Resize PDF to A4 — Standardize Page Sizes
Turn PDF pages of any size into uniform A4 pages across the whole file, so it prints at the right size.
Got a file with mixed or unusual page sizes? Convert it all to A4. Each page's content is scaled to fit while keeping its proportions, so nothing gets stretched.
How to resize a PDF to A4 (3 steps)
- Open the PDF with non-standard page sizes.
- Click to resize to A4.
- Download the file, with every page the same A4 size.
What happens to each page
A new A4 page is created for every page, in the same orientation (portrait or landscape) as the original. The whole original page is then scaled to fit, keeping its proportions, and centered. Nothing is cut off.
- US Letter, slightly wider than A4 — scaled down a little, with a little extra white space top and bottom.
- A5 or smaller — scaled up to fill A4, so text gets bigger.
- A3 or large drawings — scaled down a lot; check the text is still readable.
- Portrait phone photos (3:4) — fit the width, with a little space top and bottom.
- Long till receipts — fit the height, with wide space left and right.
- Pages already A4 — unchanged.
Why one file has several page sizes
Usually from combining sources: scans are A4, documents from US websites are Letter, and phone photos keep the camera's proportions. Merged, the pages jump between sizes on screen, and the printer scales each page differently, clipping some edges. Making every page the same size first gives a consistent file that prints the same on every sheet.
Common uses
- Submissions that must be A4 — some online systems check page size and may reject Letter or odd sizes.
- Combining document photos with scans — one consistent set before sending.
- Files for a print shop — when everything prints on A4, an A4 file avoids clipped edges.
- Reports from several people — even out everyone's page settings before submitting.
- Long receipts on ordinary paper — an A4 page with the receipt centered.
Good to know before you start
- This is not cropping — to remove white margins, crop first, then resize, so content fills more of the page.
- Very large pages become tiny — A2 or A1 drawings shrunk to A4 are often unreadable; print from the original or split it into several pages.
- Original quality is kept — content is embedded as vector, not images, so text stays selectable and images stay sharp.
- Digital signatures will break — changing page size counts as an edit. Resize first, then sign.
FAQ
Will any content be cut off?
No. The whole page is scaled to fit A4 with its proportions kept.
Does it work with documents photographed on a phone?
Yes, and it suits them well, since photos rarely match a standard page size. As A4 they print neatly.
Are landscape pages supported?
Yes. They become landscape A4.
Can I make every page portrait A4?
Orientation follows the original page. For all-portrait output, rotate the landscape pages with the rotate tool first, then resize.
Are pages that are already A4 changed?
No. Their content is placed exactly as it was, without scaling.
Why is there white space at the sides after resizing?
The original page's proportions differ from A4, and keeping them avoids distortion, so space is left on the shorter side. If the white space came with the original, crop it first, then resize.