Username Checker
Type one username and this checks it on Twitch, GitHub and Bluesky at once, free and without signing in. Each answer comes from the platform's own API, not from loading the profile page, so a banned Twitch channel or a name GitHub keeps for itself does not show up as available. The same name is checked as a .com, .co and .io domain too.
Free, no sign-in, up to 20 checks a minute.
Username rules on each platform
| Platform | Length | Characters | Counts as taken |
|---|---|---|---|
| Twitch | 4 to 25 | Letters, numbers, _ | Any account, banned and suspended included |
| GitHub | 1 to 39 | Letters, numbers, single - | A user or organization, or a GitHub page |
| Bluesky | 3 to 18 | Letters, numbers, - | name.bsky.social resolves to an account |
All three ignore case. A name that breaks a platform's rules is reported as not allowed there without asking it, which is why one name can be fine on Twitch (underscores) and impossible on GitHub.
One checker per platform
- Twitch Username Checker: Is It Available? Banned and suspended channels count as taken. Checks twitch.tv/name and the matching .tv, .gg, .com.
- GitHub Username Checker: Is It Available? Users and organizations share names. Checks github.com/name and the matching .com, .dev, .io.
- Bluesky Username Checker: Is It Available? Your own domain can be your handle. Checks name.bsky.social and the matching .com, .co, .me.
The other 8 platforms
X, Instagram, TikTok, YouTube, Facebook, LinkedIn, Reddit and Medium have no lookup a server can ask for free, so checking them means loading each profile page through a paid unblocking service. Those run on social handle availability, which checks the handle matching your domain on all 11 platforms. Picking a name first? Browse available domain name ideas by niche or see what each extension costs.