CSV Rows to Columns Converter
Transpose CSV rows into columns instantly. Free online tool with custom delimiters, fill values, and comment filtering. All processing in your browser.
What does CSV Rows to Columns do?
It transposes row-oriented CSV data into column-oriented format. Each original row becomes a column, making it easy to view data by field rather than by record.
What is CSV transposition?
CSV transposition is the process of swapping rows and columns in a CSV file. The first row of data becomes the first column, the second row becomes the second column, and so on. This is also known as pivoting or rotating data.
What delimiters are supported?
The tool supports comma (,), semicolon (;), tab, and pipe (|) as delimiters. You can select the appropriate delimiter for your CSV format from the dropdown menu.
What is "Filter comment lines"?
When enabled, lines starting with # or // are excluded from processing. This is useful for CSV files that contain inline comments or documentation within the data.
How are missing values handled?
If rows have different column counts, missing cells are filled with the "Empty cell value" you specify (empty by default) before conversion. This ensures the transposed output has consistent dimensions.
What does "Skip empty lines" do?
When enabled, blank lines in the input are ignored during processing. This prevents empty rows from creating unnecessary columns of empty values in the output.
Is my data safe?
Yes. All processing happens entirely in your browser using JavaScript. No data is ever sent to any server, making it safe for sensitive or confidential information.
Can this tool handle large CSV files?
The tool works well for moderate-sized CSV files. Since all processing happens in the browser, very large files may be limited by your device's memory. For typical use cases with hundreds or thousands of rows, it works smoothly.
Does the tool handle quoted fields?
Yes, the parser correctly handles CSV fields enclosed in double quotes, including fields that contain the delimiter character or escaped quotes (doubled double quotes).
What are common use cases for rows to columns conversion?
Common uses include: reformatting data for database imports, creating pivot-style views, preparing data for charting tools, converting between different CSV orientations required by various software, and reorganizing data for better readability.
Can I convert columns back to rows?
Yes! Simply paste the column-oriented data into the input area and run the conversion. The transposition operation is symmetric, so converting twice returns you to the original format.
Why use this tool instead of Excel or Google Sheets?
This tool is faster for quick conversions, requires no software installation, works offline once loaded, and most importantly, your data never leaves your browser. It's ideal for sensitive data that shouldn't be uploaded to cloud services.
How to Use CSV Rows to Columns Converter
Transpose CSV data so rows become columns and columns become rows. The conversion runs entirely in your browser — your data never leaves the page.
- Paste your CSV into the input area.
- Under 'Delimiter:', pick the character your file uses: comma, semicolon, 'Tab' or pipe '|'.
- Fill in 'Empty cell value:' if rows have different lengths and you want gaps shown as a placeholder such as '-'.
- Tick 'Skip empty lines' to ignore blank rows, or 'Filter comment lines' to drop lines starting with a comment marker.
- Copy the transposed result from the output area.
Rows of unequal length produce empty cells after transposing — set 'Empty cell value:' to '0' or '-' to make the gaps visible instead of blank.
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