How is this different from other online PDF tools?

Most online PDF tools send your files to a remote server for processing. This tool processes everything locally in your browser using client-side JavaScript. Your files are never transmitted to any server, which means your document content stays entirely under your control.

Are my PDF files uploaded?

No. Your files are read directly by your browser. Your files are never transmitted over the network. The tool works entirely within the browser tab you have open.

Can I verify that files are not uploaded?

Yes. Open your browser's developer tools (F12), go to the Network tab, and watch for any outgoing requests while using the tool. You will see no file data leave your browser. The site may record an anonymous page-view count, which never includes your files and can be disabled.

Does this tool work offline?

Yes, once the page has loaded the tool processes your files entirely in your browser; tool functionality needs no network connection. You can disconnect from the internet and continue using it.

What happens when I refresh the page?

Because nothing is stored on a server, refreshing the page clears your current session. Any files you had selected will need to be selected again.

Does this tool store my files?

No. Files are held in browser memory only for as long as the page is open. Closing or refreshing the page discards them. Nothing is written to disk by the tool, and nothing is sent to a server.

Can this tool unlock password-protected PDFs?

No. This tool does not attempt to remove or bypass PDF password protection. If you know the password, the Unlock PDF tool on this site can remove it locally; then this tool can process the file.

What technologies does this tool use?

This tool uses client-side JavaScript and pdf-lib to scale each page's size and content entirely within your browser — your files never leave your browser.

Does this tool use WebAssembly?

No. This tool uses client-side JavaScript and pdf-lib for local PDF structure editing. No WebAssembly is involved.

How do I scale a PDF by a percentage?

Pick a PDF from your device, type a scale percentage in the box (for example 50 to halve the pages or 200 to double them), then select Scale and save the result. Everything runs locally in your browser, and the saved file is named scaled.pdf.

Does scaling resize the page dimensions, the content, or both?

Both are scaled together by the same factor, so a page set to 150% becomes larger and its text and graphics grow proportionally with it. The original aspect ratio is preserved, so the page does not get stretched or distorted.

What percentage values can I enter, and does the text stay selectable?

You can enter any whole percentage from 1 to 1000; values outside that range are rejected with an error. Because the page is scaled rather than rasterized to an image, the text in your PDF remains selectable and searchable after scaling.

Does the Scale PDF by Percent tool cost anything to use?

Scale PDF by Percent is completely free — no account, no sign-up, and no limit on how many PDFs you resize. It always will be free. Every scaling operation runs entirely inside your browser using pdf-lib, so your PDF never leaves your device; no file data is sent to any server at any point.

Scale a PDF by Percentage Privately — Resize Pages in Your Browser

Select a PDF, enter a scale percentage (e.g. 50 to halve or 200 to double), and download the resized PDF — all processed locally in your browser.

Quick answer

What it does: Select a PDF, enter a scale percentage (e.g. 50 to halve or 200 to double), and download the resized PDF — all processed locally in your browser.
Free?: Yes — 100% free, no account or sign-up.
Files uploaded?: No — everything is processed in your browser.
Works offline?: Yes — once the page has loaded.
Best for: A designer scales a poster PDF to 50% to produce a handout-sized reference copy.
Good to know: Both page size and content scale together; this does not reflow text to a new page size.

How it works

Select a PDF file from your device using the file picker.
The file is read into browser memory — no data leaves your browser.
Enter a scale percentage (1–1000).
pdf-lib scales each page's size and content by that factor, preserving aspect ratio.
The scaled PDF is offered as a download directly from your browser.

When to use this tool

A designer scales a poster PDF to 50% to produce a handout-sized reference copy.
An engineer reduces an A0 technical drawing proportionally to A4 for a meeting summary.
A publisher enlarges a small-format booklet PDF to A4 size for accessibility review.
Both page canvas and content scale together — text does not reflow to the new page dimensions.

Frequently asked questions

How is this different from other online PDF tools?: Most online PDF tools send your files to a remote server for processing. This tool processes everything locally in your browser using client-side JavaScript. Your files are never transmitted to any server, which means your document content stays entirely under your control.
Are my PDF files uploaded?: No. Your files are read directly by your browser. Your files are never transmitted over the network. The tool works entirely within the browser tab you have open.
Can I verify that files are not uploaded?: Yes. Open your browser's developer tools (F12), go to the Network tab, and watch for any outgoing requests while using the tool. You will see no file data leave your browser. The site may record an anonymous page-view count, which never includes your files and can be disabled.
Does this tool work offline?: Yes, once the page has loaded the tool processes your files entirely in your browser; tool functionality needs no network connection. You can disconnect from the internet and continue using it.
What happens when I refresh the page?: Because nothing is stored on a server, refreshing the page clears your current session. Any files you had selected will need to be selected again.
Does this tool store my files?: No. Files are held in browser memory only for as long as the page is open. Closing or refreshing the page discards them. Nothing is written to disk by the tool, and nothing is sent to a server.
Can this tool unlock password-protected PDFs?: No. This tool does not attempt to remove or bypass PDF password protection. If you know the password, the Unlock PDF tool on this site can remove it locally; then this tool can process the file.
What technologies does this tool use?: This tool uses client-side JavaScript and pdf-lib to scale each page's size and content entirely within your browser — your files never leave your browser.
Does this tool use WebAssembly?: No. This tool uses client-side JavaScript and pdf-lib for local PDF structure editing. No WebAssembly is involved.
How do I scale a PDF by a percentage?: Pick a PDF from your device, type a scale percentage in the box (for example 50 to halve the pages or 200 to double them), then select Scale and save the result. Everything runs locally in your browser, and the saved file is named scaled.pdf.
Does scaling resize the page dimensions, the content, or both?: Both are scaled together by the same factor, so a page set to 150% becomes larger and its text and graphics grow proportionally with it. The original aspect ratio is preserved, so the page does not get stretched or distorted.
What percentage values can I enter, and does the text stay selectable?: You can enter any whole percentage from 1 to 1000; values outside that range are rejected with an error. Because the page is scaled rather than rasterized to an image, the text in your PDF remains selectable and searchable after scaling.
Does the Scale PDF by Percent tool cost anything to use?: Scale PDF by Percent is completely free — no account, no sign-up, and no limit on how many PDFs you resize. It always will be free. Every scaling operation runs entirely inside your browser using pdf-lib, so your PDF never leaves your device; no file data is sent to any server at any point.