DEV Community
Follow
How I built a 13-tool Micro-SaaS with $0 server costs using React and Web APIs
The author developed ZeroTools, a web application offering 13 utilities that run entirely in the user's browser to avoid server costs and privacy concerns. Traditional SaaS tools for tasks like PDF processing or image manipulation require backend servers and storage, incurring significant expenses and raising privacy issues. ZeroTools bypasses these by leveraging modern web APIs and WebAssembly. Image compression is achieved using the HTML5 Canvas API, allowing files to be processed locally without uploading. For AI-powered background removal, the `@imgly/background-removal` library utilizes WebAssembly, enabling the machine learning model to execute on the user's device. PDF manipulation for compression and metadata stripping is handled by the `pdf-lib` JavaScript library, also operating client-side. The application is built as a static React app using Vite and hosted on Vercel's free tier, resulting in zero hosting costs. This architecture ensures 100% user privacy as no sensitive files are ever sent to a server. The tools offer unlimited usage for users, with processing power being the only constraint. The author invites feedback on this client-side-only architecture and welcomes users to test ZeroTools.
