Free · Private · In your browser

Resize PDF

Change every page to A4, Letter, Legal, or custom dimensions.

Drop your files here, or click to browse
Processed on your device — nothing is uploaded

How your files are handled

We built these tools so you never have to wonder where your documents go. Here is exactly what happens when you use them.

  • Your files are processed entirely in your browser using open-source libraries (pdf-lib, PDF.js, and others).
  • Nothing is uploaded to our servers. We have no backend that receives, stores, or scans your documents.
  • We cannot see, store, or access your files — not during processing, not after, not ever.
  • Processing uses your device's memory and CPU. Large files may take longer, especially on phones and tablets.
  • All tools are free with no paywall tricks, no hourly task limits, and no watermarks on your output files.

How it works

Three simple steps. Your files never leave your device, and the result downloads straight to your computer or phone.

Frequently asked questions

Common questions about privacy, pricing, and how these tools work.

More edit tools

Other free PDF utilities that work the same way — private, in-browser, no sign-up.

How to resize PDF

Resize PDF changes the page dimensions of your document to a standard size like A4 or Letter, or to custom measurements. Your content is scaled and centered to fit the new page.

  1. Add your PDF; pages are embedded on your device without uploading.
  2. Pick a preset size (A4, Letter, Legal, A3, or A5) or enter a custom width and height.
  3. Click Resize PDF to scale each page onto the new size.
  4. Preview the result and download the resized PDF.

Everything happens in your browser — your file is never uploaded, and there is no sign-up, watermark, or limit.

Frequently asked questions

Are my files uploaded to a server?

No. Every tool runs entirely in your browser using open-source libraries, so your file is processed on your own device and is never uploaded. We have no backend that receives, stores, or scans your documents.

Is it really free, and will there be a watermark?

Yes. There is no account, no sign-up, and no hourly limit, and the tools never add a watermark to your output. UnboundPDF is free and is not affiliated with Adobe.

Does it work on a phone or tablet?

Yes. The tools run in any modern mobile browser as well as on desktop. Because the work uses your device's own memory and processor, very large files simply take longer on phones.

Does resizing blur my text?

No. Pages are embedded as vectors and scaled, not re-rendered as images, so text and lines stay sharp at the new size.

What if the new size has different proportions?

Your content keeps its aspect ratio and is scaled to fit and centered on the new page, so nothing is stretched.