Free CSV combiner
Combine CSV files into one
Merge multiple CSV files into a single table. Matching headers line up automatically, every row keeps its source file, and you download one clean CSV — no Excel, no scripts, no uploads.
Files are processed in your browser. Nothing is uploaded.
How it works
- Step 1
Drop your CSV files
Add two or many — daily exports, monthly reports, splits from any tool.
- Step 2
Columns merge automatically
Headers are matched by name, so rows from every file stack into one table with a source column.
- Step 3
Download one CSV
Export the combined file, or ask questions across all of it with AI.
One header row, columns matched by name
Simple methods such as copy *.csv repeat every file's header inside the data and assume every file has the same column order. This combiner keeps a single header row, matches columns by their names, and adds a source column with each row's file name.
Step-by-step guides
Frequently asked questions
How do I combine multiple CSV files into one?
Drop your CSV files above. Analistable reads every file, matches the column headers and stacks all rows into a single table you can download as one CSV.
What if my CSV files have different columns?
That's fine. All columns from every file are included in the result, and rows keep an empty value where a column didn't exist — so nothing is lost when merging exports with slightly different structures.
How many CSV files can I combine at once?
As many as you need. Add daily, weekly or per-team exports in one go and they all merge into the same table, each tagged with its source file.
Can I combine CSV files with different encodings or delimiters?
Common cases are handled automatically. If a file uses an unusual encoding or a semicolon delimiter and won't read, open it in Excel and re-save it as a standard CSV first.
Is my data uploaded anywhere?
No. Combining runs entirely in your browser, so your files never leave your computer.
Go beyond combining
Connect Google Sheets and Excel, link related data and ask questions in plain language.
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