Orpheus

Resize PDF to A4 or Letter

One paper size throughout, without stretching anything.

Every tool runs entirely in your browser. Your files are never uploaded to a server.

Resizing draws each page onto a new sheet of the chosen size, scaled to fit. The aspect ratio is preserved, so spare space becomes margin rather than the content being stretched.

How to use Resize PDF Pages

  1. Add your PDF. Drag it in or click to browse.
  2. Pick a paper size. A4 and US Letter differ by a few millimetres in each direction.
  3. Choose fit or fill. Fit keeps the whole page; fill covers the sheet and crops the overhang.

About resizing PDF pages

Resizing a PDF means drawing each existing page onto a new sheet of the target dimensions rather than editing the page itself. The content is embedded whole and scaled, so text and vector graphics remain resolution-independent and stay crisp at any size — nothing is rasterised. The decision that matters is what to do when the source and target proportions differ, which they almost always do. Fitting scales until the whole page is inside the sheet and turns the leftover into margin; filling scales until the sheet is covered and pushes the excess off the edge. Fitting is the right default because it never loses content, and a slightly smaller page with a white border is a far less serious outcome than a cropped one. What neither can do is change the proportions without distortion, which is why stretching to fill both dimensions independently is not offered at all. The most common reason to need this is the A4 and Letter mismatch. A4 is 210 by 297 millimetres and US Letter is 216 by 279 — one is narrower and taller, the other wider and shorter, and neither contains the other. A document laid out for one and printed on the other loses an edge or gains an uneven margin, which is why documents crossing between Europe and North America are routinely rescaled before printing. Mixed-orientation documents are handled by matching each source page rather than forcing everything one way.

Frequently asked questions

Will this stretch my pages?
Not with fit turned on, which is the default. The scale is the same in both directions, so the proportions are preserved and any leftover space becomes margin. Fill mode scales to cover the sheet instead, which crops rather than distorts.
What happens to landscape pages?
They go onto a landscape sheet of the same size. Forcing every page to portrait would rotate half of a mixed document into uselessness, so the orientation of each source page is respected.
What is the difference between A4 and Letter?
A4 is 210 by 297 millimetres and US Letter is 216 by 279 — slightly narrower and taller against slightly wider and shorter. The mismatch is why a document laid out for one prints with odd margins or a clipped edge on the other.
Does resizing lose quality?
Text and vector graphics are drawn at the new scale and stay sharp at any size. Embedded images keep their original resolution, so enlarging a page can make a low-resolution scan look softer — the pixels are unchanged, they are simply spread further.
Does this reduce the file size?
Not meaningfully. The page content is the same, just drawn at a different scale, so the file is broadly the same size. Resizing is about paper dimensions rather than bytes.

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