FuseSheet: Merge Excel Files Online

Combine multiple Excel workbooks or sheets into one master file. Supports XLSX, CSV, and more.

Start Merging Files

Multi-Mode Merging

Choose your strategy: Combine sheets into one, keep workbooks as separate sheets, or merge overlapping data sets.

Header Alignment

Smart engine identifies and aligns column headers across multiple sheets consistently, even if they're in different orders.

XLSX & CSV Engine

Seamlessly handle modern XLSX, legacy XLS, and raw CSV files in a single merge operation without format conflicts.

Privacy Consolidation

Process sensitive financial workbooks entirely in your browser. No data upload means no security risks for your business.

Google Cloud Sync

Optional sign-on to track your merge history and unlock advanced limits for high-volume data processing tasks.