Crop PDF Pages

About this tool

The UnblockPDF Crop tool adjusts the visible area of PDF pages by trimming margins, removing unwanted borders, or isolating specific content regions. The entire cropping process runs inside your browser, ensuring your documents remain private and are never transmitted to an external server. The tool provides two methods for defining the crop area. The visual editor lets you click and drag a selection rectangle over the page content, giving you an intuitive way to choose exactly what to keep. Alternatively, you can enter precise numerical values for the top, bottom, left, and right margins in millimeters or points for exact control. Both methods show a real-time preview of the cropped result so you can fine-tune the selection before applying it. You can apply the same crop dimensions to all pages at once for uniform trimming, or set different crop areas for individual pages when the content positioning varies across the document. This flexibility is particularly useful when working with scanned documents where the scan position may shift slightly from page to page, or when different sections of a document have different margin requirements. Technically, cropping in PDF modifies the page's crop box metadata rather than deleting the content outside the visible area. This means the original content data typically remains in the file but is hidden from view. Some advanced PDF tools may be able to restore the original page boundaries. If you need to permanently remove the content outside the crop area, flattening the document after cropping can help, though full content removal depends on the specific PDF structure. Common use cases include removing excessive white margins from scanned documents, trimming printer marks and bleed areas from production PDFs, isolating a specific diagram or table on a page for extraction, cropping scanned book pages to remove binding shadows, and standardizing page dimensions across a document with inconsistent margins. The cropped output can be downloaded immediately or further processed with other UnblockPDF tools. The tool supports files up to 50 MB for anonymous users and 100 MB for registered accounts, and works across all modern browsers.

Common use cases

Tips for best results

• Use the visual crop editor for quick selections and switch to numerical margin values when precise measurements are required.
• After cropping, use the Compress tool to reduce file size, as the hidden content may still contribute to the file's internal data.
• Apply uniform crop dimensions to all pages when working with consistently formatted documents like scanned book pages.
• Flatten the document after cropping with the Flatten tool if you want to ensure the hidden content outside the crop area is less accessible.