xlsx

.xlsx — Microsoft Excel Open XML Spreadsheet

Microsoft · 2007

開発者

Microsoft

カテゴリ

スプレッドシート

MIMEタイプ

application/vnd.openxmlformats-officedocument.spreadsheetml.sheet

初回リリース

2007

オープンフォーマット

いいえ

ファイルシグネチャ

50 4B 03 04 (PK ZIP)

.xlsxファイルとは？

XLSX is the default file format for Microsoft Excel spreadsheets since Office 2007. It stores data in cells organized into rows and columns, supporting formulas, charts, pivot tables, conditional formatting, and macros. The format is based on Open XML and uses ZIP compression, making files significantly smaller than the older .xls format. XLSX is the industry standard for business data analysis, financial modeling, and data management.

.xlsxファイルを開くプログラム

プラットフォーム	プログラム
Windows	Microsoft Excel	有料	公式
	LibreOffice Calc	無料
	Google Sheets	無料
macOS	Microsoft Excel	有料	公式
	Numbers	無料

.xlsxファイルのよくある問題

⚠️ Cannot open .xlsx file

Install one of the recommended programs listed above. For a free option, try the first free program in the list.

⚠️ .xlsx file is corrupted

Try re-downloading the file. If the file was transferred, ensure the transfer completed without errors.

よくある質問

What program opens .xlsx files?▼

.xlsx files can be opened with several programs. Microsoft Excel is one of the most popular choices.

Is .xlsx a safe file format?▼

Generally yes, .xlsx files are safe to open with appropriate software.

Can I convert .xlsx to another format?▼

Yes, there are many online and offline tools available to convert .xlsx files. Check the conversion section above for specific methods.

技術詳細

Microsoft Excel Open XML Spreadsheet files use the application/vnd.openxmlformats-officedocument.spreadsheetml.sheet MIME type and were first introduced in 2007 by Microsoft. The file can be identified by its signature: 50 4B 03 04 (PK ZIP).

豆知識

Microsoft Excel Open XML Spreadsheet was first released in 2007 by Microsoft

セキュリティ情報

.xlsx files are generally safe to open. However, always ensure your software is up to date to protect against potential vulnerabilities.