📚 Frequently Asked Questions

C4Converter is a free online PDF toolkit offering four essential tools: PDF to DOCX converter, PDF merger, PDF splitter, and PDF to images converter. The name "C4" is our brand identity—it's not a file format. Our tools are designed for students, professionals, and office workers who need quick, secure PDF processing without installing software.

Yes, completely free with unlimited conversions. There are no hidden fees, no subscription plans, and no registration required. All four PDF tools—convert, merge, split, and images—are available for unlimited free use.

No account required! Simply visit the website, select your tool, upload your file, and process. No email, no signup, no hassle.

C4Converter works on all modern browsers including Chrome, Firefox, Safari, Edge, and Opera on Windows, Mac, Linux, iOS, and Android devices.

Step 1: Click the "PDF to DOCX" tab
Step 2: Upload your PDF file (max 50MB)
Step 3: Click "Convert to DOCX"
Step 4: Click the download button when processing completes

C4Converter preserves text, images, tables, and formatting as accurately as possible. Complex layouts with custom fonts or advanced formatting may require minor adjustments in Word, but most documents convert perfectly.

The maximum file size is 50MB per PDF. This limit ensures fast processing while handling most typical documents.

Most conversions complete in 10-30 seconds depending on file size and complexity. Larger files with many pages or images may take up to 2 minutes.

Step 1: Click the "Merge PDFs" tab
Step 2: Upload up to 10 PDF files
Step 3: Arrange files in your preferred order (drag if needed)
Step 4: Click "Merge PDFs"
Step 5: Download the combined PDF

You can merge up to 10 PDF files in a single operation, with a combined total size of 100MB maximum.

Yes! Files are merged in the order you upload them. Most browsers allow drag-and-drop reordering before finalizing the merge.

No. C4Converter maintains the original quality of all PDFs without compression. The merged file size equals the sum of input files.

Step 1: Click the "Split PDF" tab
Step 2: Upload your PDF file
Step 3: Enter page ranges (e.g., "1-5,8,10-12")
Step 4: Click "Split PDF"
Step 5: Download the ZIP file with extracted pages

Use these formats:
• "1-5" = pages 1 through 5
• "1,3,5" = only pages 1, 3, and 5
• "1-5,8,10-12" = pages 1-5, page 8, and pages 10-12
Separate multiple ranges with commas.

No limit on the number of pages you can extract! As long as your PDF is under 50MB, you can extract any pages you need.

Split pages are delivered as individual PDF files packaged in a ZIP archive. Each page is named "page_X.pdf" where X is the original page number.

Step 1: Click the "PDF to Images" tab
Step 2: Upload your PDF file
Step 3: Choose format (PNG or JPG) and DPI quality
Step 4: Click "Convert to Images"
Step 5: Download the ZIP file with all images

PNG and JPG formats are supported. PNG offers higher quality and transparency support, while JPG provides smaller file sizes. Choose based on your needs.

DPI (dots per inch) determines image quality:
• 150 DPI: Good for web use, smaller files
• 200 DPI: Balanced quality (recommended)
• 300 DPI: Print quality, larger files
Higher DPI = better quality but larger file sizes.

Yes! Every page in your PDF is converted to a separate image file. A 10-page PDF creates 10 image files, all packaged in a ZIP archive.

Absolutely. Your security is our priority:
• HTTPS encryption for all file transfers
• Secure server processing in isolated environment
• Automatic deletion immediately after processing
• No file storage - we never save your files
• No tracking - we don't collect personal data

Yes. All files are automatically permanently deleted from our servers immediately after processing. We do not store, view, analyze, or share your documents with anyone.

No. We have a strict no data retention policy. Your files are processed and deleted—never stored, analyzed, or used for any purpose beyond your requested conversion.

Yes! C4Converter is fully mobile-responsive and works perfectly on smartphones and tablets. You can also install it as a Progressive Web App (PWA) for an app-like experience.

No installation required! C4Converter is a 100% online tool that works directly in your web browser. No downloads, no plugins, no hassle.

File size limits (50MB per file, 100MB for merging) ensure fast, reliable processing for all users. These limits accommodate 99% of typical documents while preventing server overload.

If processing fails, you'll see an error message explaining the issue (usually file size, format, or corruption). Try reducing file size, checking the PDF integrity, or contact us if problems persist.