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Complete Main PDF Tools Documentation
Your comprehensive guide to all PDF tools available on Main PDF - features, detailed usage instructions, limitations, and best practices
PDF Conversion Tools
PDF to Word
Convert PDF files to fully editable Microsoft Word documents while preserving original formatting, fonts, and layout.
Key Features
- Preserves original document formatting including fonts, tables, and images
- Advanced OCR technology for scanned PDF documents
- Batch processing of multiple PDF files simultaneously
- Maintains hyperlinks, footnotes, and document structure
- Outputs in .docx format compatible with Word 2007+
- Option to convert to RTF for broader compatibility
- Preserves page layout including margins and columns
How to Use
- Click the "Choose File" button or drag and drop your PDF document into the upload area
- Select conversion options:
- Enable OCR for scanned documents
- Choose image quality (low, medium, high)
- Select page range (all pages or specific pages)
- Click the "Convert to Word" button to start the conversion process
- Wait for the processing to complete (progress bar will show status)
- Preview the converted document if needed
- Click "Download" to save the Word file to your device
Limitations
- Complex multi-column layouts may not convert perfectly and may require manual adjustment
- Password-protected PDFs require password entry before conversion
- Maximum file size of 50MB for free users (100MB for premium)
- OCR accuracy depends on original scan quality (recommended 300dpi or higher)
- Some advanced PDF features like 3D models or multimedia may not convert
Word to PDF
Convert Microsoft Word documents to high-quality PDF files with perfect layout preservation for professional sharing and archiving.
Key Features
- Maintains all Word formatting including styles, headers, and footers
- Supports both .doc (Word 97-2003) and .docx (Word 2007+) formats
- Preserves hyperlinks, tables of contents, and document properties
- Option to optimize PDF for web (smaller size) or print (higher quality)
- Creates searchable PDFs with selectable text and metadata
- Batch conversion of multiple Word files at once
- Add password protection and permissions to output PDF
How to Use
- Upload your Word document by clicking "Select Files" or drag and drop
- Configure PDF settings:
- Page size (Letter, A4, Legal, etc.)
- Orientation (Portrait or Landscape)
- Margin settings
- Security options (password, permissions)
- Click "Convert to PDF" to begin the conversion
- Wait for processing to complete (typically a few seconds per page)
- Download the PDF file or save directly to cloud storage
Limitations
- Macros and active content are removed during conversion
- Track changes and comments may not be preserved in the PDF
- Embedded fonts must be available on the system for accurate rendering
- Maximum 100 pages for free users (unlimited for premium)
- Very complex Word documents may require manual adjustment after conversion
PDF to Excel
Extract tables and data from PDF documents into editable Excel spreadsheets with accurate column recognition and formatting.
Key Features
- Accurate table detection and data extraction from PDFs
- Preserves numerical formatting (currency, percentages, dates)
- Handles complex tables with merged cells and spanning columns
- OCR capability for scanned PDF documents
- Outputs in .xlsx format compatible with Excel 2007+
- Option to extract all tables or select specific tables
- Preserves header rows and maintains data relationships
How to Use
- Upload your PDF file containing tables or data
- Select extraction options:
- Automatic table detection or manual area selection
- OCR for scanned documents (if needed)
- Output format (.xlsx or .csv)
- Preview detected tables and adjust selection if necessary
- Click "Convert to Excel" to begin extraction
- Download the Excel file with your extracted data
Limitations
- Poor quality scans may result in extraction errors
- Tables without clear borders may not be detected accurately
- Maximum 20 pages per document for free users
- Handwritten tables are not supported
- Complex financial statements may require manual verification
Excel to PDF
Convert Excel workbooks and sheets to PDF format while maintaining all formulas, charts, and formatting for professional presentation.
Key Features
- Converts Excel workbooks while preserving all data and formatting
- Maintains charts, graphs, and visual elements in high quality
- Option to convert entire workbook or selected sheets
- Preserves cell formulas (displayed as values in PDF)
- Supports .xls and .xlsx file formats
- Customizable print area and scaling options
- Add headers, footers, and page numbers to output PDF
How to Use
- Upload your Excel file (.xls or .xlsx format)
- Select conversion options:
- Entire workbook or specific sheets
- Page orientation and scaling
- Gridlines and headings visibility
- Preview the PDF output before final conversion
- Click "Convert to PDF" to process your file
- Download the PDF or share via email/link
Limitations
- Interactive Excel features (dropdowns, macros) are not preserved
- Very large workbooks may take longer to process
- Maximum 10 sheets per workbook for free users
- Conditional formatting may appear differently in PDF
- External links and references are converted to static values
Image to PDF
Convert JPG, PNG, GIF, BMP and other image formats into high-quality PDF documents with adjustable page sizes and orientations.
Key Features
- Supports JPG, PNG, GIF, BMP, TIFF, and WebP formats
- Multiple images combined into single PDF or separate pages
- Adjustable page size (A4, Letter, Legal, custom)
- Option to set portrait or landscape orientation
- Image enhancement options (auto-contrast, brightness)
- Batch processing of multiple images at once
- Preserves original image quality in output PDF
How to Use
- Upload your images by clicking "Select Files" or drag and drop
- Arrange images in desired order (drag to reorder)
- Configure PDF settings:
- Page size and orientation
- Image fit (full page, actual size, custom scaling)
- Margin settings
- Preview the PDF layout before conversion
- Click "Create PDF" to generate your document
- Download the PDF file with your images
Limitations
- Maximum 50 images per conversion for free users
- Very high resolution images may be resized for performance
- Animated GIFs are converted as static images
- Transparency in PNGs may not be preserved in PDF
- Maximum total file size of 100MB per conversion
PDF to Image
Transform PDF pages into high-resolution JPG, PNG or TIFF images with customizable DPI settings for presentations, websites, or graphic design.
Key Features
- Convert to JPG, PNG, or TIFF format
- Adjustable DPI settings (72-600 DPI)
- Convert all pages or select specific pages
- Option to output as single images or ZIP archive
- Preserves original PDF quality in output images
- Customizable image quality and compression
- Batch process multiple PDFs simultaneously
How to Use
- Upload your PDF file or drag it into the upload area
- Select conversion options:
- Output format (JPG, PNG, TIFF)
- DPI resolution (higher for better quality)
- Page range (all, current, or custom range)
- Preview the first page conversion if desired
- Click "Convert to Images" to process your file
- Download the images as individual files or ZIP archive
Limitations
- Higher DPI settings result in larger file sizes
- Maximum 50 pages per conversion for free users
- Text may not be selectable in output images
- Vector graphics are rasterized in output
- Password-protected PDFs require password first
PDF Editing & Organization
Merge PDF
Combine multiple PDF files into a single organized document with customizable page order and orientation.
Key Features
- Merge unlimited PDFs in any order (drag and drop interface)
- Preview pages before merging with thumbnail view
- Option to rotate, delete, or rearrange individual pages
- Preserves original quality and security settings
- Add blank pages or separator pages between documents
- Batch processing of multiple files at once
- Option to maintain or flatten annotations and forms
How to Use
- Upload files by clicking "Add Files" or drag and drop into the merge area
- Rearrange files in your preferred order using drag and drop
- Use the preview panel to:
- Rotate pages as needed
- Delete unwanted pages
- Adjust page order within documents
- Set output options:
- Document properties (title, author)
- Security settings
- File optimization level
- Click "Merge PDFs" and download your combined file
Limitations
- Maximum total size of 150MB for free users
- Some advanced security settings may prevent merging
- Forms and annotations may need re-application after merge
- Maximum 20 files at once for free users
- Very large documents may take longer to process
Compress PDF
Reduce PDF file size significantly without visible quality loss using advanced compression algorithms optimized for web sharing and email.
Key Features
- Three compression levels (low, medium, high)
- Smart compression that analyzes document content
- Reduces file size while maintaining readability
- Option to downsample images to specific DPI
- Removes duplicate fonts and unnecessary metadata
- Preserves text quality while compressing images
- Batch processing of multiple files
How to Use
- Upload your PDF file or drag it into the upload area
- Select compression level:
- Low (minimum compression, highest quality)
- Medium (balanced compression)
- High (maximum compression, some quality loss)
- Advanced options (optional):
- Image quality adjustment
- Font and metadata removal
- PDF version compatibility
- Click "Compress PDF" to begin processing
- Preview the compressed version before downloading
- Download the compressed file or save to cloud storage
Limitations
- High compression may reduce image quality noticeably
- Password-protected files require password first
- Maximum input file size of 200MB
- Some advanced PDF features may be simplified
- Digital signatures may be invalidated by compression
Split PDF
Divide large PDFs into smaller files by extracting specific pages or splitting by page ranges, bookmarks, or file size.
Key Features
- Split by page ranges (custom or fixed intervals)
- Extract specific pages into separate files
- Split by maximum file size (MB)
- Split by bookmarks (creates files at each bookmark)
- Batch process multiple splitting operations
- Option to delete pages while splitting
- Preserves original document properties
How to Use
- Upload your PDF file to be split
- Choose splitting method:
- Page ranges (e.g., 1-3, 4-5)
- Fixed page intervals (every 5 pages)
- By file size (split when reaches X MB)
- By bookmarks (split at each bookmark)
- Preview the split points before processing
- Click "Split PDF" to create the separate files
- Download individual files or as a ZIP archive
Limitations
- Maximum 300 pages per document for free users
- Password-protected files require password first
- Split by bookmarks may not work with complex documents
- Maximum 10 output files per operation for free
- Very large files may take longer to process
Sign PDF
Add legally-binding digital signatures to PDF documents with options to draw, type, or upload your signature.
Key Features
- Multiple signature options (draw, type, upload image)
- Legally binding digital signatures with timestamp
- Add signature fields anywhere in the document
- Multiple signers support with signing order
- Save signature profiles for future use
- Add initials, date stamps, and text fields
- Option to require password for signing
How to Use
- Upload the PDF document you need to sign
- Create your signature:
- Draw with mouse/touch
- Type and choose signature style
- Upload scanned signature image
- Drag and position signature fields in the document
- Set signing options:
- Signature appearance
- Required fields
- Password protection
- Click "Apply Signature" to finalize
- Download the signed document or send to others
Limitations
- Not a qualified digital signature (for simple agreements)
- Maximum 3 signers for free users
- Password-protected PDFs require password first
- Advanced certificate-based signatures require premium
- Some PDF security settings may prevent signing
PDF Organizer
Rearrange, rotate, delete, or insert pages in your PDF documents with drag-and-drop simplicity.
Key Features
- Drag and drop page reordering
- Rotate pages in 90° increments
- Delete unwanted pages
- Insert blank pages or other PDFs
- Split view for easy page comparison
- Batch apply changes to multiple pages
- Preview changes before saving
How to Use
- Upload your PDF document
- Use the thumbnail view to:
- Drag pages to reorder
- Select pages to delete or rotate
- Right-click for more options
- Add pages from other PDFs or insert blanks
- Use the preview panel to verify changes
- Click "Save PDF" to apply your changes
- Download the reorganized document
Limitations
- Maximum 100 pages per document for free users
- Some secured PDFs may prevent editing
- Annotations may need re-application after reorganization
- Maximum 5 documents for merging pages
- Very large files may be slower to process
PDF Repair
Fix corrupted or damaged PDF files that won't open properly by rebuilding the document structure.
Key Features
- Repairs corrupted PDF file structures
- Recovers text, images, and formatting
- Fixes "invalid or damaged file" errors
- Recovers password-protected files (if password known)
- Multiple repair algorithms for different corruption types
- Option to extract recoverable content only
- Batch process multiple damaged files
How to Use
- Upload your damaged PDF file
- Select repair options:
- Basic repair (for minor corruption)
- Advanced repair (for severely damaged files)
- Content extraction only
- For password-protected files, enter the password
- Click "Repair PDF" to begin recovery process
- Preview recovered content before saving
- Download the repaired PDF file
Limitations
- Cannot recover files with physical media damage
- Password-protected files require password
- Some formatting may not be fully restored
- Maximum file size of 100MB for repair
- Severely corrupted files may have partial recovery
Other Useful Tools
Online Clipboard
Copy and paste between devices with our secure cloud clipboard service that syncs in real-time.
Key Features
- Sync text across all your devices in real-time
- Store multiple clipboard items with history
- 256-bit encryption for all clipboard contents
- Share clipboard items via secure links
- Works across Windows, Mac, iOS and Android
- Browser extension for easy access
- Offline mode with sync when connected
How to Use
- Sign in to your MainPDF account (or create one)
- Install browser extension or mobile app (optional)
- Copy text as normal on any device
- Paste on any other device logged into same account
- Access clipboard history from the web interface
- Manage items (delete, favorite, share) as needed
Limitations
- Text only (no images or rich formatting)
- Maximum 10KB per clipboard item
- History limited to 30 days for free accounts
- Requires account sign-in for cross-device sync
- Maximum 100 items in history for free users
Image Resizer
Resize multiple images simultaneously to exact dimensions or percentages while maintaining aspect ratio.
Key Features
- Resize by pixels, percentage, or print dimensions
- Maintain aspect ratio or custom dimensions
- Batch process multiple images simultaneously
- Supports JPG, PNG, GIF, BMP, and WebP formats
- Option to compress while resizing
- Preserve EXIF data (optional)
- Preview before downloading
How to Use
- Upload images or drag them into the upload area
- Set resize options:
- Exact dimensions (width/height in pixels)
- Percentage scaling
- Print dimensions (inches/cm with DPI)
- Choose whether to maintain aspect ratio
- Set output format and quality
- Click "Resize Images" to process
- Download individual files or as a ZIP archive
Limitations
- Maximum 20 images per batch for free users
- Maximum 10MB per image
- Animated GIFs are converted to static images
- Some metadata may be stripped during processing
- Vector formats (SVG) are converted to raster
Calculator
Powerful online calculator with scientific functions, unit conversions, and calculation history.
Key Features
- Basic, scientific, and programmer modes
- Unit conversions (length, weight, temperature, etc.)
- Calculation history and memory functions
- Graph plotting for equations
- Currency conversion with live rates
- Complex number support
- Save and load calculation sessions
How to Use
- Select calculator mode (Basic, Scientific, Programmer)
- Enter calculations using mouse or keyboard
- For unit conversions:
- Select conversion category
- Choose input and output units
- Enter value to convert
- Access history panel to review past calculations
- Save important calculations for future reference
- Switch to graphing mode to plot equations
Limitations
- No offline functionality (requires internet)
- Currency rates update every hour (not real-time)
- Maximum 1000 points in graphing mode
- Complex 3D graphing not supported
- History limited to 100 entries for free users
News & Updates
Stay informed about the latest features, updates, and announcements regarding our PDF tools and services.
Key Features
- Latest tool releases and feature updates
- Maintenance schedules and outage notices
- Tips and tutorials for using our tools
- User success stories and case studies
- Security and privacy policy updates
- Subscribe to email notifications
- RSS feed available
How to Use
- Visit the News & Updates page regularly
- Browse articles by category or date
- Use search to find specific topics
- Subscribe to email updates (optional)
- Follow us on social media for real-time updates
- Check the changelog for technical details
Limitations
- Email subscriptions limited to 2 per month for free users
- Archived articles older than 2 years may be unavailable
- Some technical details may be simplified in public posts
- Real-time updates only available via social media
World Clock
Track current times across multiple time zones simultaneously with our interactive world clock.
Key Features
- Display multiple time zones simultaneously
- Compare times across different locations
- Daylight saving time adjustments
- Set favorite locations for quick access
- Time difference calculator
- Meeting planner for scheduling across time zones
- Analog and digital clock displays
How to Use
- Add locations by searching or selecting from map
- Reorder clocks by dragging
- Click on a clock to see details:
- Current date and time
- Sunrise/sunset times
- UTC offset
- Use the meeting planner to find suitable times across zones
- Save your favorite locations for future visits
Limitations
- Maximum 5 locations for free users
- No offline functionality
- Historical time zone data limited
- Some very small locations may not be available
Network Speed Test
Test your internet connection speed with detailed metrics including download, upload, ping, and jitter measurements.
Key Features
- Measure download and upload speeds
- Ping latency and jitter measurements
- Multiple server locations worldwide
- Historical test results tracking
- Detailed connection diagnostics
- Mobile-friendly testing interface
- Compare results to global averages
How to Use
- Close other bandwidth-intensive applications
- Select a test server location (or use auto-selection)
- Click "Start Test" to begin measurement
- Wait while the test runs (typically 30-60 seconds)
- View detailed results including:
- Download and upload speeds
- Ping and jitter measurements
- Connection stability graph
- Save or share your results if desired
Limitations
- Results may vary based on network conditions
- Maximum test duration of 2 minutes
- Some corporate networks may block testing
- Historical data limited to 30 days for free users
- Mobile results may be less accurate than wired