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 expand each page's visible page box outward by your margins — 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 add margins to my PDF?

Pick a PDF with the file selector, type the amount of white space you want in millimetres for the top, right, bottom, and left sides, then press the add button. The padded PDF is built in your browser and offered as a download right away.

Do the margins apply to every page, or can I set different values per page?

The top, right, bottom, and left values you enter are applied uniformly to every page in the document. There is no per-page control, so if pages have different sizes each one still grows by the same millimetre amounts you specify.

Is there a maximum margin I can add to each side?

Each side accepts up to 500 mm, and at least one side must be greater than zero or the tool will ask you for a margin. Values are entered in millimetres and converted to PDF points internally, so the page simply grows outward while the existing content keeps its original size and position.

Does the Add Margins to PDF tool cost anything to use?

Adding white space around your PDF pages — whether for binding edges, hole punching, or annotation room — is completely free, requires no account or sign-up, and it always will be, no matter how many documents you process. Every margin adjustment runs entirely inside your browser using pdf-lib, so your files stay on your device and are never sent anywhere.

Add White Margins to a PDF Privately — In Your Browser

Select a PDF and enter top, right, bottom, and left margins in millimetres; every page grows by that amount of white space and the result downloads locally from your browser.

Quick answer

What it does: Select a PDF and enter top, right, bottom, and left margins in millimetres; every page grows by that amount of white space and the result downloads locally from 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: Add a wide left margin to a report before printing and binding so text near the spine is not hidden in the gutter.
Good to know: Margins enlarge the page size; printing at 'actual size' on the same paper may scale content down slightly.

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 the top, right, bottom, and left margins to add, in millimetres.
pdf-lib enlarges each page's visible area outward — the existing content keeps its size and position.
The padded PDF is offered as a download directly from your browser.

When to use this tool

Add a wide left margin to a report before printing and binding so text near the spine is not hidden in the gutter.
A student adds blank padding to the right side of a PDF textbook to leave room for handwritten notes alongside the text.
An office adds a 15 mm left margin to reference pages before hole-punching them to keep all content clear of the holes.
Adding margins enlarges page dimensions, so printing at actual size on the same paper may shrink the content slightly.

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 expand each page's visible page box outward by your margins — 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 add margins to my PDF?: Pick a PDF with the file selector, type the amount of white space you want in millimetres for the top, right, bottom, and left sides, then press the add button. The padded PDF is built in your browser and offered as a download right away.
Do the margins apply to every page, or can I set different values per page?: The top, right, bottom, and left values you enter are applied uniformly to every page in the document. There is no per-page control, so if pages have different sizes each one still grows by the same millimetre amounts you specify.
Is there a maximum margin I can add to each side?: Each side accepts up to 500 mm, and at least one side must be greater than zero or the tool will ask you for a margin. Values are entered in millimetres and converted to PDF points internally, so the page simply grows outward while the existing content keeps its original size and position.
Does the Add Margins to PDF tool cost anything to use?: Adding white space around your PDF pages — whether for binding edges, hole punching, or annotation room — is completely free, requires no account or sign-up, and it always will be, no matter how many documents you process. Every margin adjustment runs entirely inside your browser using pdf-lib, so your files stay on your device and are never sent anywhere.