CSV file merger
Append CSV files with explicit header alignment.
Як карыстацца CSV file merger
The CSV file merger appends rows from several CSV or XLSX files into one table, aligning columns by header name. The output uses the union of all headers in the order they first appear, and cells for columns missing from a file are left blank. The merged table downloads as result.csv and is capped at 200 columns and 20,000 rows.
- Choose a source file. If the tool accepts multiple files, arrange them in the order you want.
- Check the source format before running the operation.
- Run csv file merger, review the output, then use the available copy or download controls.
Што падтрымлівае гэты інструмент
Append CSV files with explicit header alignment.
Абмежаванні і апрацоўка
CSV/XLSX inputs are capped at 10 MB each, 200 columns and 20,000 rows; joined output is capped at 20,000 rows. JSONPath script/filter evaluation is disabled. Other operations apply their visible controls and text limits.
Частыя пытанні
Can I merge CSV files with different columns?
Yes. Columns are matched by exact header name, and any header found in any file is included. When a file lacks a column, its rows get blank cells there instead of shifting data into the wrong column.
What order are merged CSV columns in?
Headers appear in first-seen order: all columns of the first file, then any new columns from the second file, and so on. Rows follow the order of the files.
Can I merge Excel files and CSV files together?
Yes. Each input can be CSV or XLSX; for XLSX the first sheet is read. Every file needs unique, nonempty headers and rows matching the header length, or the merge stops with an error.
Where is my input processed?
This operation processes its source in your browser. Copy and download are explicit actions; source input is not saved in an account or history.
What are the input limits?
CSV/XLSX inputs are capped at 10 MB each, 200 columns and 20,000 rows; joined output is capped at 20,000 rows. JSONPath script/filter evaluation is disabled. Other operations apply their visible controls and text limits.