How to Resize a PDF to A4 Size Online
Step-by-step guide to adjusting PDF page dimensions to international standard ISO A4 (210 x 297 mm) with zero margin distortion.
Step-by-Step Instructions
Follow these straightforward steps using ToolTower's free browser tools:
1. Open Resize PDF Pages in ToolTower
Navigate to ToolTower Resize PDF Pages. Select your document from your computer or mobile device.
2. Choose Standard A4 Page Dimensions
Select 'A4 (210 x 297 mm / 8.27 x 11.69 in)' from the page presets dropdown. You can also pick Portrait or Landscape orientation.
3. Choose Scaling & Centering Mode
Select 'Fit to Page' with proportional aspect ratio preservation so content is centered without being stretched or clipped.
4. Apply & Download
Click 'Resize Pages' and download your uniformly formatted A4 PDF ready for commercial printing or official submissions.
- Always preview margins to ensure legal document borders or letterheads are not trimmed.
- When combining documents from different sources (e.g. US Letter and Legal), batch-resizing them to A4 ensures consistent printing.
What is the difference between US Letter and A4?
US Letter is 215.9 x 279.4 mm (wider and shorter), while A4 is 210 x 297 mm (narrower and taller). ToolTower scales proportional margins to fit A4 perfectly.