Can I convert a CSV with missing cells or uneven column counts?

Yes, the tool options include a method for filling incomplete values, which helps handle rows with different numbers of columns after transposition.

How do I exclude comment lines from my CSV conversion?

In the tool options, you can specify the character that starts comment lines, and the tool will skip those lines during the columns-to-rows conversion.

What happens if my CSV file has a header row?

The tool treats the first row as data columns and transposes all rows including the header into the new row-based output format.

Is there a file size limit for the CSV Columns to Rows converter?

The material does not specify a file size limit; very large files may perform slowly or trigger errors depending on browser capacity.

Developer ToolsFree Tool

CSV Columns to Rows

Provided byOnline CSV Toolsonlinetools.com/csv

Transposes CSV columns into rows.

Use This Tool

developer data csv

Screenshot of CSV Columns to Rows on Online CSV Tools — onlinetools.com/csvOpen the live tool →

About this tool

What CSV Columns to Rows does

CSV Columns to Rows is a free online converter that transposes horizontal CSV data into vertical records. Users upload a CSV file, and the tool restructures the data so each original column becomes a distinct row entry, making it easier to analyze or import into systems expecting vertical formats. The tool handles the core transposition automatically, with optional settings for filling incomplete values and excluding comment lines based on a specified character. It is designed for developers, data analysts, and researchers who need to reorganize spreadsheet structures without installing software or writing scripts.

Step by step

How to use the Online CSV Tools CSV Columns to Rows

1
Upload a CSV file using the file import function
2
The tool automatically transposes all columns into rows
3
Choose a method for filling incomplete values in the tool options
4
Specify a comment character to exclude comment lines if present
5
Copy the output CSV to clipboard, download the file, or export to Pastebin

Is it right for you

Best for

Developers, data analysts, and researchers who need to quickly transpose CSV data into a row-based format for analysis or system import without writing code or using spreadsheet software.

Limitations

Ads appear on the Online CSV Tools page
Results depend on correct CSV formatting; malformed files may error
No unit switching or data type conversion beyond transposition

Questions

CSV Columns to Rows FAQ

Can I convert a CSV with missing cells or uneven column counts?: Yes, the tool options include a method for filling incomplete values, which helps handle rows with different numbers of columns after transposition.
How do I exclude comment lines from my CSV conversion?: In the tool options, you can specify the character that starts comment lines, and the tool will skip those lines during the columns-to-rows conversion.
What happens if my CSV file has a header row?: The tool treats the first row as data columns and transposes all rows including the header into the new row-based output format.
Is there a file size limit for the CSV Columns to Rows converter?: The material does not specify a file size limit; very large files may perform slowly or trigger errors depending on browser capacity.

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