Excel 파일 병합

월별 집계 — 12개의 월별 보고서를 하나의 연간 통합 문서로 결합하고, 원본 파일당 하나의 시트로 유지합니다.

지점 데이터 수집 — 각 지역 사무소가 동일한 템플릿을 보내면 병합하여 결과를 나란히 비교할 수 있습니다.

보관 — 수십 개의 작은 첨부 파일을 보관하는 대신 관련 통합 문서를 하나의 파일로 묶습니다.

Merging is easy to confuse with a few related jobs, so pick the right tool before you upload:

• Merge Excel files (this page) — combines several workbooks into one workbook where every original sheet stays its own tab. Nothing is stacked or joined: a sheet named January in file A remains a separate sheet next to a sheet named January in file B, renamed automatically if the names collide.
• Merge sheets into one — the opposite direction: it takes the many sheets inside a single workbook and stacks them vertically into one flat table, aligning headers and optionally adding a source-sheet column.
• Join Excel tables — a database-style left join that enriches one table with columns looked up from another table by a shared key column, instead of collecting whole sheets.
• Compare Excel files — highlights the cells that differ between two versions of a workbook rather than combining them.
• Remove duplicates from Excel — merged archives often contain repeated rows; this tool deduplicates a sheet by the columns you choose.

Everything runs locally in your browser. The files are parsed in memory, combined into a new workbook structure, and written back as a single .xlsx download — nothing is uploaded to a server. That makes the tool suitable for payroll exports, financial statements, or client data that should never leave your machine.

Sheets keep their original names whenever possible. When two incoming files contain a sheet with the same name, the later one is prefixed with its file name so you can still tell them apart. Internal metadata sheets created by the editor are skipped automatically. Cell values, dates, and number formats survive the merge; highly specific styling such as conditional formatting rules may be simplified in the output.