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tech 11 June 2026

Show HN: Extend UI – Open-source UI Kit for Modern Document Apps

Extend UI is an open-source UI kit designed for modern document apps. It simplifies the integration of React components for handling PDF, DOCX, XLSX, and CSV files, with advanced features like bounding box citations and e-signatures.

Article inspired by the original source
Show HN: Extend UI – open-source UI kit for modern document apps ↗ www.extend.ai

Introduction

In a world where document management applications are crucial, integrating effective and modern user interfaces becomes paramount. Extend UI, an open-source user interface kit, offers a comprehensive solution for developers looking to enhance their applications with advanced document features.

What is Extend UI?

Extend UI is an open-source user interface kit specifically designed for modern document applications. It provides ready-to-use React components to handle various file types like PDF, DOCX, XLSX, and CSV. These components are equipped with advanced features such as bounding box citations, file uploads, and e-signatures. The source code is available on GitHub, allowing for customization and community contribution.

Key Features

Document Management Components

  • PDF Viewer: Allows displaying PDF documents directly in the application with navigation and zoom options.
  • DOCX and XLSX Viewer: Facilitates viewing and interacting with Word and Excel files.
  • Bounding Box Citations: Allows marking specific sections of documents for precise references.

Advanced Integration Tools

  • File Upload: A simple interface for users to upload documents into the application.
  • E-Signature: Integrates a secure electronic signature feature for documents, essential for legal and commercial transactions.

Real-world Use Cases

In a world where digital transactions and documentation are ubiquitous, Extend UI finds its place in various sectors:

  • Enterprises: For managing internal documents, contracts, and legal documentation.
  • Education: Enables institutions to display and manage educational documents.
  • Healthcare: Simplifies the management of electronic medical records.

Why Choose Extend UI?

Flexibility and open source are at the core of Extend UI. Developers appreciate the ability to customize each component according to the specific needs of their project. Moreover, the easy integration into existing workflows significantly reduces development time.

Conclusion

Extend UI represents a significant advancement in creating modern document management applications. With its customizable components and advanced features, it stands out as an indispensable tool for developers focused on efficiency and innovation.

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Extend UI open-source UI kit document apps React components
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