Resize PDF files online



Supported image types: PDF documents
Max file size: 200MB. All uploaded files are automatically deleted 1 hour after upload.

When local processing is enabled, files are processed in browser without uploading to a server. Some features may be limited. If you experience issues, leave this unchecked.

Change PDF Paper Size and Image Resolution

This tool resizes PDF documents in two ways: it can move every page onto a different paper size — for example convert US Letter to A4 before printing in Europe, or turn a large poster PDF into printable A4 pages — and it can lower the resolution (DPI) of the images embedded in the document to make the file smaller. You can use either option on its own or both at once.

Changing the Paper Size

  • Standard and custom sizes — choose A3, A4, A5, B5, Letter, Legal, Tabloid, or enter any custom width and height in millimeters.
  • Automatic orientation — with Auto selected, landscape pages are placed on landscape paper and portrait pages on portrait paper, so mixed documents come out right. You can also force all pages to portrait or landscape.
  • Scale to fit — page content is scaled up or down proportionally to fit the new paper and centered on it, so nothing gets cut off or distorted. Choose Don't scale to keep the content at its original size and only change the paper around it.
  • Margins — add a white border so content doesn't touch the edge of the paper, useful for printers that can't print to the edge.

Text, fonts, and vector graphics stay sharp at any size — pages are not converted to images. Page rotation and crop settings of the original document are taken into account. Note that interactive elements like links and form fields are not carried over to resized pages.

Changing the Image Resolution (DPI)

Scanned documents and PDFs exported from design software often contain images at 300-600 DPI or more, which makes them huge. Pick a lower resolution and every image above it is downsampled to the selected DPI based on its printed size on the page. Images that are already below the target resolution are left untouched, and text stays perfectly crisp.

  • 300 DPI — high quality printing.
  • 150 DPI — a good balance for reading on screen, ebooks, and office printing.
  • 72-96 DPI — the smallest file size for web pages and email attachments.

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