• Arts & Entertainment, Music
• XLTHTML file extension reader
• April 21, 2026

An XLTHTML file is an older Microsoft Excel-related file format that can be understood as an Excel template saved in HTML form. Instead of existing purely as a standard spreadsheet template, it uses HTML so the spreadsheet content and layout can also be displayed like a web page. In simple terms, it combines the idea of a reusable Excel template …