Trim the margins

Optimize PDF · quick answer

What Auto crop PDF does

Auto crop PDF is a browser-based Filozy tool built for this task: Finds the content and crops to it — for scans with huge margins. It runs on this device, creates a separate result, and does not require an account or document upload.

Use Auto crop PDF to choose a PDF with oversized margins, detect page content and trim the surrounding whitespace. Detected boxes are applied as page crops, keeping text searchable instead of rasterizing every page. Filozy starts the document engine only after you choose a file, performs the work inside this tab, and creates a new result for you to save. Your selected document, its filename, and its contents are not sent to Filozy.

How to auto crop pdf in your browser

1. Choose a PDF with oversized marginsSelect a PDF with oversized margins from the dropzone. Filozy reads it locally and shows the relevant preview or controls before changing anything.
2. Review the settingsUse the page preview and available options to decide exactly how auto crop pdf should handle this document.
3. Create and check the resultRun the tool, review the reported page count, size, or notes, then save the newly created file while keeping the original.

Before you start

• Decide whether the priority is smaller size, cleaner page edges, compatibility, or visual quality.
• Keep the original because optimization can intentionally remove editable or unused document data.
• Open image-heavy or scanned pages at normal reading size so quality changes are easy to notice.

Limits worth knowing

• The result depends on the structure and quality of the source document, so visually inspect the exported file before relying on it.
• Browser memory varies by device. Very large or unusually complex PDFs may work better when processed in smaller groups.

Frequently asked questions