Paste your CSV data — rows will become columns after transposing
Transposed output will appear here
Paste CSV on the left and click Transpose// swap rows ↔ columns of any csv table instantly
Swap rows and columns of any CSV table instantly in your browser. Transpose CSV data orientation without Excel or any software — free and private.
Transposed output will appear here
Paste CSV on the left and click TransposeCopy your CSV data and paste it into the input box. Select the correct delimiter if it's not comma-separated.
Hit the Transpose button or press Ctrl+Enter. Rows and columns will be instantly swapped.
Copy the transposed CSV to clipboard or download it as a .csv file ready to import.
The CSV Transposer swaps the rows and columns of any CSV table — turning row N into column N and vice versa. This is called a matrix transpose. It's useful when data was exported in the wrong orientation for your spreadsheet, database, or analytics tool.
Everything runs in your browser. Your data never leaves your machine.
Transposing a CSV table rotates it 90 degrees — every row becomes a column and every column becomes a row. If your original data has 3 rows and 5 columns, the transposed version will have 5 rows and 3 columns. It's the same operation as the TRANSPOSE function in Excel or Google Sheets.
Yes. The parser follows RFC 4180 CSV rules, so fields like "Smith, John" that contain commas inside double quotes are handled correctly. The quotes and their contents are treated as a single field and preserved in the output.
Absolutely. Use the Delimiter dropdown to select Semicolon ( ; ) before clicking Transpose. The tool also supports Tab-separated values (TSV) and pipe-delimited files. The same delimiter is used for both parsing and output.
The tool pads shorter rows with empty fields to match the widest row before transposing. This ensures the matrix is rectangular and the transposition is valid. You may see some empty cells in the output for those positions.
There's no hard-coded limit in the tool itself. Performance depends on your browser. Most CSVs up to a few thousand rows and columns will transpose instantly. Very large files (100k+ cells) may take a second or two.
No. The transposition runs entirely in your browser via JavaScript on the client side. Your CSV data is never transmitted, stored, or logged anywhere. It's completely private.
A CSV transposer is a tool that swaps the rows and columns of a comma-separated values (CSV) file. The operation is equivalent to the mathematical concept of matrix transposition: if your original table is an M×N grid (M rows, N columns), the transposed table is an N×M grid where every row from the original becomes a column, and every column becomes a row.
This is one of the most common data wrangling operations you'll encounter when working with spreadsheets, data exports, or analytics pipelines. It solves the fundamental mismatch between how data is collected (often row-by-row) and how it needs to be consumed (often column-by-column, or vice versa).
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There are several common scenarios where transposing is necessary:
The core algorithm is straightforward. Given a 2D array (the parsed CSV), the tool determines the maximum number of columns across all rows, then pads shorter rows with empty strings to create a rectangular matrix. It then constructs the transposed matrix by setting transposed[j][i] = original[i][j] for every valid index pair. The result is serialized back to CSV format using the same delimiter.
The implementation uses PHP's built-in fgetcsv() and fputcsv() functions, which handle RFC 4180 quoting rules correctly — including fields that contain commas, newlines, or double quotes inside quoted strings.
CSV is a loose standard and different tools use different field separators. This transposer supports four common delimiters:
Excel and Google Sheets both have a TRANSPOSE() function that does the same thing — but it requires you to select the right target range, enter it as an array formula, and work within the spreadsheet environment. Our online tool is faster for a quick one-off operation: paste, click, copy. No formula knowledge required, no file to open.
Google Sheets also supports Paste Special → Transpose for a point-and-click approach, but again — that requires opening the file in a browser app, signing in, and navigating menus. For developers and data engineers who are already in a terminal or code editor, a dedicated web tool is often the fastest path.
Real-world CSV files are messy. Here's how this tool handles common edge cases:
"New York, NY" is treated as a single field.TRUE, 1.5, and 2024-01-01 are preserved exactly as typed.This tool processes your data entirely in the browser using JavaScript on the client side. No data is transmitted to any server. No logs are kept. Your CSV content is never stored, shared, or analyzed by anyone other than you. This makes it safe to use with sensitive or proprietary data.
If you work frequently with CSV data, you may also find these tools useful: the CSV to JSON converter turns tabular data into structured JSON objects, the CSV Column Extractor lets you pull specific columns without a spreadsheet, and the CSV Delimiter Detector automatically identifies what separator your file uses. All tools are free, browser-based, and require no sign-up.