Free online CSV & spreadsheet tools
Clean, convert, and chart your data — each tool does one job well, with no spreadsheet formulas, no install, and no upload. Your file is processed entirely in your browser, so it never reaches our servers.
Remove duplicates from CSV
Delete duplicate rows by any column, keep the first or last match, and download a clean file.
Open tool →Clean phone numbers
Format a messy column of phone numbers to the E.164 standard, with no upload.
Open tool →Clean email column
Lowercase, trim, validate, and dedupe an email column in a CSV — entirely in your browser.
Open tool →Split full names
Break a full-name column into separate first and last name fields, with optional middle name.
Open tool →Combine columns
Merge two or more CSV columns into one — pick a separator and name the new field.
Open tool →Find and replace in a CSV
Swap text in a column like Excel's Find & Replace — match case or whole cell, with no upload.
Open tool →Convert CSV to Excel
Turn a CSV into a formatted .xlsx workbook in your browser — no upload, no install.
Open tool →Convert Excel to CSV
Export the first sheet of an .xlsx or .xls file to a clean CSV — entirely in your browser.
Open tool →Visualize a CSV as a chart
Summarize a spreadsheet into a bar, line, area or pie chart and export the image — nothing uploaded.
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