Username Checker
Check whether a username is taken on GitHub, GitLab, Docker Hub, Mastodon, Bluesky and other platforms.
Continue your work
- Domain Availability Checker — Check the matching domain name.
- Random Name Generator — Get name ideas.
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Clear instructions
Find steps, examples and limitations below.
Use online
Open the tool in a supported web browser.
Free to use
No sign-up required. Tool-specific limits may apply.
How to use the Username Checker
Check whether a username is taken on GitHub, GitLab, Docker Hub, Mastodon, Bluesky and other platforms.
- 1 Enter the username you want.
- 2 Click Check username and watch the results appear.
- 3 Grab the available names quickly, and open taken profiles to see who has them.
Example and practical tips
Before launching a project called “hivekit”, check that the same handle is free on GitHub, npm-style registries and social sites so your brand is consistent.
Frequently asked questions
Why are only some platforms included?
Only platforms with a public API that clearly says whether a name exists are checked, so results are not guesses.
What does “Could not check” mean?
The platform did not answer or limited our requests. Try again later or check the site directly.
Report an issue
Something broken or not quite right? Tell us and we will look into it.