Selectively trim margins, resize pages for e-readers or printing, and remove unwanted content directly in your browser.
Drag & drop or select a file to begin
Max file size: 50MB • Processed locally
Draw a rectangle on the page to define your crop area
Adjust using the controls or drag the corners directly
File reduced by 0% • 1 pages modified
Processed locally • No data sent to servers
Cropping a PDF adjusts the CropBox property of the document, which defines the visible area of each page[citation:1]. Unlike physically cutting an image, this process hides content outside the defined boundaries without permanently deleting it from the file. This is why cropped PDFs may not see dramatic file size reduction—the original data often remains embedded but hidden[citation:7]. This method is perfect for creating cleaner layouts for presentations, e-readers[citation:7], or removing letterhead and footers from scanned documents.
Optimize for Different Displays: Resize pages for e-readers, tablets, or mobile screens[citation:7].
Prepare for Printing: Remove margins to ensure content fits specific paper sizes like A4 or Letter.
Clean Up Scans: Eliminate scanner bed shadows, page borders, or handwritten notes from the edges.
Focus Content: Highlight specific sections of a page, like a single chart or paragraph, for presentations or reports.
Create Consistent Layouts: Apply the same crop to multiple pages to standardize a document's appearance.
A PDF page can have several defined boundary boxes. The two most relevant for cropping are:
MediaBox: The physical size of the page, often matching the original paper size. This is usually the largest box.
CropBox: The region of the page displayed by PDF viewers and used for printing. Cropping adjusts this box[citation:1].
When you crop a page, you are redefining the CropBox coordinates (left, bottom, right, top) within the MediaBox[citation:1]. This tells viewers to only show the content within that new rectangle.
This tool uses PDF.js (by Mozilla) and PDF-Lib—open-source libraries that run entirely in your browser[citation:3][citation:5]. Your PDF file is never uploaded to an external server. It is loaded into your computer's memory, processed locally using JavaScript, and the downloadable file is created directly on your device. This ensures complete privacy for sensitive documents like contracts, financial reports, or personal identification.
• File Size: For significant size reduction, combine cropping with a compression tool[citation:9].
• "Hidden" Data: Cropped content may still be extractable with advanced PDF editing software[citation:7]. For secure redaction, use a dedicated tool.
• Batch Processing: This version crops one page at a time. For consistent cropping across many pages, use the "Apply to All" feature after setting the first page.
• Complex PDFs: Documents with forms, layers, or digital signatures may not crop perfectly with all libraries[citation:5].
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