How to use PDF Page Size Converter
- 1Add your PDF. A preview of the converted first page appears.
- 2Choose the target size, or Custom size in millimeters or inches.
- 3Choose orientation and how content is scaled: Fit, Fill or Keep size.
- 4Check the preview, click Convert and download the PDF.
Fit, Fill or Keep size
- Fit scales each page so all content is visible, adding white borders if the shapes differ. An optional margin adds extra space for printers.
- Fill covers the new page completely and crops the edges that do not fit.
- Keep size centers the original content without scaling.
Vector quality is kept
Content is scaled as vectors, not converted to images, so text stays sharp and searchable at any size. Links and comments are moved and scaled along with the page. Auto orientation keeps landscape pages landscape.
Common conversions
Letter to A4 (and back) for sharing documents between the US and the rest of the world, A4 to A5 for booklets, and A3 to A4 for printing drawings on a home printer. Processing runs in your browser and nothing is uploaded.
Frequently asked questions
How do I convert a US Letter PDF to A4?
Choose A4 as the target size and Fit as the scaling, then convert.
Will the text become blurry?
No. The page content is scaled as vectors, so text stays sharp.
Can I set a custom page size?
Yes. Choose Custom size and enter width and height in millimeters or inches.
What happens to landscape pages?
With Auto orientation they become landscape pages of the new size. You can also force all pages to portrait or landscape.