All tools/Spreadsheet / Data

10 free tools

Spreadsheet / Data

Repair, reshape, compare, and convert everyday data files.

What this category is for

Repair, reshape, compare, and convert everyday data files. These tools are meant for local, browser-first work: cleaning, comparing, estimating, and generating something you can use right away.

Common starting points

Merge CSV Files Combine multiple CSV files that share the same columns.
Split CSV Files Break a large CSV into smaller files by row count.
Remove Duplicate Rows Remove repeated rows using all columns or selected columns.

Merge CSV Files

Combine multiple CSV files that share the same columns.

Split CSV Files

Break a large CSV into smaller files by row count.

Remove Duplicate Rows

Remove repeated rows using all columns or selected columns.

Compare Two CSVs

Find rows that were added, removed, or kept between two files.

Excel to CSV Cleaner

Convert an Excel sheet to clean CSV in your browser.

Column Mapper

Rename and reorder columns into a target schema.

CSV Formula Generator

Build spreadsheet formulas from a plain-English recipe.

Spreadsheet Error Finder

Scan CSV data for blanks, inconsistent widths, and suspicious values.

Delimiter Converter

Convert comma, tab, semicolon, or pipe-delimited data.

JSON ↔ CSV Converter

Convert arrays of JSON objects to CSV and CSV back to JSON.