macOS

For macOS ≥ 13.3 and Typora ≥ 1.9, you can debug Typora theme or CSS in following way:

1. Enable Develop menu item in Safari — you must also have enabled Web Inspector in the Settings app underSafari >Advanced >Web Inspector.Learn more about enabling Web Inspector…
2. SelectSafari menu →Develop → [your device name] →Typora to open the DevTools.

For older macOS, you can enable debug mode from Typora preferences panel → General, restart Typora and then right click on Typora writing area and selectInspect Element.

Windows / Linux

You could open DevTools fromView ->Toggle DevTools menu item.