To use the converter, paste your Bootstrap 3 HTML code in the top text area and press the Convert Code button. Once ready, the converted code will appear in the bottom text area - there you can Preview it and/or copy and paste it to your page.

NOTE: This utility provides basic conversion capabilities between Bootstrap 3 and 4 versions. It is based on the unreleased Bootstrap 4 Alpha 5 version, mentioned in this document. If some of your templates do not render properly after the conversion, refer to that document and manually update the markup of these elements.