Crop PDF: Trim Margins & Adjust CropBox Dimensions
Crop PDF margins and trim excess whitespace across all pages or selected pages directly in your browser.
Privacy First: 100% Client-Side Processing
Processed in your browser. Files are never uploaded.
How to Use the Crop PDF: Trim Margins & Crop PDF Pages Online
- 1Upload your PDF document.
- 2Adjust the crop margins on the interactive preview.
- 3Download the cropped PDF file.
Formula & How It Works
PDF CropBox Coordinate Re-anchoring
Updates the /CropBox array in the PDF page dictionary [x_min, y_min, x_max, y_max].
Worked Examples
Trimming Scanned Book Margins
Input: book-page.pdf (wide white borders)
Explanation: Removes excess 2-inch margins for easier reading on e-readers.
Frequently Asked Questions
Does cropping a PDF delete hidden text?▼
Adjusting CropBox hides content from view; to completely strip underlying vectors, use Flatten PDF.
Quick Reference & Conversion Table
| PDF Box Type | Function in Document |
|---|---|
| MediaBox | Physical paper page boundary |
| CropBox | Visible display region rendered by PDF viewers |
| TrimBox | Intended final cut dimensions for commercial printing |
⚠️ Common Pitfalls to Avoid
- •Cropping too close to text boundaries, causing printer cutoffs.
💡 Practical Real-World Uses
- •Optimizing academic PDF papers and sheet music for iPad and Kindle reading.
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