LAYOUT TOOL

Change PDF Page Size

Standardize your PDF documents into universal paper dimensions such as A4, US Letter, Legal, A3, and A5. Choose portrait or landscape orientation, adjust margins, and scale content proportionally to prevent clipping.

HOW TO USE

Step-by-step guide

Step 1: Select the PDF whose page dimensions you want to change.
Step 2: Choose your target standard paper size (A4, Letter, Legal, A3, A5) and orientation.
Step 3: Set content fitting (Fit proportionally, Center, or Stretch) and click "Change Page Size".

FAQ

Frequently asked questions

What paper sizes are supported?

We support international ISO standard sizes (A3, A4, A5) as well as North American standards (US Letter, Legal, Tabloid, Executive).

Will my text and images get distorted?

By default, the tool uses proportional scaling ("Fit inside") with automatic centering, ensuring your content preserves its original aspect ratio.

Can I convert a landscape document to portrait?

Yes. You can keep the original orientation or force all pages into portrait or landscape mode.

PRIVACY & SECURITY

Client-side in-memory processing

PDF Toolbox is engineered with a strict browser-first architecture. All file operations execute entirely in your local browser sandbox via modern WebAssembly and JavaScript engines. No file bytes or sensitive document data are ever uploaded, buffered, or stored on external servers or cloud infrastructure. Memory buffers are cleared immediately when you finish or close your tab.

🔒 Zero server uploads: Processing stays on your device ⚡ Instant execution: No network upload/download queues 🛡️ Private & Confidential: Safe for legal, medical & financial files