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PDF Margin Adjuster

Add, remove, or resize the margins on every page of a PDF with exact control over top, right, bottom, and left values in points, millimeters, or inches.

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Accepted: .pdf,application/pdf

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Adjust PDF Margins Online — Free & Private

Add extra whitespace for binding, shrink bloated margins to save paper, or crop into overscan — this free online PDF margin adjuster lets you set precise margins on every page of a PDF. Works entirely inside your browser so your documents never leave your device.

How it works

  1. Select a PDF — drag and drop or click to browse.
  2. Choose a unit: points (pt), millimeters (mm), or inches (in).
  3. Enter margin values for top, right, bottom, and left. Positive numbers add whitespace; negative numbers crop into the existing page.
  4. Click Apply margins. Each page is re-assembled onto a new canvas with your margins and the result is ready to download.

Handy presets

  • Zero all — start from no margin (useful when you plan to crop).
  • 0.5 in preset — applies a half-inch margin on every side (36 pt).
  • Crop −20 — subtracts 20 units from each side, handy for removing scanner overscan.

Common use cases

  • Preparing to print — add gutter space so text isn't cut off by printers or binding.
  • Matching templates — bring a PDF into line with a letterhead or publication template.
  • Removing excess whitespace — tighten eBook-style PDFs for on-screen reading.
  • Unifying mixed-source documents — make merged reports look consistent.
  • Reducing file size — cropping empty space can shrink output slightly.

How it works under the hood

Each source page is embedded and placed on a freshly sized page. New page dimensions become originalSize + (top + bottom, left + right). Because the content is drawn, not just reframed, it works correctly even when negative margins shrink the page.

Privacy

All computation happens locally. Your PDF is never uploaded. Use the tool on any modern browser, desktop or mobile.

Related tools

  • Crop PDF — crop pages with a visual selector.
  • Rotate PDF — change orientation before adjusting margins.
  • Compress PDF — shrink file size after editing.