# Letter ↔ A4

> Resize PDF pages between US Letter and ISO A4 dimensions with proportional scaling. The file is not uploaded.

- **URL**: https://toolioz.com/pdftools/letter-to-a4
- **Category**: pdftools
- **Privacy**: 100% Client-Side In-Browser. No data or files are sent to any server.

## How to Use
1. Choose a PDF file.
2. Select the conversion direction (Letter to A4 or A4 to Letter).
3. Download the resized PDF with balanced margins.

## Practical Example
Convert US Letter specifications to standard international A4 format before sharing with overseas colleagues.

## Limitations
Pages are scaled proportionally without distortion. Small margin width adjustments may occur.

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Toolioz — Free client-side tools and calculators. [View tool online](https://toolioz.com/pdftools/letter-to-a4)