Show HN: OnDevice Tools – 64 browser utilities that never upload your data

Category: devtools

Tags: privacy, browser-tools, angular, static-site, pwa

Score: 6.0/10 (Innovation: 4, Technical: 6, Documentation: 8, Utility: 6)

OnDevice Tools is a collection of 64 client-side browser utilities (formatters, converters, PDF/image tools, calculators) that process data entirely in the browser without uploading anything. It uses Angular 21 with SSR prerendering, a service worker for offline use, and a well-documented build pipeline that generates CSP hashes and static assets. The project is notable for its privacy-first approach and thorough documentation, though the utility category (online tools) is crowded and the innovation is primarily in the combination of existing browser APIs with a polished static site.

Target audience: developers, privacy-conscious users, and anyone needing quick browser-based utilities

Repository: https://ondevice-tools.org/ · TypeScript · AGPL-3.0

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