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About the developer

520 Stars 42 Forks MIT License 156 Commits 2 Opened issues


This is a opinionated blocklist of words that you might not like to see used as usernames in your service.

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Need anything else?

Contributors list


This is a opinionated blocklist of words that you might not like to see used as usernames in your service (think, or

The editable blocklist can be found in list_raw.txt and is categorized into six sections:

  • Privileges User privilege terms to prevent faked authority. Example: root, super
  • Code: Programming terms that you might want to avoid in a url. Example: void, null
  • Terms: Various technical terms. Example: request, system
  • Financial: This is for the spammers/scammers. Example: payment, invoice
  • Sections: Common website pages and sections. Example: faq, help
  • Actions: User actions. Example: delete, create

You can try the blocklist using the tool Username checker.

Please note that this list does not contain any curse words, there are other lists for that.

How it works

This repro contains standard data files, just pick the format of your choosing.


Blocklist has been ported to different languages.


Third party libraries containing data from blocklist


Want to contribute? Awesome.

  • Checkout the origin/develop branch
  • First edit
  • When you are done, run
    python scripts/
  • ... This script will update the various list files.
  • Done? Send a pull request.

Release start

These hooks will automatically bump the application version when using

git flow release ...
chmod +x $PWD/git-hooks/
ln -nfs $PWD/git-hooks/ .git/hooks/post-flow-release-start
ln -nfs $PWD/git-hooks/ .git/hooks/post-flow-hotfix-start

Git workflow and release management

This project uses gitflow and semantic versioning.


The-Big-Username-Blocklist is released under the MIT License.

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