Protect the integrity of your documents with a SHA-256 based verification hash

🚀 Overview

HashProof is a lightweight, open-source webapp tool that allows users to generate SHA-256 hashes for digital PDF documents while ensuring maximum privacy.

Unlike other verification tools, HashProof does not store any files—everything happens in memory, making it a secure and privacy-respecting solution.

🧠 Why HashProof?

In a digital era where document integrity is critical, ensuring that a file remains unaltered is essential. Traditional solutions often store files in a database or process them in external servers, potentially exposing sensitive information.

HashProof offers a privacy-first approach by generating the cryptographic fingerprint on the fly without storing or logging user data.

🧪 How It Works

1. Upload a document (PDF format, up to 10MB).
2. Generate its SHA-256 hash, a unique fingerprint.
3. Copy the hash to your clipboard for secure storage or verification elsewhere.

📚 Features

	Description
✅	Drag & Drop File Upload for a seamless experience.
✅	Real-Time SHA-256 Hash Generation with an asynchronous API.
✅	No File Storage—documents are never saved, ensuring user privacy.
✅	Easy copy to clipboard to keep your hash wherever you need.
✅	Modern UI with Angular for a smooth user experience.
✅	Fast & Scalable Backend using NestJS, Supabase (PostgreSQL), and Railway.
✅	Deployed with Vercel (Frontend) & Railway (Backend) for high availability.

🧭 Installation

1. Clone the Repository

   git clone https://github.com/rmardonesa/HashProof.git
   cd HashProof

2. Set Up the Backend

   cd backend
   npm install
   

3. Create .env file in the backend directory and add the following

   DATABASE_URL=your_supabase_postgres_url
   PORT=your_port
   

4. Run the backend

   npm run start
   

5. Set Up the frontend

   cd ../frontend
   npm install
   

6. Run Angular App

   ng serve
   

🧰 Tech Stack and Integrations

HashProof integrates technologies to ensure performance, scalability, and a smooth user experience. Below is a breakdown of the stack:

Category	Technology	Description
Frontend Framework	Angular	Provides a component-based architecture for a dynamic and interactive UI.
Frontend Styling	SASS	Used for styling and customizable themes with powerful CSS features.
Front/Back Language	TypeScript	Ensures strongly-typed code and maintainability in both frontend and backend.
Backend Framework	NestJS	Provides a scalable, modular backend built on top of Node.js with TypeScript.
Hashing Algorithm	SHA-256	Cryptographic function to generate a unique fingerprint of documents.
Database (SQL)	Postgres	Reliable SQL database for future storage of hash records.
Database Hosting	Supabase	Serverless Postgres with API authentication and seamless integration.
Backend Deployment	Railway	Cloud platform for scaling backend services and API hosting.
Frontend Deployment	Vercel	Fast global deployment of the web app with automatic builds.
Asynchronous Requests	Promises & Async/Await	Ensures smooth non-blocking API communication.
Security & Privacy	No file storage	The system never stores documents, only processes them in memory for hashing.

⚖️ License

This Open Source project is licensed under the BSD 3-Clause License.

🔮 Contributing

Contibutions are welcome! Follow these steps:

1. Fork the Project

2. Create a feature branch:

git checkout -b feature/new-feature

3. Make your changes and commit them

git push origin feature/your-feature

4. Open a Pull Request!

🌎 LIVE DEMO at https://hashproof.vercel.app