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Resize PDF pages to A4, Letter or Legal and add print margins.
Resize PDF pages to A4, Letter or Legal and add print margins.
| Size | Millimetres | Inches | Where it is standard |
|---|---|---|---|
| A4 | 210 × 297 | 8.27 × 11.69 | Europe, Asia, Australia |
| US Letter | 216 × 279 | 8.5 × 11 | USA, Canada |
| US Legal | 216 × 356 | 8.5 × 14 | US contracts and legal filings |
| A3 | 297 × 420 | 11.69 × 16.54 | Posters, plans, spreads |
| A5 | 148 × 210 | 5.83 × 8.27 | Booklets, notebooks, flyers |
Dimensions of the sheet sizes this tool supports.
To change PDF page size free: open PDFWix Change PDF Page Size, add your PDF, pick A4, Letter, Legal, A3 or A5, set a margin in millimetres if you want one, and click Resize pages. Every page is scaled to fit the new sheet with its text still selectable.
PDFWix Change PDF Page Size embeds each original page as a vector form XObject with pdf-lib and draws it onto a new page of the target dimensions — A4 (595.28 × 841.89 pt), Letter (612 × 792 pt), Legal, A3 or A5 — scaled by the smaller of the width and height ratios so nothing is cropped. Because pages are embedded rather than rasterised, text remains selectable and searchable and fonts stay embedded. Margins are converted from millimetres at 72 points per inch.
A4 measures 210 × 297 mm and is the standard almost everywhere outside North America. US Letter is 216 × 279 mm: slightly wider and noticeably shorter. Legal keeps Letter's width but stretches to 356 mm for contracts. Because A4 is taller and narrower, converting Letter to A4 leaves a little space top and bottom, while A4 to Letter has to shrink the page slightly to fit the shorter sheet — which is exactly what a printer's "fit to page" setting does, only without your control. Margins are the second half of the problem. Most desktop printers cannot print within roughly 5 mm of the paper edge, so a PDF whose content runs to the very edge loses a sliver. Adding a 10 mm margin here scales the content inwards so it prints intact, and a 20–25 mm margin on the binding side leaves room for a punch or a comb binder. If you would rather trim away existing white space than add more, Crop PDF does the opposite job, and Multiple Pages per Sheet fits several pages onto one sheet to save paper.
Sheet sizes: A4, Letter, Legal, A3, A5, Tabloid · Margin range: 0–40 mm · Text: Stays vector and selectable
Want the opposite? Crop PDF trims existing margins away, Multiple Pages per Sheet saves paper, and Compress PDF shrinks the finished file for email.
Open PDFWix Change PDF Page Size, add the PDF, choose A4, Letter, Legal, A3 or A5 and click Resize pages. It runs in your browser at no cost.
Pick A4 as the new size. Each Letter page is scaled to fit the taller, narrower A4 sheet without cropping.
Yes. Drag the margin slider in millimetres and the content is scaled inwards, leaving a clean white border.
No. Pages are embedded as vectors, so text and lines stay sharp and selectable at any scale.
With the orientation switch on, wide pages stay landscape and portrait pages stay portrait.
No. The whole resize runs inside this browser tab.
Need to trim margins instead of adding them? Crop PDF does that, while Multiple Pages per Sheet fits several pages onto one sheet and Rotate PDF fixes sideways pages.