Free Excel Merger Online

Merge multiple Excel files into one. Reads the first sheet from each file. Drag to set merge order, validate column alignment, and download a single merged .xlsx file. No uploads required.

.xlsx .xls .xlsm .ods

First sheet from each file. Drag-to-reorder. Column mapping.

Upload any number of Excel files, validate column alignment, and download a clean merged .xlsx.

100% Private. No Uploads.

Your Excel files are processed entirely in your browser using SheetJS. We never see your data.

Client-side only Zero server storage GDPR & HIPAA friendly .xlsx output

Upload Excel Files to Merge

Click to browse or drag and drop multiple files

Supports .xlsx, .xls, .xlsm, .ods

Merging files...

Merge Complete

Also from Pirai AI

Convert this Excel file to a survey on 27+ platforms

Upload to Pirai AI and get a Qualtrics QSF, Google Forms, REDCap or SurveyMonkey file in minutes.

Try Pirai AI Free

How to Merge Excel Files Online

Upload your Excel files, set the merge order by dragging, validate column alignment, and download a single merged .xlsx file. Everything runs in your browser.

Upload Excel Files

Click the upload zone or drag and drop two or more .xlsx, .xls, .xlsm, or .ods files. Each file is parsed in your browser using SheetJS. Nothing sent to a server.

Set Merge Order

Drag the file cards to set the exact merge order. Each card shows the file name, first sheet name, row count, and column count. Rows appear in your specified order in the merged output.

Validate Columns

The tool checks column alignment across all files. If columns match, merge immediately. If not, choose Union mode or use Column Mapping to align mismatched column names.

Download .xlsx

Click Merge. Your files are combined and downloaded as a single .xlsx file with one sheet containing all merged rows and the aligned headers.

When Do You Need to Merge Excel Files?

Research, survey platforms, and CRM exports all produce data across multiple Excel files that needs to be consolidated.

Combine Survey Exports

Survey platforms often export data wave-by-wave or by date range as separate Excel files. Merge all waves into a single dataset for unified analysis.

Consolidate Agent Files

Field researchers or call centre agents each maintain their own Excel file. Merge all agent files into a master dataset after collection is complete.

Reunite Split Workbooks

Large datasets are sometimes split by region, time period, or team. Merge them back into one file before analysis or re-import into a platform.

Combine CRM Exports

CRM exports often come as multiple Excel files segmented by account type, region, or date. Merge all segments before cleaning and re-importing.

Prepare for Platform Import

Survey platforms like Qualtrics require a single contact or SDS file. Merge multiple lists into one, then use Pirai AI to convert to the platform format.

Consolidate Database Extracts

Multiple database queries or ETL outputs in Excel format can be merged into one file before loading into BI tools or data warehouses.

Frequently Asked Questions

Common questions about merging Excel files online.

Upload two or more Excel files, drag the cards to set the merge order, review column alignment, and click Merge. The tool reads the first sheet of each file and produces a single .xlsx with all rows combined.
The tool reads the first sheet from each uploaded file, regardless of its name. The sheet name is displayed on the file card after upload so you can confirm it is reading the correct tab.
The tool supports .xlsx (Excel 2007 and later), .xls (Excel 97-2003), .xlsm (macro-enabled workbooks, macros are not preserved), and .ods (OpenDocument Spreadsheet). All formats are read client-side using SheetJS.
The tool detects column mismatches automatically. Choose Union mode to include all unique columns from all files (with blanks for missing values), or use Column Mapping to manually align columns from each file to the base schema from File 1.
Yes. All processing happens entirely in your browser using SheetJS. Your Excel files are never uploaded to any server, stored, or retained by Pirai AI. GDPR and HIPAA friendly.
A single .xlsx file named merged_output.xlsx, containing one sheet with all merged rows. All values are written as text strings to preserve formatting and avoid Excel type inference issues.

From the makers of this free tool

Convert any survey document to Google Forms, Qualtrics, or 25+ platforms

Upload a Word, PDF, or Excel questionnaire. Pirai AI structures it with AI and exports a platform-ready import file in minutes.

Free daily credits • No credit card required • 400+ universities