File Upload REST API (Express + Multer, hardened)

A hardened file upload REST API

A production-grade file upload API built with Express and Multer. Strict MIME whitelist, size and count limits, streaming storage, and full endpoint docs.

What's included

• Strict MIME whitelist — only allowed types
• Size limits — configurable max bytes
• Count limits — max files per request
• Streaming storage — disk + memory modes
• File metadata — name, size, type, url
• Error handling — clean REST errors
• 12 passing tests — node:test suite
• Postman-ready docs — README endpoints

Quick Start

npm install
npm start

Stack

Node.js · Express · Multer

Use cases

• Avatar/asset uploads
• Document submissions
• SaaS file features
• Learning hardened uploads