[1][2][3] They are compatible with Microsoft Office's Word, PowerPoint, and Excel.

Thinkfree Office supports ISO/IEC international standard ISO/IEC 26300 Open Document Format for Office Applications (odf, odt, odp, ods, odg).

[6] It also supports Microsoft's XML formats (docx, pptx, xlsx) and Microsoft's legacy binary formats (doc, ppt, xls).

The software was previously marketed under different names, such as Thinkfree Server, Thinkfree Online, Hancom Office Online, and Hancom Office Web.

[7] Eventually, the brand was consolidated under the name Thinkfree Office.