Resize PDF

What is Resize PDF Pages?

Resize PDF Pages is a free browser-based tool that changes the page dimensions of your PDF to standard sizes such as A4, Letter, Legal, A3, or custom dimensions. Documents created in one region often use a different paper size than what is expected in another, and this tool lets you convert between formats seamlessly. It uses the pdf-lib JavaScript library to process your document entirely within your browser. No file is ever uploaded to a remote server, so sensitive legal papers, architectural plans, and personal documents remain fully private on your device.

When to Use Resize PDF Pages

Use this tool whenever you need to convert your PDF to a different page size. Common situations include:

• Converting a US Letter-sized document to A4 for printing in Europe or Asia.
• Resizing A4 documents to Letter size for North American printers.
• Scaling pages down to A5 or B5 for booklet-style printing.
• Enlarging a document to A3 or Tabloid for poster or signage printing.
• Matching page dimensions to a specific requirement from a publisher or filing authority.

How It Works

Upload your PDF by dragging it into the drop zone or selecting it via the file picker. Choose the target page size from the dropdown of standard formats, or enter custom width and height values. The tool uses pdf-lib to resize each page within your browser, scaling the content to fit the new dimensions while preserving the layout. Click apply, and the resized PDF is generated for instant download. Because everything runs client-side, the tool works offline once loaded, requires no account or sign-up, stamps no watermark on the output, and is entirely free.