HTML + JavaScript + CSS
- developed by Tawhidur Rahman Dear, https://www.tawhidurrahmandear.com
- Live Preview available at https://www.devilhunter.net/p/symbol-alt-code-unicode-html-entity.html
- Released under GPL-3.0 license on Github at https://github.com/tawhidurrahmandear/symbol-alt-code-unicode-html-entity