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Resize PDF Pages

Change the page size of a PDF so every page matches — A4, A3, US Letter or your own dimensions, portrait or landscape. The pages are rescaled, not re-rendered, and the file never leaves your browser.

Page content is rescaled, not re-rendered — text stays selectable and images keep their resolution. Automatic orientation gives each page the orientation that matches its own shape, so one landscape insert stays landscape. Pages that already match the target size are left untouched.

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A PDF that mixes page sizes looks exactly like what it usually is: a stack of scans and exports stapled together, where one page is Letter, the next is A4, and a landscape table sits in the middle. Printers complain, print settings differ per page, two-pages-per-sheet imposition becomes impossible, and a scanned bundle never looks like one document.

The part that matters is how the scaling is done. The page content — text, images, vector art — is moved and scaled as a whole by writing a transformation into the page, so nothing is re-rendered and nothing is re-encoded. Text stays selectable text, images keep their original resolution, and the file does not get blurrier or much larger. Tools that "resize" a PDF by rendering each page into an image give up all of that.

Two things this tool deliberately does not do. It does not reduce file size — for that, use Compress PDF. And it does not guess: pages that already match the target size are left byte-identical instead of being pushed through a pointless scale of 1.

One detail worth knowing if you cropped pages first. The crop is respected: what gets measured and rescaled is the visible area, not the hidden margin around it, and a clip is written so nothing that was outside the crop can reappear in the new margins.

How to resize pdf pages

  1. Add your PDFDrop one document. Every page is measured against the size you pick.
  2. Pick a target sizeA4, A3, A5, US Letter, Legal, Tabloid, or a custom width and height in millimetres.
  3. Choose orientation and scalingAutomatic orientation matches each page to its own shape. Fit keeps everything visible, Fill crops the overflow, Stretch distorts to fill.
  4. Resize and downloadThe rescaled document is written locally. Pages already at the target size are reported and left untouched.

Frequently asked questions

Does resizing a PDF reduce its quality?
No. Nothing is re-rendered: a transformation is written into the page, so text stays selectable, vector art stays vector, and images keep their original resolution. The page geometry is the only thing that changes.
What does Automatic orientation do?
It gives each page the orientation that matches its own shape — portrait pages get a portrait target, landscape pages get a landscape target. That is normally what you want for a document with one sideways insert. Choose Portrait or Landscape to force every page the same way instead.
What is the difference between Fit, Fill and Stretch?
Fit scales the page until it fits inside the target and centres it, adding white margins where the proportions differ — nothing is cut off, and it is the safe default. Fill scales it until it covers the target, so the overflow falls outside the page and is effectively cropped. Stretch scales width and height independently so the page fills the target exactly, which distorts the content.
How do I change a US Letter PDF to A4?
Pick A4 as the target size and leave the scaling on Fit. Letter is 612 by 792 points and A4 is 595 by 842, so the content shrinks very slightly to fit the narrower width, leaving a small white margin top and bottom. Going the other way — A4 to Letter — enlarges it by the same amount.
Will my form fields and links still line up?
Yes. Annotation rectangles — form fields, links and highlights — are transformed with the page, so they stay where they were relative to the content, and the tool tells you how many pages had them.
Can I resize only some pages?
The tool works on the whole document by design, because normalising page size is the point. If you need a subset, extract those pages first, resize them, then merge them back.
Why did one page not change?
Because it already matched the target size. Those pages are left untouched rather than passed through a scale of 1, which keeps the output as close to the original as possible.
Does the file get bigger?
Only slightly. Each rescaled page gains a transformation and a clip rectangle; no content is decoded or re-encoded. A resized scan is usually within a few kilobytes of the original.

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Every tool on this site runs locally. Read the no upload policy to see how to verify it yourself.