Crop PDF Online
Trim margins and adjust document layout instantly. Secure, client-side processing.
Upload PDF to Crop
Click or Drag & Drop
* Click and drag on the document to select the area you want to keep.
How to Crop PDF Files for Free
Cropping a PDF is a specialized task often required to remove unwanted borders, visible crop marks, or to focus on a specific section of a document. Unlike image cropping, cropping a PDF involves adjusting the "MediaBox" and "CropBox" definitions within the file's internal structure. Our tool handles this complexity for you, providing a simple visual interface to trim your documents.
Why Use This Tool?
- Accuracy: Our visual editor ensures you select exactly what you want to keep.
- Privacy: We use WebAssembly technology to process your files directly in your browser. No documents are uploaded to any server.
- Speed: Since there is no upload or download time for processing, large files are handled instantly.
Step-by-Step Instructions
1. Upload: Select your PDF file from your device. The first page will load in the editor.
2. Select Area: Click and drag your mouse across the page to draw a rectangle. The area inside the rectangle is what will be preserved; everything outside (in the shadowed area) will be cropped out.
3. Adjust: If you aren't happy with the selection, simply click "Reset Selection" or draw a new box.
4. Download: Click "Crop PDF & Download". The tool will apply this crop area to all pages in the document (or the specific page logic, depending on your needs) and instantly generate a new file.
Technical Note on PDF Cropping
This tool modifies the viewable area of the PDF. Note that in the PDF standard, cropping is often "non-destructive," meaning the data outside the crop box might still exist in the file but is hidden from view. This is perfect for printing and presentation purposes.