Resize PDF Pages

Print shops, portals and printers often want every page on one paper size — A4 in most countries, Letter in the US — while scans, exports and merged files arrive in a mix of sizes. This tool changes the paper size of PDF pages and scales the content the way you choose: fitted with its proportions intact, stretched, filled edge to edge, or left at its original scale. Text stays vector and selectable, and links and form fields move with the content.

How to use this tool

1. Choose one or more PDFs.
2. Pick the new paper size, or Custom and type the width and height in mm, inches or points.
3. Choose the orientation and how the content should be scaled.
4. Add a margin if you need white space or room for binding, and limit the pages if only some should change.
5. Download the resized PDF.

Formula

Fit: scale = min(available width ÷ page width, available height ÷ page height). Fill uses max instead of min and trims the overflow; Stretch scales width and height separately; No scaling keeps 100%. Available = new size − 2 × margin, and the content is centred.

Sizes are converted to PDF points: 1 inch = 72 pt and 1 mm = 72 ÷ 25.4 ≈ 2.835 pt, so A4 (210 × 297 mm) is 595.28 × 841.89 pt. Pages that are displayed rotated keep their orientation.

Example

A US Letter page (612 × 792 pt) resized to A4 with Fit and no margin: scale = min(595.28 ÷ 612, 841.89 ÷ 792) = min(0.973, 1.063) = 0.973, so the content shrinks by 2.7% and gets a white band of about 12.6 mm at the top and bottom ((841.89 − 792 × 0.973) ÷ 2 ≈ 35.8 pt).