You can find Converts.online Integromat modules here.
1) Click on Create a new scenario
2) Click on add module
3) Search Converts.online
4) Choose one of the Actions
5) Click on Add connection
6) Find your credentials here
7) Copy them to the Integromat, click on Continue
1) Add own HTML code, choose output format and add the Output file name
2) Run scenario
3) Response of the conversion
4) Use of the file from Converts.online