Show HN: Carbon8r – Option+click React elements to open their source (React 19)

Carbon8r, a developer tool that lets users Option+click React elements in the browser to open their corresponding source files, was posted to Hacker News as a Show HN submission on August 19, 2026, per the HN listing by user carboni-rob.

The tool targets React 19 and is aimed at speeding up the workflow of locating and editing component source code during development. Rather than hunting through a file tree or relying on browser devtools, a developer can hold Option and click any element rendered on the page to jump directly to the source.

No pricing, team size, funding details, or company background were included in the HN post. The submission had one point and no comments at the time of indexing.

The React ecosystem has seen a steady stream of developer-experience tools aimed at closing the gap between what renders in the browser and what lives in the codebase. Click-to-source tooling has existed in various forms — including built-in support in some meta-frameworks — but Carbon8r positions itself as a standalone utility for React 19 specifically. No competitors or comparable tools were mentioned in the source material.

The HN post contains no forward-looking statements about a roadmap, broader framework support, or commercial plans.