IconVault's Word Filter scans your text against a built-in sensitive word list plus any custom words you add, then either highlights every match in place or cleans them to ***. It is a quick way to check user comments, chat messages, form submissions or any copy before it goes live, and to produce a sanitized version you can copy out.

Scanning runs fully in your browser, so your text is never uploaded and nothing is stored. It is free with no signup. Honest note: the built-in list is a moderate starter set in English, not a comprehensive moderation dictionary, so add your own words for real moderation use, and remember that simple word matching cannot catch creative misspellings or context.