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PDF.js - JavaScript PDF Reader

A powerful open-source JavaScript library developed by Mozilla, enabling rendering of Portable Document Format (PDF) files directly within modern web browsers without relying on native browser support or external plugins. It focuses on performance and accurate rendering.

JavaScript
Added on 2025年7月6日
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PDF.js - JavaScript PDF Reader preview
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Project Introduction

Summary

PDF.js is an open-source project that aims to create a general-purpose, web standards-based platform for parsing and rendering PDFs.

Problem Solved

Traditionally, displaying PDFs in web browsers required plugins (like Adobe Reader) or reliance on inconsistent native browser implementations. This created compatibility issues and a poor user experience. PDF.js solves this by providing a robust, purely web-based solution for PDF display.

Core Features

Client-Side PDF Rendering

Renders PDF pages as images or vectors using HTML5 Canvas, providing high fidelity.

Text Selection and Extraction

Allows selection and extraction of text content from PDF documents within the browser.

Integrated Viewer Application

Includes a built-in viewer application demonstrating the library's capabilities and providing a ready-to-use solution.

Asynchronous Processing with Web Workers

Utilizes Web Workers to perform CPU-intensive parsing and rendering off the main thread, ensuring a responsive user interface.

Tech Stack

JavaScript
HTML5 (Canvas)
CSS3
Web Workers

Use Cases

PDF.js can be integrated into various web-based applications and platforms where displaying PDF content is required.

Inline PDF Display in Web Applications

Details

Embedding PDF documents directly within a web page or application interface, providing a seamless user experience.

User Value

Avoids forcing users to download PDFs or rely on browser plugins, keeping them within the application context.

Custom Document Viewer Development

Details

Building custom document viewers with specific features like annotations, form filling, or collaboration tools, using PDF.js as the rendering engine.

User Value

Provides a flexible foundation for creating tailored PDF viewing experiences beyond basic display.

PDF Previews

Details

Displaying previews of uploaded PDF files in document management systems or email clients before opening or downloading.

User Value

Allows users to quickly glance at document content without a full download, saving time and bandwidth.

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