Is this tool really free?

Yes, all our PDF tools are completely free to use with no hidden costs, subscriptions, or per-file charges. We support the service through non-intrusive advertising, not by charging for basic document operations. You can use any tool as many times as you like, with no daily limits, file size restrictions, or account requirements whatsoever.

Absolutely. All PDF processing happens directly in your browser using local JavaScript and WebAssembly libraries. Your files are never uploaded to any server, never stored in the cloud, and never transmitted over the internet. The files remain entirely on your device from start to finish, giving you complete control over your sensitive and confidential documents.

How does auto-crop detect margins?

Auto-crop analyzes each page by scanning from the edges inward to find the boundary between white (empty) and non-white (content-bearing) pixels. It identifies the tightest bounding box that contains all non-white content and uses that as the crop boundary. The algorithm works on the rendered visual content of each page, making it effective for both text documents and image-heavy PDFs.

Can I adjust the auto-crop results?

Yes, after the auto-crop analysis, you can review the detected crop boundaries on the page preview and adjust them before applying. You can loosen the crop to add a small margin of whitespace around the detected content, or tighten it further if the algorithm preserved more whitespace than you wanted. Fine-tuning after auto-detection ensures the final result meets your requirements.

Will auto-crop work on scanned documents?

Yes, auto-crop is particularly effective for scanned documents, where the physical paper edges, scan artifacts, and shadows often create visible borders around the actual content. The tool detects the content area and trims away the excess scanner background. For documents with very light or watermarked backgrounds, adjust the sensitivity setting to avoid accidentally cropping content-bearing areas.

Can auto-crop handle pages with different content areas?

Yes, auto-crop analyzes each page independently and applies a crop specific to that page's content boundaries. Pages with different amounts of whitespace or differently positioned content receive individually optimized crop boxes. This per-page approach is more accurate than applying a single uniform crop when pages have varying layouts.

Does auto-cropping remove content from the PDF?

Auto-crop sets the page's crop box, which defines the visible area in PDF viewers. Depending on the PDF structure, the content outside the crop box may still be stored in the file but is hidden from view. Some PDF readers allow users to reset the crop box to reveal the hidden content. For permanent content removal, use the Crop tool with the appropriate settings.

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