BYTETOOLS

CSV Transpose

Transpose a CSV online — rows become columns and columns become rows. Quote-aware parsing, ragged rows padded automatically, all processed in your browser.

Drop a .csv file here or click to browse

What is the CSV Transpose?

The ByteTools CSV Transpose tool flips a table on its diagonal: every row becomes a column and every column becomes a row.

  • Full matrix transpose — rows to columns and back
  • Short rows padded automatically before the flip
  • Quote-aware parsing and correct re-quoting
  • Input and output dimensions shown
  • Comma, semicolon, tab and pipe delimiters
  • 100% in-browser — no upload

How to use the CSV Transpose

  1. 1

    Paste your CSV or drop a .csv file.

  2. 2

    Pick the delimiter if it is not a comma.

  3. 3

    Click Transpose rows and columns.

  4. 4

    Check the before/after dimensions shown above the result.

  5. 5

    Copy the transposed CSV or download it.

About the CSV Transpose

The ByteTools CSV Transpose tool flips a table on its diagonal: every row becomes a column and every column becomes a row. It is the same operation as Excel's Paste Special → Transpose, but it works on raw CSV of any size without opening a spreadsheet.

The parser is quote-aware, so fields containing commas or line breaks survive the flip intact, and ragged data is handled gracefully — shorter rows are padded with empty cells to the width of the longest row before transposing, so nothing shifts out of alignment.

It is handy when a dataset arrived rotated: metrics listed across the top that you need down the side, one-record-per-column exports, or wide summary tables that need to be tall for a database import. Processing is 100% local in your browser and nothing is uploaded.

Frequently asked questions

What does transposing a CSV do?

It swaps the axes of the table: the cell at row 3, column 2 moves to row 2, column 3. Headers running across the top end up running down the first column, which is exactly what you need when data arrives rotated 90 degrees from how you want it.

What happens if my rows have different lengths?

Shorter rows are padded with empty cells up to the length of the longest row before the flip. That keeps every value in the correct position — you may simply see some empty cells in the output where data was missing.

Can I undo a transpose?

Yes — transposing is its own inverse. Paste the output back into the input and transpose again and you get your original table back, apart from any padding cells added to even out ragged rows.

Does it work with semicolon or tab separated files?

Yes. Choose semicolon, tab or pipe as the delimiter and the tool both parses the input and writes the output with that separator.

Is there a size limit and is my data private?

The tool comfortably handles files with thousands of rows and everything runs locally in your browser — the file is never uploaded, so private data stays on your machine.

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