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Convert PDF to A4, Letter, or Legal Online (Free Paper Size Tool)

Updated 2026-08-11 · pdf paper size converter

Convert PDF to A4, Letter, or Legal Online (Free Paper Size Tool)

A client in Europe asks for A4. A US court filing needs Legal. Your school portal only accepts Letter. The content is fine — the paper size is wrong. A pdf paper size converter fixes that without redesigning the document from scratch.

People searching for convert pdf to a4, a4 to letter pdf, or legal to letter pdf usually need a quick online step before print, upload, or email. CashPilot’s Paper Size Converter remaps each page onto A4, Letter, or Legal in the browser.

Before you email the result, open it once on the device your recipient uses. Check that headers, footers, and page numbers still look right — especially if you used Fill mode. Privacy matters: upload only files you are allowed to process online, and keep your master original offline.

A4 vs Letter vs Legal (quick sizes)

Size	Dimensions	Common use
A4	210 × 297 mm	Most countries outside the US
Letter	8.5 × 11 in	US schools, offices, many portals
Legal	8.5 × 14 in	US legal / longer forms

Letter and Legal share the same width. Height is where Legal is longer — that matters for Fill mode (see below).

Fit vs Fill — choose correctly

Fit (recommended for most files)

Scales the page to fit inside the new size. Nothing is cropped. You may see white margins if the aspect ratio differs.

Fill

Scales to cover the new page. Edges may be cropped so the sheet looks full.

Critical case: Legal → Letter with Fill

This is mathematically correct but content-risky:

Width is identical (8.5 in), so Fill does not shrink width.
Height drops from 14 in to 11 in (3 in total).
The tool center-crops roughly 1.5 in top + 1.5 in bottom.
Titles and headers near the top edge can disappear.

CashPilot shows a warning for Letter + Fill. Prefer Fit when converting Legal documents to Letter if you need every line preserved.

Good situations for this workflow

Changing a scanned contract from Letter to A4 for international print.
Preparing US Legal PDFs for Letter-only upload portals.
Matching printer trays or university submission rules.
Standardizing a mixed batch of PDFs before merge.

How to convert PDF paper size online (step by step)

Open Paper Size Converter and upload your PDF.
Choose the target size: A4, Letter, or Legal.
Choose Fit (keep all content) or Fill (may crop edges).
Click Convert, then Download PDF.
Open the file and check first/last pages, headers, and margins.
Rename clearly, for example Contract-A4.pdf.

If anything fails, check file size (free tier ~20 MB for documents) and try a smaller export.

What to expect from the output

Same page count and order as the source.
Each page’s media size matches A4, Letter, or Legal.
Fit may add letterboxing; Fill may crop.
Free, browser-based — no Adobe install for typical files.

Always review the download before sending it to a client, court, or school portal.

Extra tips for better results

Use Fit when text near edges matters (letterheads, stamps, page numbers).
Unlock password-protected PDFs first if your tool requires it.
For print shops, confirm whether they want A4 or Letter trays before converting.
After resize, run a quick print preview at 100% zoom.

When not to rely on online conversion

When you must redesign layout, fonts, or margins by hand in InDesign/Word.
When Fill crop would remove seals or signatures near the edge — use Fit or redesign.
When the file is encrypted and you are not authorized to unlock it.

Common questions answered

Is CashPilot’s PDF Paper Size Converter free?

Yes. The Paper Size Converter on CashPilot Free Tools is free for typical PDFs with no account required for the standard free-tier flow. Document uploads typically work best under roughly 20 MB on the free tier. Always open the result once before you send it.

What paper sizes can I convert to?

A4 (210 × 297 mm), US Letter (8.5 × 11 in), and US Legal (8.5 × 14 in).

What is the difference between Fit and Fill?

Fit scales the page so all content stays visible (may add white margins). Fill scales to cover the target page and may crop edges.

Why does Legal to Letter Fill crop my title?

Legal and Letter share the same width (8.5 in) but differ by 3 inches in height. Fill uses scale 1.0 and center-crops about 1.5 in from top and bottom, which can remove headers. Use Fit mode to keep all content.

Will text stay searchable after changing paper size?

Yes for normal text PDFs — the tool remaps pages onto the new size without OCR. Scanned image-only PDFs remain image-based.

Can I convert a multi-page PDF?

Yes. Every page is converted to the chosen target size in the same order.

Do I need Adobe Acrobat?

No. Convert online in the browser with CashPilot — no Acrobat install required.

Where do I open the PDF Paper Size Converter?

Use the tool buttons on this page, or go directly to /paper-size on CashPilot Free Tools.

Still stuck? Open Paper Size Converter and retry with Fit mode on a short test PDF first.

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