Removing special characters from strings is crucial for data sanitization, URL slug generation, filename cleaning, and implementing features like username validation or search query normalization in JavaScript applications. With over 25 years of experience in software development and as the creator of CoreUI, I’ve implemented special character removal extensively in components like form validation, file upload systems, and search functionality where clean, standardized text improves data quality and user experience. From my extensive expertise, the most powerful and flexible solution is using the replace() method with regular expressions to target specific character patterns. This approach provides precise control over which characters to remove and handles complex filtering scenarios efficiently.