Resize PDF Pages - Change Dimensions

Change PDF page dimensions to A4, Letter, Legal, or a custom size. Content is either scaled to fit the new size or kept at original size with adjusted margins.

Change PDF page dimensions to A4, Letter, Legal, or a custom width/height. Two modes: scale-to-fit (content shrinks or grows to match the new page size) or keep-original-size (content stays put, margins adjust around it). Useful when you need to print on a different paper size, match a publisher's submission spec, or normalise mixed-size pages to a uniform layout.

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Related guides

Related Tools

Crop PDF Rotate PDF Compress PDF Merge PDF

How to Resize Pages

1

Upload your PDF

Drag and drop a PDF, or click to browse. The file stays on your device.

2

Pick a target size

Choose A4, Letter, Legal, or a custom width/height. Then choose whether content should scale to fit the new size or stay at original size with adjusted margins.

3

Download the resized PDF

Click Resize. pdf-lib rebuilds the document with the new page dimensions and downloads the result.

On this page

What Resize Pages does

PDFGrover's Resize Pages tool changes the page dimensions of a PDF to a target size — A4, Letter, Legal, or a custom width/height. Use it to standardise a document that came in mixed sizes, or to fit a PDF to a specific printer's paper tray or a publisher's submission spec.

When to resize PDF pages

  • Printing on different paper — an A4 document you need as US Letter (or vice-versa).
  • Submission specs — journals, print shops, or forms that require an exact page size.
  • Normalising mixed sizes — a merged document with A4, Letter, and odd pages, made uniform.
  • Fitting a printer tray — matching the size your hardware actually feeds.

How to resize PDF pages

  1. Upload a PDF — it stays on your device.
  2. Pick a target size — A4, Letter, Legal, or a custom width/height — and a mode (below).
  3. Save — the resized PDF downloads.

The two modes

  • Scale to fit — content is scaled up or down so the layout looks the same, just at the new page size. Best for true "A4 → Letter" conversions.
  • Keep original size — content stays at its original size and the new page dimensions are set around it (extra space becomes margin; oversized content clips at the boundary). Best for standardising mixed-size pages without touching the content.

What it doesn't do

  • Per-page sizes — one target size applies to every page; per-page work needs a desktop editor.
  • Change rendering resolution (DPI) — this changes page dimensions, not pixel density. For a specific DPI, convert via PDF to PNG or PDF to JPG at that DPI.
  • Crop content — to trim margins rather than rescale the page, use Crop PDF.

Limits

  • One file per session, up to 200 MB
  • No re-encoding — output is similar in size to the input

Privacy and file handling

Resize Pages runs entirely in your browser — no upload, no server involvement, nothing retained. The resized file exists only in your tab until you download it. No sign-up, no watermark.

Troubleshooting

  • Content looks stretched — you're on Scale to fit with a different aspect ratio; switch to Keep original size to preserve proportions.
  • Content got clipped — Keep original size clips content larger than the new page; use Scale to fit instead.
  • Only want to trim white space — that's Crop PDF, not resize.

Frequently Asked Questions