Merge pull request #646 from allenwest9/main

Added Rtcd.io under Online Tools

Author: markodenic

list/README.md

@@ -602,7 +602,7 @@ Initially created by [Marko](https://markodenic.com) at [Web Development Resourc
 | [JSONing](https://jsoning.com/)                                                  | A suite of JSON tools, including a formatter, validator, converter, generator, merger, and Mock API          |
 | [Markdown Tools](https://markdowntools.com)                                      | A suite of free tools for converting HTML, CSVs, PDFs, and Excel files to and from Markdown                  |
 | [OnlineInterview.io](https://onlineinterview.io/)                                | Free interviewing platform with shared code editor, drawing board and video chat.                            |
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+| [Rtcd.io](https://rtcd.io/)                                                      | A simple yet powerful online toolbox for encoding, encryption, data conversion, image processing and more.   |
 [⬆ back to top](#table-of-contents)
 
 ## UI Components: