Excel をシートごとに分割

データの配布 — 会社全体のブックではなく、各部門に自分のシートだけを送れます。

大きすぎるブック — 重くて遅いファイルを、すばやく開ける用途別のファイルに分割します。

システムへのインポート — 1 ファイル 1 テーブルしか受け付けないツールにも、分割すればそのまま対応できます。

Two very different jobs share the word split, so make sure you are on the right page:

• Split Excel (this page) — takes one workbook and writes every sheet out as its own .xlsx file, packed into a single zip. Use it when a workbook is really several reports stapled together under one file name.
• Split Excel by column — keeps one sheet intact but breaks it into multiple files based on the values in a column you choose, for example one file per region, department, or salesperson.
• Filter rows in Excel — when you only need one slice rather than many files, filter the rows by a condition and export just the matching records.
• Extract unique values — not sure which values a column contains before splitting on it? List the distinct values first, then decide how to partition the data.
• Merge Excel files — the reverse operation: combine many workbooks back into one file with each sheet preserved as its own tab.

The workbook is parsed once, as soon as you drop it in, and the sheet list appears immediately. Each sheet is exported as a complete, valid workbook that opens on its own in Excel, LibreOffice, or Google Sheets — no shared dependencies and no broken references back to the original file.

Output files follow a predictable naming pattern: the original file name, a dash, and the sheet name, so a file named report.xlsx with sheets North and South becomes report-North.xlsx and report-South.xlsx inside one zip archive. Hidden metadata sheets used internally by the editor are excluded, and everything runs locally in your browser — your data never leaves the device.