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Transpose CSV — Convert Rows to Columns

Swap rows and columns in CSV files

Transpose a CSV file online in one step: upload or paste your data and this free tool flips the table so every row becomes a column and every column becomes a row. It is the fastest way to convert CSV rows to columns (or columns to rows) without Excel formulas, Paste Special, or writing a script.

Rotating a table is a common fix when data arrives sideways — a sensor export with one column per reading, a report with metrics across the top instead of down the side, or a wide spreadsheet you need in tall format for a database import. Whether you call it transposing, flipping, rotating, or switching rows and columns, the result is the same reshaped file.

You can choose whether the first column of the original file becomes the new header row, preview the flipped grid before committing, and download the transposed CSV. Everything runs locally in your browser, so the file is never uploaded and your data stays private.

Files stay on this deviceRuns entirely in your browserFree — no signup

Drop your file here or browse from your device

Accepts CSV, TSV, TXT. Maximum input: 10 MiB. Files above this hard limit are rejected before local processing.

How to Use

  1. Upload your CSV file or paste CSV data into the tool
  2. Choose whether the first column should become the new header row
  3. Preview the transposed result — rows are now columns and columns are now rows
  4. Download the transposed CSV file

Features

  • Swap rows and columns in one click — no formulas required
  • Option to use the first column as the new header row
  • Live preview of the transposed grid before downloading
  • Handles ragged rows by padding missing cells safely
  • Preserves cell values, quoting, and special characters exactly
  • Works with comma, semicolon, and tab delimiters (auto-detected)
  • Private by design — transposing runs locally, no upload

Use Cases

  • Convert CSV rows to columns when an export arrives in the wrong orientation
  • Turn a wide, one-row-per-metric report into a tall, database-friendly layout
  • Flip survey or sensor data so each record becomes a row instead of a column
  • Rotate a table before importing into a tool that expects fields as columns
  • Reshape data for charting tools that read series from rows vs columns
  • Fix spreadsheets pasted sideways without redoing them by hand

Frequently Asked Questions

What does transposing a CSV do?

It rotates the table 90 degrees: each row becomes a column and each column becomes a row. A file with 3 columns and 1,000 rows becomes a file with 1,000 columns and 3 rows. Cell values are unchanged — only their positions move.

How do I convert CSV rows to columns without Excel?

Upload your CSV here (or paste the data), preview the flipped grid, and download the result. There is no need for Excel’s Copy → Paste Special → Transpose workflow, and no size limit imposed by clipboard tricks.

What happens to my header row when I transpose?

The original header row becomes the first column of the output. Enable the "first column as headers" option if the first column of your original file (e.g., metric names) should become the new header row instead.

Can I transpose a CSV where rows have different lengths?

Yes. Ragged rows are padded with empty cells so the transposed output stays rectangular and valid — nothing is silently dropped.

Can I transpose a large CSV file?

The transpose runs locally, so the practical limit depends on browser memory and device performance. Also note that spreadsheet apps cap columns (Excel allows 16,384), so a very tall input may create an output that is too wide for a spreadsheet even though the CSV is valid.

Does transposing work for TSV or semicolon-delimited files?

Yes. The delimiter is auto-detected, so tab-separated and semicolon-separated files flip just like comma-separated ones.

Is my data private when transposing CSV files here?

Completely. The file is processed in your browser and never uploaded, stored, or logged.

Is CSV Transpose free to use?

Yes — free with no signup and no watermarks.

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