This tool reads your selected .txt and .csv files directly in the browser and joins them into one clean file. Because all processing happens client-side, confidential logs, exports, and lists never leave your computer.
You can drag and drop multiple files at once, reorder them using the up and down controls in the table, pick a separator between file contents, and download the result as either .txt or .csv.
Automatic encoding detection ensures that even mixed batches of UTF-8 and legacy Windows-1251 files are combined into a single valid UTF-8 document without garbled symbols.
How do I merge several CSV files into one without opening Excel?
Drag all CSV files into the upload area, select the "New line" separator and ".csv" output format, then click "Merge & Download" to get a single combined CSV file in seconds.
Can I change the file order before merging?
Yes — click the up or down arrow next to any file in the table to adjust the exact order in which the files will be joined.
What if my files use different character encodings?
The reader validates UTF-8 for each file individually and automatically falls back to Windows-1251 when needed, outputting a unified UTF-8 file.
Ways to combine multiple text files into one
| Method | Software setup | Best for |
|---|---|---|
| Browser TXT and CSV merger | None required | Fast client-side merging with visual reordering and encoding detection |
| Terminal copy or cat command | None, requires command-line syntax | Developers merging files alphabetically in a folder |
| Spreadsheet editors | Desktop app or cloud account | Joining tables that need formula calculations afterward |
| Manual copy and paste | None required | Joining two small snippets by hand |