Resize PDF Pages
Change the PDF page size to A4, Letter, or any custom dimensions — in your browser, with your file never uploaded.
Trying to make the file smaller in MB? You want Compress PDF
Nothing Is Uploaded
Pages are measured, scaled, and rebuilt entirely in your browser. Your document never touches a server — and the tool keeps working offline.
Any Size You Need
A4, Letter, Legal, A3, A5 and more presets — or type exact custom dimensions in mm, inches, or points, or scale everything by a percentage.
You Control the Content
Choose how the content adapts: scale it to fit, keep it at its real size and center it, or stretch it edge to edge. Most tools never let you decide.
Unify Mixed Page Sizes
Merged or scanned documents with pages of different sizes? Pick one target size and every page comes out identical.
TL;DR: Resize PDF pages to A4, Letter, Legal, or any custom size right in your browser. Pick how the content adapts — fit, center, or stretch — and download. This changes the physical page dimensions (mm/inches), not the file size in MB. No upload, no signup, no limits.
Why Change a PDF's Page Size?
Page size problems are quiet until they bite: the A3 plan that your home printer can only mangle, the merged report where pages jump between sizes on every spread, the US Letter contract that arrives in Europe with the bottom line cropped off. The fix is the same in every case — give every page the dimensions the printer, the reader, or the print shop actually expects.
What's different here is where the work happens. The usual online tools upload your document to a server and promise to delete it after 30 minutes to 2 hours. This tool changes the PDF page size entirely on your device: pages are measured and rebuilt by code running in your browser, and the resized file is saved straight to your downloads folder. Nothing is sent, so there is nothing to delete.
Page Size vs File Size: They're Not the Same Thing
Resizing a PDF changes the physical dimensions of its pages — the width and height measured in millimetres or inches. It does not meaningfully change the file size in megabytes; to make a PDF smaller in MB, you compress it instead.
Width × height in mm or inches
The paper dimensions a page prints at: A4, Letter, Legal, or custom. Changing it affects how the document prints and displays — a 2 MB file is still about 2 MB after resizing.
Megabytes on disk
How much storage the PDF occupies. Driven by images and fonts inside the file, not by the paper dimensions. To shrink a PDF for email, compression is the right tool.
Compress PDF →Fit, Center, or Stretch: Three Ways to Resize the Content
Changing the page size forces a decision most tools silently make for you: what happens to the content? Here you choose, and each choice has a clear use:
Fit (recommended)
The content scales proportionally until it fills the new page as far as it can without distortion. Text and vector graphics are scaled mathematically, so nothing blurs.
The default for almost everything — printing, unifying mixed sizes, A4 ↔ Letter.
Center
The content keeps its exact physical size and is centered on the new page. Going bigger adds even white margins around it; going smaller may crop the edges.
Use when physical scale matters — forms, technical drawings, anything measured.
Stretch
The content is stretched independently in width and height to cover the page edge to edge. If the aspect ratios differ, shapes and text visibly distort.
Only for sizes with nearly identical proportions, where edge-to-edge matters more than exactness.
Resize a PDF Without Uploading It
Every mainstream resize tool — Sejda, PDF24, PDF Candy, AvePDF — processes your document on its servers and answers the privacy question with a deletion timer: 30 minutes, 1 hour, 2 hours. That's a promise about what happens after your contract, blueprint, or manuscript has already made the trip.
This tool skips the trip. The PDF is parsed in your browser tab, every page is resized by JavaScript running on your device, and the result is assembled locally. Load the page, disconnect from the internet, and resize the PDF anyway — that's the whole privacy policy, verifiable in ten seconds.
How to Resize a PDF in 4 Steps
- 1
Open your PDF
Drag and drop the file onto the tool above, or click to browse. The pages load locally in your browser — nothing is sent over the network.
- 2
Pick the target page size
Choose a preset like A4, Letter, or Legal; enter exact custom dimensions in mm, inches, or points; or tick the percentage option to scale everything by, say, 50%.
- 3
Choose how the content adapts
Fit scales the content proportionally (the safe default), Center keeps its real size with margins, Stretch fills the page edge to edge. Under Advanced you can also set the orientation or limit the change to certain pages.
- 4
Download the resized PDF
Check the before → after size preview, then click "Resize & Download PDF". A new file is built on your device — the original stays untouched.
Common PDF Page Sizes (and When to Use Them)
Most documents in the world print on a handful of standard sizes. These are the ones you'll actually meet:
| Size | Millimetres | Inches | Typical use |
|---|---|---|---|
| A4 | 210 × 297 | 8.27 × 11.69 | The standard almost everywhere outside North America |
| Letter | 215.9 × 279.4 | 8.5 × 11 | The US and Canadian standard for documents |
| Legal | 215.9 × 355.6 | 8.5 × 14 | US contracts and legal paperwork |
| A3 | 297 × 420 | 11.69 × 16.54 | Posters, plans, and spreadsheets that need room |
| A5 | 148 × 210 | 5.83 × 8.27 | Booklets, flyers, and handouts |
The trickiest pair is A4 and Letter: A4 is slightly narrower and taller, Letter slightly wider and shorter. Print one on the other's paper without resizing and you get cropped lines or lopsided margins — which is exactly why "convert Letter to A4" is one of the most common reasons people change a PDF page size. Their proportions are close, so the Fit option handles the conversion cleanly in either direction.
What You Can Use This For
Six situations cover nearly every reason people resize PDF pages:
Print large formats on a home printer
A3 plans, posters, or ledger spreadsheets won't fit a household tray. Resize to A4 or Letter with Fit and print without cropping.
Unify a document with mixed page sizes
Merging PDFs or scanning with an ADF often produces pages of slightly different sizes that jump around on screen. One target size + Fit makes every page identical.
Convert Letter ↔ A4 for international exchange
Sending US documents to Europe or the reverse? Convert the page size before sending so nothing gets cropped on the recipient's printer.
Meet a print shop's trim size
Self-publishing a 6×9 inch paperback or matching a printer's spec? Enter the exact custom dimensions in inches or millimetres.
Shrink for thrifty printing
Scale everything to 70% and two-up the handout — the percentage mode resizes page and content together.
Adapt pages for tablet reading
A smaller page size can make a dense A4 report far more comfortable on a tablet screen — no pinch-zooming every paragraph.
Browser-Based vs Upload-Based PDF Tools
Every tool that can change a PDF's page size works either on a company's server or on your own device:
| Aspect | This tool (in your browser) | Typical online tools (upload) |
|---|---|---|
| Where your file goes | Never leaves your device | Uploaded to a server |
| Data retention | None — nothing was ever sent | Deleted "after 30 min – 2 h" |
| Content control | Fit, Center, or Stretch — your choice | Usually one fixed behaviour |
| Page range | Resize all pages or just some | Whole file only |
| Account & limits | No account, no task limits | Hourly quotas, size caps on free tiers |
| Works offline | Yes, once the page is loaded | No |
One scope note: if your goal is a smaller file in megabytes — for an email attachment or an upload limit — resizing pages won't get you there. That's a compression job, and the compressor also runs entirely in your browser.
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Frequently Asked Questions
Everything people ask about changing a PDF's page size
How do I change the page size of a PDF?
Open the PDF above, pick a size, download. Choose a preset like A4 or Letter (or enter custom dimensions), decide whether the content should fit, center, or stretch, and click resize. The whole process runs in your browser and takes a few seconds.
Can I resize a PDF without Adobe Acrobat?
Yes — and it's honestly easier without it. Acrobat hides page resizing inside the Crop tool and Preflight fixups, which even long-time users struggle to find. This tool does it in one screen, free, with no installation or account.
What's the difference between resizing and compressing a PDF?
Resizing changes the page dimensions; compressing changes the file size. Resize when the paper format is wrong (A4, Letter, custom). Compress when the file is too many megabytes for an email or upload. They're independent — if you need a smaller file, use the Compress PDF tool.
Will resizing a PDF lose quality?
Text and vector content lose nothing. Page resizing is a mathematical scale, so text, lines, and vector graphics stay perfectly sharp at any size. Only scanned images can look softer when enlarged significantly — shrinking is always safe.
How do I make all pages in a PDF the same size?
Pick one target size with the Fit option. Every page — whatever size it started as — is scaled onto identical pages of the size you chose. This fixes merged documents and scans where page dimensions vary.
How do I convert a Letter PDF to A4 (or A4 to Letter)?
Choose the target size and keep Fit selected. A4 (210 × 297 mm) is narrower and taller than Letter (215.9 × 279.4 mm), but their proportions are close, so Fit converts cleanly in both directions with only hairline margins added.
Does resizing change the file size in MB?
Barely — the megabytes stay roughly the same. Images and fonts inside the file are unchanged, so storage size moves very little. If a smaller download is what you're after, compress the PDF instead.
Why are my scanned pages all different sizes?
Scanners crop each page to what they detect. Sheet feeders and phone scanning apps trim every page slightly differently, so a 20-page scan can contain 20 subtly different page sizes. Run it through this tool with one target size and the document prints and reads like a single, uniform file.
Related PDF Tools
Resizing is often one step in preparing a document. These tools run in your browser too:
- Compress PDF — reduce the file size in MB — the other kind of "resize"
- Rotate PDF — fix sideways pages before resizing
- Add page numbers — stamp clean numbering onto the resized pages
- Merge PDF — combine files first, then unify their page size
- Delete PDF Pages — drop unneeded pages before formatting
Ready to Resize Your PDF?
Free, private, and precise — change the page size to A4, Letter, or any dimensions you need, without your document ever leaving your device.
Resize a PDF Now