Resize PDF Pages - Change PDF Page Size Online Free
Resize all pages of a PDF to any custom width and height in millimetres. Free, private, runs entirely in your browser.
Click to select a PDF file, or drag and drop
Your file never leaves your browserHow to Resize PDF Pages
- Upload the PDF whose page size you want to change.
- Enter the target width and height in millimetres (e.g. 210 × 297 for A4, or 216 × 356 for US Legal).
- Click Resize All Pages to apply the new dimensions and download the result.
Example
Entering 148 × 210 mm converts every page to A5, a common size for booklets. The dimensions are converted internally to PDF points (1 mm = 2.8346 pt), so the math stays precise regardless of rounding.
Common Use Cases
- Shrinking a Letter-sized PDF to A4 for international distribution.
- Preparing a custom-size document for a specific bindery or printer.
- Standardizing a collection of PDFs that have inconsistent page sizes into one uniform dimension.
FAQ
- What are common page sizes in millimetres? A4 is 210 × 297 mm, US Letter is 215.9 × 279.4 mm, US Legal is 215.9 × 355.6 mm.
- Will my text reflow? No — the page canvas is resized, but content is not reflowed. Very large size changes may cause content to appear near or off the page edges.
- Is my file uploaded anywhere? No — resizing happens entirely in your browser.