⤢ Resize PDF

Resizing a PDF changes the page dimensions, for example switching between A4 and US Letter or scaling pages to fit a target size, so the document prints and displays the way you need.

What resizing a PDF does

Resizing rescales the page geometry to a new standard size while keeping the content in proportion. This is different from compression, which reduces file size; resizing is about the physical dimensions of each page rather than how many megabytes the file takes up.

When you switch between standards like A4 and Letter, the content is scaled to fit the new page, so text and images keep their relative positions even though the sheet is a slightly different shape. This matters most for printing, where a mismatch between the document size and the paper can cause clipped edges or unexpected margins. Standardizing a set of files to one size before merging also keeps the combined document looking consistent.

When resizing a PDF is useful

• A document created in A4 needs to print correctly on US Letter, or vice versa.
• You are standardizing a set of PDFs to one page size before merging.
• A print shop requires a specific page dimension.
• Pages of mixed sizes should be unified so the file looks consistent.

How Slate resizes pages locally

You pick the target page size and Slate rescales the pages and builds a new PDF in your browser, with no upload involved. The layout is preserved in proportion, so text and images keep their relative positions on the resized page.

Tips for resizing without surprises

• Match the size to your printer or the recipient's standard, usually A4 or Letter.
• Resize before adding page numbers or watermarks so they land in the right spot.
• Expect small margin changes when switching between metric and US sizes.
• If you only need a smaller file, use Compress PDF instead of resizing.