How Developers Built a Serverless Web App for 100k+ Users Without Any Backend

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A DEV Community article outlines how software engineers built a fully client-side web utility called Tier List Maker that requires no backend, database, or cloud storage. The app uses the HTML5 File API to generate temporary local browser URLs for user-uploaded images, eliminating network latency and privacy concerns around remote file storage. Users can arrange images or text into ranked grid layouts, with the app managing all state locally via React. When ready, the final layout is rendered to a high-resolution PNG using the HTML5 Canvas API and downloaded directly to the user's device. The author argues this client-side-only architecture is inherently scalable, as server load is nonexistent regardless of how many users access the tool simultaneously.

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