How do I convert a Letter PDF to A4?

Add the PDF, choose A4 and Fit, then download. Every page is scaled to fit A4 and centred. Letter is slightly wider and shorter than A4, so Fit leaves thin white bands; choose Fill if you prefer no white edges.

Will the text become blurry?

No. Pages are placed as vector graphics, not converted to images, so text stays sharp at any zoom and can still be selected and searched.

Does this make my PDF smaller in KB?

No. Changing the page size changes the paper dimensions, not the file size. Use Compress PDF or Compress PDF to Size for that.

Can I change only some pages?

Yes. Enter a page range such as 1-3, 7. Other pages are left exactly as they were.

What happens to links, comments and form fields?

They sit on top of the page rather than in it, so they can't move with the content and are removed from the pages you change. The tool warns you first. Flatten the PDF beforehand to keep form answers and stamps as part of the page.

No. The PDF is read, changed and previewed in your browser. It is never sent to a server.

Change PDF Page Size

Put every page of a PDF on A4, Letter, Legal, A3, A5 or a size you choose. Content is scaled and centred as vector graphics, so text stays sharp and selectable. Everything happens in your browser.

Loading PDF tool...

Will this work for my PDF?

Letter, Legal or odd-sized pages that must be A4 (or the reverse)

Every page, or a range, is scaled onto the new size and centred. Text stays vector.

Mixed page sizes, rotated or cropped pages

Each page is placed upright as your viewer shows it; automatic orientation matches landscape pages to landscape paper.

A fillable form or a PDF with comments

Form fields, comments and links are removed from changed pages. Flatten first to keep answers on the page.

Flatten the PDF

Making the file smaller in KB or MB

Page size and file size are different things.

Compress to an exact size

Password-protected PDFs

Remove the password first, then change the page size.

Unlock the PDF

Features

A4, Letter, Legal, A3, A5 or a custom size in mm
Fit (whole page visible), fill (no white edges) or actual size
Automatic orientation: landscape pages go on landscape paper
Margins in mm, and a page range to change only some pages
Rotated and cropped pages come out upright, as you see them
Live preview, and text stays vector and searchable

When you need a different page size

Portal uploads

Government, exam and job portals often accept only A4. Convert Letter or odd-sized PDFs first.

Printing

A US Letter document printed on A4 gets cut off or shrunk unevenly. Convert it so it prints cleanly.

Scans and phone PDFs

Scanners and apps produce odd page sizes. Put every page on the same paper size.

Choosing the right options

Fit, fill or actual size?

Fit shows the whole original page, scaled down or up. Letter to A4 leaves thin white bands at the top and bottom, because the shapes differ.
Fill scales until the new page is covered, so there are no white edges, but a little of the original edges is trimmed.
Actual size keeps 100% scale and centres the page. Use it to put a small page on bigger paper without enlarging it.

Page size is not file size

This tool changes the paper dimensions (A4, Letter). It does not make the file smaller in KB or MB. For that, compress the PDF or compress it to an exact size like 100 KB or 200 KB.

Related tools

Trim white margins or a scanner border: Crop PDF.
Pages sideways or upside down: Rotate PDF.
Several pages on one sheet: Pages per Sheet.
Fillable form? Flatten it first so the answers keep their place.
Photographing paper documents? Scan to PDF straight to A4.