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AllgoTool directory
Calculate, convert and clean up your work.
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35 tools · No account required · Most work in your browser
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Choose a tool, enter your data, and get your result.
Spreadsheet and image tools process files in your browser.
From profit margins to clean spreadsheets, without an account.
Spreadsheets
Merge CSV and Excel Files
Combine files and match columns by heading.
How to use the merge csv and excel files
- Choose a supported file or enter the data requested by the tool.
- Choose the available options and run the tool.
- Review the result and download the output in a supported format.
Worked example
A Product/Price file and a Price/Product/Stock file merge by heading, with a new Stock column and blanks where values are missing.
Understanding the result
Select two to ten files. Matching uses trimmed, case-sensitive column headings; each file must have unique headings. The result can contain up to 1,000 data rows.
Frequently asked questions
Do columns need to be in the same order?
No. Columns are aligned by heading. Matching names must use the same letter case.
Is this merge CSV files free to use?
Yes. This version of AllgoTool is free to use and does not require an account. The tool’s limits are explained above.
Supported inputs and limitations
CSV and .xlsx supported. First worksheet only; up to 1,000 data rows and 50 columns. Files stay in your browser. Exports contain text values; styling and formulas are not preserved.
Need another utility? Browse spreadsheets tools or see all free tools.