Quick answer
- Open the Resize PDF tool and upload your file.
- Pick a target page size (A4, Letter, A3, etc.) or enter custom dimensions.
- Download your PDF with every page resized to fit the new dimensions.
"Resize" means page dimensions, not file size
This is the most common mix-up with this tool. Resizing changes how big each page is — its width and height, like A4 versus US Letter. It does not shrink how many megabytes the file takes up. If your goal is a smaller file to email or upload, you want Compress PDF instead; see our guide on reducing PDF file size for email.
Common reasons to resize a PDF
- A document made in A4 needs to print correctly on US Letter paper, or vice versa.
- Combining pages from different sources that were created at different page sizes, so the final document is consistent.
- Preparing a file for a printer or platform that requires a specific page size.
What happens to the content when you resize
The content on each page scales to fit the new page dimensions. Depending on the size change, this can add white space around the content or scale it down slightly — it's worth checking a preview of the result before using the final file for printing.
Not what you needed?
- Want a smaller file size? Use Compress PDF.
- Want to trim the visible area of a page instead of changing its size? Use Crop PDF.
- Want to split a scanned two-page spread into single pages? Use Split PDF Pages in Half.
Resize your file now
The PDFGuy Resize PDF tool handles this for free, in your browser, with your file never leaving your device.