I think there’s quite a demand for displaying Excel files on web pages while preserving their formatting.

In such cases, I recommend using “Excel Sheet to HTML Table Converter” (エクセルシートをHTMLテーブルに変換しちゃう君) as it can convert quite easily.

・エクセルシートをHTMLテーブルに変換しちゃう君 (ββ)

・「エクセルシートをHTMLテーブルに変換しちゃう君 」がすごく便利 - WEBマーケティング ブログ

You need to apply CSS yourself to make it look good, but this tool made things much easier for me.

That’s all from the Gemba.