Convert A4 to Letter PDF Online Free
Resize international A4 documents to standard North American US Letter (8.5 × 11 in). Proportional scaling preserves margins and headers offline.
Drag & drop your PDF file here, or click to browse
Drop your A4 PDF here to instantly resize to US Letter (8.5 × 11 in)
Max file size: 50MB
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Upload a PDF file to customize page dimensions and configure scaling.
A4 vs. US Letter: Exact Dimensional Specs
Understand the physical paper proportions before printing or sharing
A4
US Letter
How to Convert A4 to US Letter PDF Without Cutting Off Margins
Converting international A4 documents to North American US Letter is one of the most common document formatting tasks. A4 paper is 17.6 mm (0.69 in) taller than US Letter, but US Letter is 5.9 mm (0.23 in) wider. Without proportional scaling, US office printers will truncate footers, page numbers, and signature blocks.
Upload A4 Document
Drag and drop your file above. Multi-page documents and files up to 50MB are processed instantly inside your local browser memory.
Target Standard: US Letter
The resizer automatically locks to US Letter (215.9 × 279.4 mm). You can inspect page layout using the live interactive preview.
Select Fit & Scale
Select Fit & Scale (Proportional) to resize content with balanced margin padding, preventing office printers from trimming footers or headers.
Instant Client-Side Download
Click "Resize and Download PDF". All text vectors, font types, and image resolutions are preserved with zero quality degradation.
🛠️ Professional Formatting Recommendation
Target Use Case & Industry Standards
Essential for international job seekers submitting resumes to US and Canadian employers, legal applicants filing USCIS immigration documents, and academic researchers submitting manuscripts to North American journals.
Why BrowserPowerToys is the Superior Choice for PDF Resizing
- 100% Private & Serverless: Unlike traditional cloud converter websites, BrowserPowerToys executes all vector transformations directly on your device. Your sensitive financial, medical, and legal documents never leave your computer.
- Crisp Vector Sharpness: We use Form XObject vector scaling rather than converting your pages into blurry bitmap raster images. Text remains crisp at any zoom level.
- Zero Paywalls or Watermarks: Convert unlimited pages and documents with zero watermarks, zero subscription prompts, and zero required account sign-ups.
- Universal Offline Capability: Works fully offline as a Progressive Web App (PWA). No active internet connection needed after initial page load.
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Frequently Asked Questions
Everything you need to know about processing files securely in your browser
Will converting A4 to US Letter cut off my footer or page numbers?
Not when you use Fit & Scale. Our tool proportionally reduces the A4 content to match the 11.0-inch height of US Letter paper, leaving safe margins around the perimeter so no text, footnotes, or page numbers are clipped by office printers.
What is the exact size difference between A4 and US Letter?
A4 measures 210 × 297 mm (8.27 × 11.69 in), whereas US Letter measures 215.9 × 279.4 mm (8.50 × 11.00 in). A4 is taller by 17.6 mm, but US Letter is wider by 5.9 mm.
Why do North American printers cut off international A4 documents?
Standard office printers in the United States and Canada are loaded with US Letter paper. When an unscaled A4 document is printed, the printer attempts to center it or aligns it to the top edge, causing the bottom 0.69 inches (where page numbers and footnotes live) to be cut off entirely.
Will vector text or embedded images lose quality during conversion?
No. BrowserPowerToys uses native PDF Form XObject vector transformations via pdf-lib. Fonts, line vectors, and high-resolution images are scaled geometrically without bitmap rasterization, preserving 100% crispness.
Is my PDF uploaded to any cloud server?
No. The entire conversion runs client-side in your web browser memory via WebAssembly and JavaScript. Zero bytes are uploaded to remote servers, making it 100% compliant with enterprise privacy and confidential document requirements.