Resize PDF to A4
Turn US Letter, Legal or any other page size into A4 for printing in the UK, Europe and most of the world. A4 is already chosen.
- Free to use
- Works on any device
- Stays on your device
- A4, A3, A5, Letter or Legal
- Proportions kept by default
- Or stretched to fill the page
- Every page resized
Change your PDF's pages to A4
A4, Letter, Legal and more · one PDF or many at once · your files stay on your device and are never uploaded
Drag & drop files here
or choose a file from your device
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How it works
Resize PDF to A4 in three steps
Choose your PDF
Drop it in. Several PDFs can go in together and come back as a ZIP.
A4 is already chosen
Portrait and Keep proportions are set too. Switch to landscape for wide pages.
Download
Every page is now A4. The file is resized on your device and never uploaded.
Other sizes to A4: what our tests showed
Real PDFs in each starting size, resized on this page with Keep proportions, then measured. Measured on October 21, 2026.
| Starting page | Size | Content scaled to | White space added |
|---|---|---|---|
| US Letter | 8.5 × 11 in | 97.3% | 12.6 mm at the top and at the bottom |
| US Legal | 8.5 × 14 in | 83.5% | 14.9 mm at each side |
| A5 | 148 × 210 mm | 141.4%, made bigger | Under 1 mm: it fills the sheet |
Each test page had a frame drawn half an inch inside its edge, so we could measure exactly where the content landed on the new sheet. The content is always centered.
Letter becomes A4 with almost no visible change. Legal pages are long and narrow, so they shrink to about 84% and gain side margins; check small print. Smaller pages such as A5 are scaled up to fill A4, which is what you want for printing a booklet page full size.
Why A4 matters when you print
Most of the world prints on A4. A Letter-size PDF printed on A4 paper either loses a strip at the bottom or prints with odd margins, depending on the printer. Resizing the PDF first puts every page on the right sheet, so it prints the same everywhere. Our post on A4 and Letter explains why a PDF can print wrong in the first place.
Read next: A4 vs Letter: why your PDF prints wrong · Convert PDF to Letter size
Frequently asked questions about Resize PDF to A4
How do I change a PDF from Letter to A4?
Choose the PDF here; A4 is already selected. Each Letter page is placed on an A4 sheet and scaled to fit, keeping its proportions. In our test the content came out at 97% of its size, with a little extra white at the top and bottom.
Will the text get smaller?
Slightly, from Letter: to 97%, which you will not notice. From Legal it shrinks more, to about 84%, because Legal is much longer than A4. A smaller page such as A5 is made bigger to fill the sheet.
Should I choose Keep proportions or Stretch?
Keep proportions. Stretch fills the sheet exactly but makes letters and photos a little taller or wider than they should be.
What is the size of A4?
210 × 297 mm, or 8.27 × 11.69 inches. US Letter is 8.5 × 11 inches, slightly wider and shorter.
Is my file uploaded?
No. The pages are resized in your browser and the file never leaves your device.
Full step-by-step guide
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