ONLYOFFICE Document Server is an online office suite comprising viewers and editors for texts, spreadsheets and presentations, fully compatible with Office Open XML formats: .docx, .xlsx, .pptx and enabling collaborative editing in real time. HTTPS Support can be enable creating a "certs" folder in the data directory and placing onlyoffice.crt and onlyoffice.key in it. Add fonts by placing [fontname].ttf in the font folder and force updating the container.