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Developer builds dependency-free unit converter with 70+ units and 165 tests

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A developer has released a browser-based unit converter that runs entirely client-side with no external dependencies, no ads, and no server communication. The tool covers seven categories — length, weight, temperature, volume, area, speed, and data — supporting over 70 units in total. It features real-time bidirectional conversion, a swap button, an all-units panel, and a formula display showing conversion factors. The project is packaged as a single HTML file requiring no build tools or package manager. Reliability was a key focus, with 165 automated tests written using only Node.js's built-in assert module, covering edge cases, roundtrips, and known reference values.

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Developer builds dependency-free unit converter with 70+ units and 165 tests · ShortSingh