How to Crop a PDF — Free Methods That Actually Work

Updated March 9, 2026 • 7 min read

You have a PDF with too much white space, an unwanted header, or margins that make it look weird when you embed it somewhere. You need to crop it. Sounds simple, but PDF cropping is surprisingly annoying if you don't know where to look.

The problem is that PDFs weren't designed to be edited. They're a final format — the digital equivalent of printing something on paper. Cropping means you're essentially redefining where the "paper" ends. Here's how to do it without paying for expensive software.

What PDF Cropping Actually Does

Before we get into methods, a quick note: cropping a PDF doesn't delete the content outside the crop area. It hides it. The data is still in the file. If you need to permanently remove content (for privacy reasons, say), you'll want to use a PDF editor or flatten the file after cropping.

For most people, hiding the content is fine. You're adjusting the visible area — trimming margins, removing headers and footers, or isolating a specific section of a page.

Method 1: Crop a PDF Online (No Software)

The fastest approach if you don't want to install anything. Browser-based PDF tools handle cropping well for most use cases.

Our PDF editor lets you adjust page boundaries directly in your browser. Upload your file, select the area you want to keep, and download the cropped version. Everything happens locally — your file never leaves your device.

This works best for simple crops: removing margins, cutting off a header or footer, or isolating one section of a page. If you need pixel-precise cropping or need to crop different pages differently, you might want a desktop tool.

Method 2: Using Preview on Mac

If you're on a Mac, Preview is already installed and handles basic PDF cropping surprisingly well.

  1. Open your PDF in Preview
  2. Click the markup toolbar button (the pen icon)
  3. Select the rectangular selection tool
  4. Draw a rectangle around the area you want to keep
  5. Go to Tools and select Crop (or press Command+K)
  6. Save the file

One quirk: Preview's crop is non-destructive by default. If you open the file later and click "Revert," the original uncropped version comes back. To make it permanent, export the file as a new PDF after cropping.

Method 3: Using Adobe Acrobat

Acrobat is the gold standard for PDF editing, and its crop tool is the most precise option available. If you have a subscription, here's how:

  1. Open your PDF in Acrobat
  2. Go to Edit and then Crop Pages
  3. Draw the crop rectangle or enter exact dimensions
  4. Choose which pages to apply the crop to (current page, a range, or all)
  5. Click OK

Acrobat lets you set margins numerically, which is useful when you need consistent cropping across multiple pages. You can also set different crop areas for different page ranges in the same document.

The downside: Acrobat costs $13-23/month. For occasional cropping, that's overkill. Use a free tool instead.

Method 4: Using a Free Desktop Tool

If you need a free desktop solution, PDF-XChange Editor (Windows) and GIMP (cross-platform) both handle cropping. PDF-XChange is more intuitive for this specific task — it has a dedicated crop tool that works similarly to Acrobat's.

On Linux, you can use the command-line tool pdfcrop (part of TeX Live) which automatically trims white margins. Run pdfcrop input.pdf output.pdf and it strips all the excess whitespace. It's blunt but effective for removing margins.

Cropping vs. Trimming vs. Splitting

These are related but different operations:

  • Cropping adjusts the visible area of a page (what we've been discussing)
  • Trimming permanently removes content outside the crop area
  • Splitting separates a multi-page PDF into individual pages — use our PDF split tool for that
  • Extracting pulls specific pages from a PDF — our page extraction tool handles this

If you're trying to get just a few pages out of a larger document, you probably want splitting or extracting rather than cropping.

Cropping Multiple Pages at Once

The most common frustration: you crop one page and then realize you need to apply the same crop to all 50 pages. Not every tool supports batch cropping.

Acrobat does this natively. In the crop dialog, select "All pages" instead of "Current page." For free tools, look for a "apply to all pages" option, or use a command-line approach like pdfcrop which automatically crops every page.

Common Issues and Fixes

Crop reverts when reopened: The crop wasn't saved permanently. Re-crop and export as a new PDF (File then Export, not just Save).

File size didn't change after cropping: Cropping hides content but doesn't remove it. If file size matters, compress the PDF after cropping, or flatten it to permanently remove hidden data.

Text is cut off after cropping: You cropped too aggressively. Undo and redraw the crop area with a bit more margin. Most tools show a preview before applying.

Scanned PDF won't crop cleanly: Scanned PDFs are essentially images wrapped in PDF format. Cropping works, but if you need text extraction too, run OCR first.

When Cropping Isn't What You Need

Sometimes people search for "crop PDF" when they actually want something else: