Uniform Page Size

What is Uniform Page Size?

Uniform Page Size resizes every page in a PDF to a standard page dimension (A4, Letter, A3, or Legal). Pages that are already the target size pass through unchanged. Pages that are larger or smaller are resized and their content is centered on the new page.

The tool uses pdf-lib to set each page's dimensions and translate the content stream so the original content is centered within the new page bounds. If a page is smaller than the target, the content shifts to center it. If larger, the content shifts inward.

The content is not scaled — only the page boundaries and content position change. This means a page larger than the target will have content that extends beyond the new page edges if the original content was close to the original page boundaries.

The content translation uses the formula (newSize - oldSize) / 2 to calculate the offset. This centers the content on the new page. If the original page was wider than the target, the content shifts inward horizontally. If taller, it shifts inward vertically.

How to Use Uniform Page Size

1. Drop a PDF onto the upload zone, or click to browse and select it.
2. Select the target page size: A4 (595.28 x 841.89 pt), Letter (612 x 792 pt), A3 (841.89 x 1190.55 pt), or Legal (612 x 1008 pt).
3. Click Resize. The tool sets every page to the target dimensions and centers the content.
4. A download button appears with your file, named uniform-size.pdf.

Why Use Uniform Page Size?

Documents combining pages from multiple sources often have inconsistent page sizes — a mix of letter, legal, and A4 pages that looks unprofessional when printed or viewed. Standardizing the page size creates a consistent document.

Print shops and commercial printers require documents in a specific page size for their workflows. Resizing to the required standard before submission prevents print errors, scaling issues, and unexpected margins.

PDF archiving standards (like PDF/A) often require consistent page dimensions. Resizing mixed-size documents to a single standard ensures compliance with archival requirements.

Legal document compilers merging filings from multiple courts need consistent page sizes for filing. Different courts may use letter, legal, or A4 — standardizing before submission prevents rejection for formatting non-compliance.

Privacy & Security

Your files never leave your browser. Every step — loading the PDF, resizing pages, centering content, and saving the output — happens on your own device using pdf-lib. Nothing is uploaded to Racira's servers, no copies are stored in the cloud, and no file data is transmitted at any point.

Frequently Asked Questions

Will resizing cut off content on larger pages?

Content is centered, not scaled. If a page is significantly larger than the target size, content near the edges may extend beyond the new page boundaries. For a safer approach, use the Add Margin tool first to create padding, then resize.

Does it preserve bookmarks and annotations?

Bookmarks, links, and annotations are preserved during the resize. Form fields may shift position if they were near page edges, since the content translation affects their coordinates.

Can I resize to a custom page size?

Not with this tool — only the four standard sizes (A4, Letter, A3, Legal) are available. For custom dimensions, use the Add Margin tool to adjust page sizes manually, or use a dedicated PDF editor with custom page size support.

What if some pages are much larger than the target?

Content near the edges of large pages may extend beyond the new page boundaries since only position (not scale) is adjusted. For mixed-size documents, consider adding margins first with the Add Margin tool to ensure content fits within the target dimensions.

Does it handle pages with different orientations?

Each page is resized independently. A landscape page and a portrait page in the same document will both be resized to the target dimensions, but their content orientation is preserved. The tool does not rotate pages.