Help & User Guide
Learn how to use our PDF tools effectively
Getting Started
Choose a Tool
Select the PDF tool you need from our homepage
Upload Files
Drag and drop your PDF files or click to browse
Configure Settings
Adjust settings according to your needs
Process & Download
Click process and download your result
Tools Guide
Merge PDF
Combine multiple PDF files into one
主要功能：
- Drag to reorder files
- Preview before merging
- Maintain original quality
Split PDF
Split PDF into multiple files
主要功能：
- Split by page range
- Split by page count
- Extract specific pages
Add Watermark
Add text or image watermarks
主要功能：
- Text and image watermarks
- Adjustable opacity
- Multiple positions
Tips & Best Practices
File Size Optimization
For best performance, keep individual PDF files under 100MB
Browser Compatibility
Use modern browsers like Chrome, Firefox, or Safari for optimal experience
Privacy & Security
All processing happens in your browser - your files never leave your device
Batch Processing
You can process multiple files at once for efficiency
Troubleshooting
Why is my file not uploading?
Make sure your file is a valid PDF and under 100MB. Check your internet connection and try again.
The processing is taking too long
Large files may take longer to process. Please be patient and don't close the browser tab.
My watermark is not visible
Try adjusting the opacity, color, or position of your watermark. Dark text works better on light backgrounds.
Can I process password-protected PDFs?
Currently, we don't support password-protected PDFs. Please remove the password first.