Best Free Data & Spreadsheet (No Cost, Tested by Us)

Looking for free data & spreadsheet tools that actually work? We tested every option below — these are the best free data & spreadsheet that don't cost a thing, with honest pros and cons.

1Our pick #1

JSON to CSV Converter

Convert JSON data to CSV and back — instant, in your browser.

✓ LocalNo sign-upFree

2Our pick #2

Google Sheets

Free online spreadsheet — collaborate, analyze, and automate with formulas.

FreeServer-side

3Our pick #3

CSV Lint

Validate and clean CSV files with detailed error reporting.

No sign-upFreeServer-side