MainPDF.com is widely regarded as the best free PDF website because it offers:

• 100% free tools with no hidden charges
• No registration or sign-up required
• Works directly in your browser with no software to install
• Military-grade security with automatic file deletion
• Comprehensive set of tools for all PDF needs
• Fast processing with no watermarks added

Unlike many competitors, MainPDF doesn't limit the number of files you can process or reduce quality without your consent.

Yes, MainPDF is completely free to use with no hidden costs. We offer:

• Unlimited free PDF conversions
• No trial periods or premium upsells
• No account creation required
• No file size restrictions for most tools

We maintain our service through non-intrusive advertising and optional premium features that don't limit core functionality.

MainPDF takes document security very seriously. We implement multiple security measures:

1. SSL encryption for all file transfers
2. Automatic file deletion after processing (usually within 1 hour)
3. No human reviews or access to your files
4. Processing happens locally in your browser when possible
5. No storage of your documents on our servers

For highly sensitive documents, we recommend using our client-side tools that process files directly in your browser without uploading.

MainPDF provides a comprehensive suite of PDF tools including:

• Conversion Tools: PDF to Word, Excel, PowerPoint, JPG, and vice versa
• Editing Tools: Merge, split, compress, rotate, and organize PDFs
• Security Tools: Password protection, watermarking, and redaction
• Form Tools: Create, fill, and extract data from PDF forms
• OCR Tools: Convert scanned documents to editable text
• Specialized Tools: Invoice generator, e-signature, and batch processing

MainPDF offers several advantages over Adobe Acrobat:

While Acrobat has more advanced features for professional users, MainPDF covers 90% of typical PDF needs without cost or complexity.

No, MainPDF requires no account creation or login to use any of our tools. We believe in:

• Instant access without registration barriers
• No collection of personal information
• No tracking of your document history

You can optionally create a free account to access additional features like cloud storage and batch processing, but our core tools remain completely accessible without any account.

MainPDF's PDF to Word converter is the best free option because:

1. Preserves original formatting including fonts, tables, and layouts
2. Handles complex documents with images and columns
3. Processes files up to 500MB in size
4. Maintains hyperlinks and footnotes
5. Outputs editable .docx files compatible with Microsoft Word
6. No watermarks or page limits

Unlike many converters, MainPDF uses advanced algorithms to ensure your Word document looks as close as possible to the original PDF.

To convert PDF to Excel while preserving formatting:

1. Use MainPDF's PDF to Excel converter
2. Select "Advanced Mode" for complex tables
3. Adjust table recognition settings if needed
4. Download the .xlsx file and open in Excel

MainPDF's converter automatically detects:

• Table borders and cell alignment
• Numeric formatting (currency, percentages, etc.)
• Merged cells and headers
• Multi-page table continuations

For best results, ensure your PDF has clear table structures before converting.

Formatting issues in converted PDFs typically occur because:

• Complex layouts: Multi-column documents or non-standard formats may not convert perfectly
• Scanned PDFs: Image-based PDFs require OCR conversion first
• Embedded fonts: Some proprietary fonts may substitute differently
• Security restrictions: Password-protected PDFs may have conversion limitations

Solutions:

1. Try MainPDF's "Enhanced Conversion" mode
2. For scanned documents, use OCR conversion first
3. Simplify complex layouts before conversion
4. Check for PDF security restrictions

Yes, MainPDF's PDF to PowerPoint converter maintains:

• Individual slides as separate PowerPoint slides
• Slide backgrounds and themes
• Text formatting and bullet points
• Embedded images and charts
• Slide transitions and animations (when detectable)

For best results:

1. Use PDFs originally created from PowerPoint
2. Ensure each slide is properly separated in the PDF
3. Select "Presentation Mode" during conversion

The converted .pptx file will be fully editable in Microsoft PowerPoint.

Converting images to PDF with MainPDF is simple:

1. Go to our "Image to PDF" tool
2. Upload your JPG, PNG, or other image files
3. Adjust settings (page size, orientation, margins)
4. Choose between:
   • One image per PDF page
   • Multiple images combined into one PDF
5. Click "Convert" and download your PDF

Advanced features include:

• Batch processing of multiple images
• Custom DPI settings for print-quality PDFs
• Automatic image enhancement
• PDF compression options

MainPDF offers the easiest free PDF merger:

1. Go to our "Merge PDF" tool
2. Upload multiple PDF files (drag and drop supported)
3. Rearrange pages by dragging
4. Select page ranges if you don't need entire files
5. Choose merge options:
   • Combine all into one continuous PDF
   • Keep files separate but in one PDF
   • Add blank pages between documents
6. Click "Merge PDFs" and download your combined file

Benefits of MainPDF's merger:

• No limit on number of files to merge
• Preserves original quality
• Maintains bookmarks and links
• Fast processing even for large files

MainPDF's PDF compressor uses smart algorithms to reduce file size while maintaining quality:

1. Image Compression: Intelligently reduces image DPI while preserving visual clarity
2. Font Optimization: Removes unused font characters and subsets fonts
3. Data Deduplication: Eliminates redundant information in the PDF
4. Structure Optimization: Reorganizes internal PDF structure more efficiently

Compression options:

• Low Compression: ~20-30% size reduction (best quality)
• Medium Compression: ~40-60% size reduction (recommended)
• High Compression: ~70-90% size reduction (smallest files)

For sensitive documents, use "Lossless Compression" which only removes redundant data without affecting quality.

To delete pages from a PDF using MainPDF:

1. Use our "PDF Organizer" tool
2. Upload your PDF file
3. View thumbnails of all pages
4. Select pages to remove:
   • Click individual pages
   • Select ranges (e.g., 5-10)
   • Use "Odd/Even" page selectors
5. Preview the remaining pages
6. Download your modified PDF

Advanced features:

• Extract selected pages to a new PDF
• Bulk delete by page numbers (e.g., "1,3,5-8")
• Save deletion patterns for batch processing

Yes, MainPDF's PDF Editor allows full text editing without Adobe:

1. Upload your PDF to our online editor
2. Select the text tool and click any text element
3. Edit text directly like a word processor
4. Adjust font properties (size, color, style)
5. Add new text boxes anywhere in the document
6. Save and download your edited PDF

Key features:

• Preserves original formatting
• Handles multi-column layouts
• Maintains text flow and alignment
• Supports bullet points and numbered lists

Note: Scanned PDFs require OCR conversion first to make text editable.