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Developer builds 109 browser-only tools with zero server uploads or tracking

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A developer has launched korelyy.com, a collection of 109 utility tools that run entirely within the user's browser, requiring no server-side processing or file uploads. The site uses standard web technologies including FileReader, the Web Crypto API, Canvas, and Web Workers to handle tasks like image conversion, hashing, CSV parsing, and PDF generation. Because no data leaves the user's device and nothing is stored locally, closing the browser tab permanently erases all processed information. The architecture is served as static files via Cloudflare Pages, with only two minimal serverless functions used solely for email delivery. After 90 days of operation, the approach has achieved perfect Lighthouse performance scores, though the developer acknowledges the model is unsuitable for features requiring shared state, third-party API secrets, or heavy video processing.

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Developer builds 109 browser-only tools with zero server uploads or tracking · ShortSingh