PDF HERE.
Your file never leaves this tab.
Everything runs in JavaScript (and WebAssembly) on your device. We can't see your PDF, and neither can our servers — because your file never touches them.
HOW PDF VIEWER WORKS.
01. Drop
Drag your file onto the box, or click to pick one from your device.
02. Tweak
Set the options in the sidebar. Defaults work for most.
03. Download
Hit the big button. Your file is ready in seconds — never leaves your browser.
ABOUT PDF VIEWER.
Sometimes you just need to look at a PDF — quickly, without downloading a dedicated app, without uploading it anywhere, and ideally without your browser's built-in PDF handling doing something unexpected with a file you're not fully sure about yet. minipdftoosz's PDF Viewer renders any PDF directly in the page using pdf.js, the same open-source rendering engine that powers Firefox's native PDF support, giving you page-by-page viewing, zoom, and navigation entirely within the tab.
Because rendering happens through pdf.js's actual PDF interpreter — not a plugin, not a native OS viewer, not an upload-and-preview service — the file never leaves your browser to be viewed. This matters particularly for a quick look at a document you received from an unfamiliar source and want to check out before deciding whether to trust it enough to open with fuller-featured (and potentially more exploit-surface-exposed) desktop software.
Navigation covers what you'd expect from a standard viewer: paging forward and backward through a multi-page document, zooming in to read fine print or examine a diagram closely, and jumping to a specific page directly rather than paging through sequentially. Text rendering follows the PDF's actual embedded fonts and layout, giving an accurate visual representation of exactly how the document is meant to look, not an approximation.
This tool is also a convenient way to sanity-check the output of any other tool on the site before you commit to downloading it — merge two files, then view the result right here to confirm it looks correct, without needing to open a separate application just to verify a quick multi-file merge went the way you expected.
If you're viewing a document specifically to check whether it's safe to open elsewhere, keep in mind that this viewer, like any PDF renderer, is still processing the file's structure to display it — it's a reasonable first look, but for a file from a genuinely untrusted source, exercising the same general caution you would with any unfamiliar attachment remains sensible.
Anyone who wants a quick, no-download look at a PDF — particularly one from an unfamiliar source — uses PDF Viewer, valuing that nothing about the file needs to be uploaded or opened in a separate application just to see what's inside.
Because nothing about viewing requires an account, an upload, or even an internet connection once the tool itself has loaded, it also works reasonably well as an offline PDF reader in a pinch — handy on a device where installing a dedicated PDF application isn't convenient or allowed.
- Use this to preview an unfamiliar PDF before opening it in a fuller-featured desktop application, especially from sources you're not fully certain about.
- Great for a quick sanity-check on another tool's output before downloading — merge or edit, then view the result right here.
- Zoom and page navigation work the same way regardless of document length, from single-page notes to lengthy reports.
FAQ.
Common questions about pdf viewer. Something else on your mind? Ask us.
Yes. Free forever. No sign-up. No credit card. No trial.
Never. Everything runs locally in your browser using JavaScript and WebAssembly.
Only limited by your browser’s memory. Most laptops handle 100MB+ with ease; very large files may be slower.
Once the page and its tool script have loaded, yes — processing runs entirely client-side.