio

GIF (Graphics Interchange Format)

Characteristics:

• Limited to 256 colors
• Supports animation (converted to static)
• Supports transparency
• Older format

Best for:

• Simple graphics
• Logos with few colors
• Legacy image files
• Basic illustrations

PDF Conversion:

• Converted to PNG internally
• Color limitations maintained
• Animation not preserved
• Basic support

WebP (Web Picture Format)

Characteristics:

• Modern format
• Superior compression
• Supports transparency
• Lossy or lossless

Best for:

• Modern web images
• Efficient storage
• High quality with small size
• Recent image downloads

PDF Conversion:

• Converted to PNG/JPEG internally
• Quality preserved
• Excellent compression
• Full support

BMP (Bitmap Image File)

Characteristics:

• Uncompressed format
• Very large file sizes
• High quality
• Windows native format

Best for:

• Uncompressed images
• Legacy files
• Maximum quality needed
• Simple format requirements

PDF Conversion:

• Converted to PNG internally
• Quality maintained
• Reduces file size in PDF
• Full support

Other Formats

TIFF, SVG, and More:

• Most standard formats supported
• Converted to PNG/JPEG as needed
• Quality preserved during conversion
• Test with your specific format

Troubleshooting

Images Appear in Wrong Order

Cause: Images were uploaded in incorrect sequence or moved incorrectly

Solution:

• Use up/down arrows to reorder images
• Remove and re-upload if needed
• Check position numbers on each card
• Review the preview grid carefully before converting
• Name files with numbers for easier ordering: 01.jpg, 02.jpg

PDF File Size Too Large

Cause: High-resolution images or many large images

Solution:

• Reduce image resolution before uploading
• Convert PNG images to JPEG for photos
• Use image compression tools before upload
• Split into multiple smaller PDFs
• Use JPEG quality reduction if acceptable
• Resize images to reasonable dimensions (1920×1080 for full page)

File Size Expectations:

• 10 photos (2MB each): ~20MB PDF
• 20 scanned pages (PNG): ~40-60MB PDF
• 50 JPEG images (500KB each): ~25MB PDF

Image Quality Issues

Cause: Low-resolution source images or inappropriate format

Solution:

• Use higher resolution source images
• Scan documents at 300 DPI minimum
• Use PNG for text documents
• Avoid multiple JPEG compressions
• Check image clarity before uploading
• Use "Fit to Image" to avoid additional scaling
• Ensure good lighting when photographing documents

Page Size Problems

Cause: Wrong page size selected for your content

Solution:

• Use "Fit to Image" to preserve original dimensions
• Match page size to your printing needs
• A4 for international, Letter for US
• Check recipient's requirements
• Consider your printer's capabilities
• Use Legal only when specifically needed

Browser Memory Issues

Cause: Too many high-resolution images processing at once

Solution:

• Process images in smaller batches
• Close unnecessary browser tabs
• Reduce image resolution before upload
• Use a computer with more RAM
• Try a different browser (Chrome or Firefox recommended)
• Split very large collections into multiple PDFs
• Clear browser cache and refresh

Memory Guidelines:

• Limit to 50-100 images per conversion
• Keep individual images under 10MB
• 4GB RAM minimum recommended
• 8GB+ RAM for large batches

Conversion Fails or Stalls

Cause: Corrupted image file or browser issue

Solution:

• Check if any images are corrupted
• Try removing images one at a time to identify problem file
• Ensure images are valid formats
• Refresh browser and try again
• Clear browser cache
• Try different browser
• Check file extensions match actual format

Images Look Distorted

Cause: Unusual aspect ratios or incorrect page size selection

Solution:

• Use "Fit to Image" option
• Check original image isn't already distorted
• Verify page size matches your needs
• Ensure images aren't pre-cropped incorrectly
• Use image editor to fix aspect ratio before uploading

Can't Select Multiple Images

Cause: Browser limitation or file dialog issue

Solution:

• Use Ctrl+Click (Windows) or Cmd+Click (Mac) to select multiple files
• Use Shift+Click to select range of files
• Drag and drop multiple files at once
• Try different file browser view (list vs icons)
• Upload in smaller batches if needed

Download Doesn't Start

Cause: Browser blocking download or popup blocker active

Solution:

• Check browser's download permissions
• Disable popup blockers temporarily
• Look for download prompt in address bar
• Try right-click "Save As" if option appears
• Check Downloads folder for file
• Refresh page and try conversion again

PDF Won't Open After Download

Cause: Incomplete download or corrupted file

Solution:

• Check file size isn't 0 bytes
• Re-download the PDF
• Try different PDF reader
• Verify conversion completed successfully
• Check disk space during download
• Try converting smaller batch to test

Advanced Tips

Optimizing for Different Use Cases

Email Attachments:

• Keep total size under 10MB
• Use JPEG for photos
• Compress images before upload
• Consider 1280×720 resolution max
• Test send to yourself first

Printing:

• Use 300 DPI images minimum
• Select appropriate page size (A4/Letter)
• Use PNG for text documents
• Preview before printing
• Consider printer capabilities

Web Sharing:

• Optimize for file size (under 5MB ideal)
• Use JPEG compression
• Reduce to screen resolution
• Test download speed
• Consider mobile viewers

Archival/Storage:

• Use highest quality settings
• PNG for documents
• Original resolution
• "Fit to Image" page size
• Maintain backup of originals

Working with Different Image Types

Photographs:

• JPEG format preferred
• 1920×1080 to 3840×2160 resolution
• "Fit to Image" or A4/Letter
• Check orientation before uploading

Scanned Documents:

• PNG format for text clarity
• 300 DPI scan resolution
• Match page size to original
• Ensure straight scans

Screenshots:

• PNG format
• Original resolution
• "Fit to Image" option
• Crop unnecessary areas first

Technical Drawings:

• PNG or high-quality JPEG
• High resolution maintained
• "Fit to Image" essential
• Preserve exact dimensions

Professional Document Creation

Cover Pages:

• Create professional title page
• Include document information
• Add date and author
• Upload as first image

Consistent Formatting:

• Maintain same orientation
• Use consistent image sizes
• Match page sizes throughout
• Keep quality uniform

Page Numbering:

• Add page numbers to images before conversion
• Use image editor for overlays
• Include total page count
• Consider footer with metadata

Branding:

• Add logo to key pages
• Use consistent headers
• Include contact information
• Professional color scheme

Privacy and Security

• 100% Client-Side Processing: All conversion happens in your browser
• No File Uploads: Your images never leave your device
• No Data Collection: We don't track, store, or analyze your files
• No Account Required: Use anonymously without registration
• Secure Processing: Files are processed in memory and cleared when done
• Safe for Confidential Documents: Perfect for sensitive business, legal, or personal images
• No Third-Party Services: No external APIs or cloud processing
• Complete Control: You maintain full control of your files at all times

Browser Compatibility

This tool works best with modern browsers:

• Google Chrome (recommended) - Best performance
• Mozilla Firefox (recommended) - Excellent compatibility
• Microsoft Edge - Full support
• Safari (macOS/iOS) - Good support
• Brave, Opera - Chromium-based browsers work well

Requirements:

• Modern browser (2020 or newer)
• JavaScript enabled
• Sufficient RAM (4GB minimum, 8GB+ recommended)
• No plugins or extensions required

Note: Internet Explorer is not supported. Please use a modern browser for the best experience.

Technical Details

• PDF Creation: Powered by pdf-lib library
• Image Processing: Browser Canvas API
• Format Support: All standard browser-supported image formats
• Memory Efficient: Processes images sequentially
• No Size Limits: Limited only by browser memory
• Quality Preservation: Maintains original image quality
• Fast Processing: Typical conversion takes seconds
• Cross-Platform: Works on Windows, Mac, Linux, iOS, Android