Why doesn’t OnlyOffice Desktop support HTML file conversion? For example, I have an XLS file that contains a table in HTML format. How can I open or convert this file in OnlyOffice Desktop?
tasks_2025-05-22_10_59_38.xls (2.4 KB)
Hello @Yuri
Firstly, native file formats for Desktop Editor are OOXML formats, i.e. DOCX, XLSX and PPTX. This file, even though seem to be old XLS format, does not seem to be matching the extension. Going even further, it seems to be a plain HTML file.
There is no way to open such directly file in Desktop Editors, but there is a workaround: you can create a new empty spreadsheet, install HTML plugin from Plugin Manager or manually, then change extension of attached file to .html or attempt to open it with, for instance, NotePad+ or VS Code, to get the HTML content, and then paste it via plugin into new spreadsheet.
Considering all peculiarities of this file, I do not see this behavior as a bug.
Hi @Constantine
I’ve been searching for this topic, because I also stumbled across XLS files that are actually a HTML table and had to use an alternative office suite to open them.
While it’s not a bug that OnlyOffice can’t handle them, all other office suits do (Microsoft, LibreOffice, WPS) and unfortunately lazy programmers often implement excel exporting by creating a HTML file with XLS extension.
It would be great if OnlyOffice could handle these too.