IndieHandle asks one small question: “Is this handle free?”

Field notes

The checker accepts either a handle or a pasted profile URL, then compares that identity across 22 platforms, including GitHub, npm, X, Bluesky, Reddit, and Hacker News. Its input rules allow letters, digits, dots, underscores, and hyphens, while the page says each platform is read through its own API or profile page. A “Copy check link” control supports sharing a result, and the stated operating model excludes accounts, cards, premium plans, upgrade nags, and public history.