Browser-based · No Install
PDF Reader Online
Upload any PDF and read it right here — navigate pages, zoom in & out, no software needed
Upload PDF File
Drop your PDF here or click to browse
PDF files only · Processed locally, never uploaded
Page 1 / 1
100%
Upload a PDF above — your pages will appear here
Page Thumbnails
How It Works
▼
1
PDF.js — Mozilla's open-source library that renders PDF files on an HTML5 canvas. No plugins needed — works entirely in your browser.
2
File Upload — The FileReader API reads your file as an ArrayBuffer and passes it to PDF.js, which decodes the document structure.
3
Page Rendering — PDF.js builds a viewport for each page and draws it onto the canvas. A queue system ensures smooth navigation.
4
Thumbnails — Mini previews are generated for every page so you can jump to any page instantly with a single click.
5
Zoom — The + and − buttons adjust the render scale and redraw the current page at the new size in real time.