This free online tool removes duplicate lines from any text and offers optional sorting (alphabetical, ASCII, or reverse). Perfect for cleaning logs, code, lists, or datasets, it processes everything in your browser. Fast, private, and easy to use for writers, developers, and data workers.
Easily encode and decode HTML entities with this online tool. Supports named entities from the W3C HTML5 spec plus 106 special characters, including arrows and currency symbols.
Online validation and testing tools for web developers. Learn which tools you need to validate HTML, CSS, JavaScript, security, and accessibility (a11y) in your web projects.
“Make errors impossible. Making it impossible for the user to make errors is the best way to eliminate error messages.”
