Change PDF Page Size Online Free – Fit to A4, Letter, Legal

Quick Presets

Presets just set the Target Size + Mode below — nothing is applied until you click "Apply & Download".

1. Target Page Size

210×297mm

Letter

216×279mm

Legal

216×356mm

297×420mm

Custom

Set your own

2. How Should Content Scale?

Fit Content to New Page

Content scales up/down proportionally to match the target page.

Keep Content Size, Add Margin

Content stays exactly the same size — page just gets bigger around it.

Auto-Crop Margins & Maximize

Detects existing whitespace, trims it, and enlarges content to fill the page.

Live Preview

Page 1

Original New Size

Drag the handle to compare.

Change PDF Page Size Online Free — Fit to A4, Letter, Legal, or Custom

Works entirely in your browser. No uploads. No watermarks. No signup.

100%

Free Forever

0 KB

Uploaded to Server

Watermarks Added

Documents don't always arrive in the page size you need. A form scanned as A5, a document from a US printer sized to Letter when you need A4, or a PDF with huge unused margins — all of these are common headaches when printing or sharing files.

QuickPDFonline's Change PDF Page Size tool automatically detects your current page size and suggests the best target size and scale. All processing happens directly in your browser — your files are never uploaded to any server. Choose to scale content proportionally, keep your content exactly as-is with extra margin, or auto-crop excess whitespace to make your content bigger and easier to read.

Whether you're preparing a document for printing on standard paper, converting between regional page standards, or just want more usable space on a lightly-filled page — this tool handles it in seconds, right in your browser.

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ध्यान दें (Helpful Tip)

PDF upload करते ही tool आपके page का current size खुद detect कर लेता है और best target size + scale सुझाता है — बस "Apply Suggestion" दबाएं। अगर आपको किसी specific size (जैसे A4) की ज़रूरत है, तो manually भी चुन सकते हैं। "Auto-Crop" mode उन PDFs के लिए बढ़िया है जिनमें content बहुत छोटा है और बहुत सारा खाली margin है।

How to Change PDF Page Size — 4 Easy Steps

Upload PDF

Your current page size is auto-detected instantly.

Pick a Target Size

Choose A4, Letter, Legal, Custom — or accept the smart suggestion.

Preview Live

Compare before/after with the slider before committing.

Download

Get your resized PDF — no watermark, no sign-up needed.

Frequently Asked Questions

How does the Smart Suggestion work?

The tool reads your PDF's actual page dimensions and matches them against common paper sizes (A4, Letter, Legal, A5, A3). If your page is smaller or non-standard, it suggests a sensible target size and calculates the scale percentage needed to reach it, based on the page area.

What's the difference between the three scaling modes?

"Fit Content to New Page" scales everything proportionally to match your target size. "Keep Content Size, Add Margin" leaves your content exactly as-is and simply places it on a bigger page. "Auto-Crop Margins & Maximize" detects unused whitespace around your content and enlarges just the content to fill the new page.

Does this actually make text bigger, or just the page?

This tool scales the whole page proportionally — text, images, and everything on it get visually larger or smaller together. It cannot enlarge only the text while keeping images and layout the same size, since that would require rebuilding the document's internal text layout rather than simply resizing the page.

Is my file uploaded anywhere?

No. Detection, preview, and the final page-size conversion all happen inside your browser using JavaScript. Your file is never sent to any server.

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