Crop PDF
Crop PDF page margins to eliminate excess white space or borders across your entire document. Process files locally in your browser with complete privacy.
PDF (.pdf) · one file
Tips
- Cropping adjusts the visible bounding box without deleting the underlying text stream or vector objects.
- Adjust the crop area on a single page to apply identical margin coordinates across the entire document.
- Trim dark scanner borders and printer registration marks to improve readability and presentation.
How to use it
- 1 Select or drag your PDF file into the editor.
- 2 Adjust the cropping frame handles over the page preview to define the desired margin boundaries.
- 3 Choose whether to apply the crop dimensions to the current page, a custom range, or all pages.
- 4 Save and download the modified PDF document to your local storage.
What you should know
Standard PDF documents define page boundaries using specific structural coordinates, notably the MediaBox for physical dimensions and the CropBox for visible viewing regions. Documents exported from desktop publishing software, scanned legal folios, or academic papers often contain oversized margins, binding offsets, or scanner shadow artifacts. Trimming these outer boundaries optimizes reading comfort on tablet displays and e-readers by maximizing typography scale. Because PDF coordinates operate on precise vector points, defining a new visible viewport eliminates visual clutter without degrading font sharpness, embedded vector graphics, or structural raster image resolution.
This tool updates the CropBox coordinates across your selected pages directly within browser memory using WebAssembly. You can visually define custom rectangular boundaries on any reference page and apply those exact offsets across individual sheets or the entire document. Cropping hides extraneous edge data from PDF viewers and standard desktop printers, but it does not permanently discard or sanitize the underlying content streams outside the frame. If your document contains confidential marginalia, redacted annotations, or sensitive text outside the crop perimeter, note that digital extractors can still retrieve hidden streams unless the file is fully rasterized or flattened.
Frequently asked questions
Does cropping a PDF reduce its total file size?
Cropping modifies visual bounding coordinates rather than stripping underlying data streams, so file size generally remains identical. To reduce file size, combine cropping with PDF compression or rasterization tools.
Does cropping permanently delete sensitive text located outside the frame?
No, standard PDF cropping only alters the visible viewport defined by the CropBox. Text, metadata, and graphics outside the cropped boundary remain embedded in the file structure and could be recovered by extraction utilities.
Are my confidential PDF files uploaded to an external server?
No, all document rendering, coordinate calculations, and PDF modifications execute entirely within your web browser. Your files never transfer over the network or get saved to remote storage.
Guides
Articles and format references related to this tool.
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