Drag & drop PDF to preview
Load and read any PDF document locallyPrivacy Secured: This utility runs 100% inside your browser. No files, logs, or values are uploaded to any server. Your information stays safe on your device.
About PDF Preview
The PDF Preview tool is a secure web-based PDF viewer that lets you read and navigate PDF documents directly in your browser. Opening a PDF on a device without a native PDF viewer can be frustrating. Our tool provides a clean interface with zoom controls, page navigation, and fit-width adjustments, rendering everything locally to keep your private documents secure.
How it Works
Simply upload your PDF file. The browser loads the document in memory and renders the first page onto a canvas element. Use the zoom-in (+), zoom-out (-), and page navigation buttons to read through the document. The pages are rendered dynamically as you navigate, ensuring a smooth and responsive reading experience.
Key Features
- Page-by-Page Navigation: Browse pages using simple controls.
- Zoom Controls: Zoom in and out to read fine print.
- Client-Side Rendering: Load and preview PDFs without uploading them.
- No Install Required: Works in any modern web browser.
Technical Details
The previewer dynamically imports `pdfjs-dist` and loads the document. It listens to page index and zoom scale changes in a React useEffect hook. On change, it fetches the page object, calculates the viewport matching the scale, adjusts the canvas dimensions, and renders the PDF page vector lines to the canvas context.