Private Lucaden PDF tool

Crop PDF Pages

Set visible crop margins on all or selected PDF pages without rasterizing page content.

Free to use Your PDF is processed on this device and is not uploaded to Lucaden.

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How it works

Complete the job in three clear steps

Choose one PDF and margin values from your device.
Set the page and output options, then create a PDF with updated crop boxes.
Inspect the downloaded result before replacing or deleting the original document.

Important

Check the result before relying on it

Keep an untouched copy of important source files. Browser processing depends on available device memory, and you should inspect every downloaded result before deleting the original.

Practical details

What this Lucaden tool does

The tool reduces each selected page crop box by the requested point margins. Cropped content remains in the underlying PDF and may be recoverable, so this is layout cropping rather than secure redaction.

The document stays in browser memory during processing. Lucaden creates a new output file and never modifies the source on your device.

Included capabilities

Four independent margins
Selected page cropping
Vector content preserved
Page-size validation

Useful for

Trim scanner borders
Hide registration marks
Standardize visible margins
Prepare page previews

Questions

About this tool

Does cropping permanently delete hidden content?

No. Crop boxes control visibility and are not a security or redaction feature.

What unit is used?

Margins use PDF points, where 72 points equal one inch.

Open-source foundations

Built transparently

Lucaden documents its standards sources, architectural references, and permissive runtime dependencies while keeping this workspace consistent with the Lucaden interface.

pdf-libMIT source Third-party noticesLicenses and attribution