Resize every page to A4, Letter, Legal, or A3. 100% free, no sign-up — your file never leaves this browser tab.
Change PDF Page Size lets you change a PDF's page size entirely inside your browser, with no software to install and no account to create. Like every tool on Techsinghge Smart Tools, it's built around adding a finishing touch to a document — text, numbers, images, or metadata, and it works the same way whether you're on a laptop, a Chromebook, or a phone.
Under the hood, Change PDF Page Size takes one PDF file and hands back a PDF resized to A4, Letter, Legal, or A3. Your file is loaded directly into this page's memory using JavaScript — nothing is transmitted to a server, which means there's no upload wait, no file-size cap tied to a paid plan, and no copy of your document left sitting on someone else's storage once you're done.
Converting a us letter document to a4 for international printing is one of the most common reasons people reach for this tool, but it works just as well for resizing a PDF to Legal size to match a filing requirement. If you need a related step before or after this one, check the related tools further down the page — every tool on this site is designed to slot into the same drag-and-drop workflow.
No installs, no accounts — just your browser doing the work.
Scroll up (or tap “Use Change PDF Page Size now”) to load the tool instantly — no account or install needed.
Drag and drop one PDF file into the drop zone below, or click it to browse your device.
Adjust whatever settings this tool offers so the result comes out exactly how you want it — sensible defaults are already selected.
Click Run, then download a PDF resized to A4, Letter, Legal, or A3 straight to your device — it's generated locally and ready in seconds.
Choose from A4, Letter, Legal, and A3 without needing to know exact millimeter dimensions.
Page content is scaled proportionally so nothing gets awkwardly cropped or stretched.
Your one PDF file stays on this device the whole time — nothing is uploaded, logged, or stored on a server.
Processing happens right in this browser tab, so there's no upload progress bar, no server queue, and no processing fee.
Because Change PDF Page Size runs locally, teams handling sensitive paperwork — legal, HR, healthcare admin, finance — can use it without the compliance questions that come with uploading documents to a third-party server. And if you only need it for a single one-off task, it's just as useful with zero setup and nothing to remember to delete afterwards.
Content is scaled proportionally to fit the new page size, preserving the original aspect ratio.
The new size is applied to the whole document for consistency across all pages.
Yes — completely free, with no hidden page limits, no sign-up, and no watermark added to a PDF resized to A4, Letter, Legal, or A3.
No. Change PDF Page Size runs entirely in your browser using JavaScript libraries like pdf-lib and pdf.js. Your one PDF file never leaves this device.
Yes, Change PDF Page Size works in any modern mobile or desktop browser — there's no app to install and no separate mobile version to download.