pdf page size
Put every page
on a different sheet.
Choose a sheet — A4, Letter, whatever the printer wants — and every page in the document goes onto it. You choose whether the content is scaled to fit or left at its size. It runs in your browser: the file never leaves your device.
Drop a PDF here, or choose one
Questions
What is the difference between the two modes?
One scales your content, the other does not. Scale to fit shrinks or enlarges everything on the page until it lands inside the new sheet, keeping its shape — a sheet of a different proportion leaves a margin on two sides. Leave at its size changes the sheet and nothing else, so on a smaller sheet the content runs past the edge. Both are real operations and neither is the safe default, which is why the page makes you choose.
My content is cut off after I changed the sheet. Is it gone?
No. Nothing is removed from the file in either mode. If you chose to leave the content at its size and the new sheet is smaller, the sheet no longer covers everything, so a reader is shown less — the rest is still there and comes back on a bigger sheet. Choosing scale to fit instead puts all of it inside the sheet.
Why is my page still landscape on a portrait sheet?
Because it carries a rotation, and this tool keeps it. A PDF page can be stored portrait and marked to display turned by 90 degrees; setting the sheet writes the page’s own box and a reader applies that rotation afterwards. Straightening it is a different operation and the organiser is where it lives — quietly turning your pages here would be a change nobody asked for.
Does this make the PDF smaller?
No, and that was measured rather than assumed. Three real documents were read before this tool was built: a government form that contains no images at all, and two papers whose images are diagrams. Re-encoding the images in the first paper made the file 12% bigger, because deflate already compresses line art better than JPEG does. Only one of the three shrank, and only by halving the resolution of its figures. So this tool changes the sheet and says nothing about the file size.
Where do the A4 and Letter measurements come from?
From the standards that define them, converted rather than typed. A4 is 210 × 297 millimetres in ISO 216 and Letter is 8.5 × 11 inches; a PDF measures in points, 72 to the inch, so A4 comes out at 595.28 × 841.89 and Letter at exactly 612 × 792. The definitions are what this tool stores, and the points are arithmetic on them — which is also why the A series halves to within a millimetre rather than exactly: ISO 216 rounds each size to whole millimetres, so half of A4’s 297 is 148.5 while A5 is defined as 148.