URL Shortener

A lightweight URL shortening service built using Node.js, Express, MongoDB, and Mongoose.
It generates unique short IDs for long URLs and redirects users efficiently using dynamic routing.

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Tech Stack

• Node.js
• Express
• MongoDB
• Mongoose
• nanoid

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Features

• Generate unique short URLs using nanoid
• Store URL mappings in MongoDB
• Dynamic route-based redirection
• Unique constraint enforcement at database level
• Basic error handling for invalid short IDs
• Minimal UI for testing functionality

Architecture Overview

1. User submits a long URL via form
2. Backend generates a 6-character short ID
3. Mapping is stored in MongoDB
4. Visiting /:shortID performs a database lookup
5. If found -> server responds with HTTP redirect
6. If not found -> returns 404 response

API Endpoints

• GET / → Serves UI
• POST /shorten → Creates short URL
• GET /:shortID → Redirects to original URL

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Project Structure

.
├─ config/
├─ controllers/
├─ models/
├─ routes/
├─ index.js
├─ index.html

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Author

© 2026 Saptaparno Chakraborty.
All rights reserved.

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