Lemur Column Editor

Edit columns in any CSV or Excel file online — no signup, no upload, no limits. Drop your file, and every column is listed with a checkbox and editable name. Uncheck columns to remove them, use arrows to reorder, click to rename. Preview the result and download as CSV or Excel. Everything runs locally in your browser. Your data never leaves your device.

How do I delete columns from a CSV?

Drop your CSV or Excel file into the tool. Each column is listed with a checkbox. Uncheck the columns you want to remove, then download the result. Only checked columns are included in the output.

Can I rename columns?

Yes. Each column header is an editable text field. Click on it, type the new name, and the output will use the updated header names.

Can I reorder columns?

Yes. Use the up/down arrows next to each column to move it. The output follows the order shown in the column list.

Does it work with Excel files?

Yes. Drop any .xlsx, .xls, or .csv file. For multi-sheet Excel files, pick the sheet you want to edit.