OneTable (pronounced /wʌnˈteɪbl/) is a multi-platform (Win/Mac) software for combining tabular tables (Excel, CSV, etc.). Unlike other software like Excel Power Query, or Altryx, OneTable is designed from the ground up to be able to deal with inconsistent table header structure and supports multi-level header table structure out of the box. It also supports multiple tables in one sheet. The core feature is Header Mapping, which can help you unify all your datasets like a breeze.