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Transpose CSV Tool

Swap rows and columns of a CSV to transpose your data instantly.

100% Secure - your files are processed in your browser and never sent to a server.
Drop your file hereor click to browseSupports CSV, TSV, or TXT files (.csv, .tsv, .txt) (Max 100MB)

Transposing CSV data swaps rows and columns, turning column headers into row values and vice versa. This is useful when your data is oriented incorrectly for analysis, when you need to pivot a matrix, or when preparing data for tools that expect a specific orientation. This tool reads CSV data and produces the transposed matrix, with the first column becoming the new header row. You can configure the input delimiter, toggle whether the first row is a header, and choose the output delimiter. The transpose operation is performed in memory using a simple row-column swap algorithm. All processing happens in your browser, making it safe for transposing sensitive data like financial matrices, survey results, or comparison tables. The output is a properly formatted CSV that maintains data integrity during the orientation change.

How to use the Transpose CSV tool

  1. Load your CSV data: Drag and drop your CSV file, choose a file from your file explorer, or paste CSV data directly into the paste area.
  2. Configure settings: Select the CSV delimiter and toggle whether the first row is a header to include in the transposition.
  3. Transpose data: Click the "Transpose Data" button to swap rows and columns of your CSV.
  4. Export results: Copy the transposed data to your clipboard or download it as a file.

Frequently asked questions

What happens to the header row during transposition?
When the header option is enabled, the first row becomes the first column in the transposed output. The original column headers become row labels.
Can I transpose a matrix of numbers?
Yes. The tool transposes any tabular data, including numeric matrices. Each cell value is preserved in its new position.
Does the tool handle asymmetric matrices?
Yes. If the original CSV has more rows than columns (or vice versa), the transposed output will have more columns than rows. Empty cells are filled with blank values.
Can I transpose back to the original orientation?
Yes. Apply the transpose operation twice to return to the original orientation (transposing a matrix twice returns it to its original form).
Is the transposed output properly formatted CSV?
Yes. The output follows RFC 4180 format with proper quoting, delimiters, and encoding. It is compatible with all standard CSV readers.

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