CSV Cleanroom — Private Offline CSV Cleaner

Clean messy CSV files without uploading sensitive data. CSV Cleanroom is a self-contained offline tool that runs entirely in your browser — no installation, account, telemetry, subscription, or internet connection.

What it does: • Detects comma, semicolon, tab, and pipe delimiters • Normalizes headers to consistent snake_case • Trims hidden whitespace from cells • Removes blank rows and exact duplicates • Identifies likely dates, emails, numbers, integers, and booleans • Shows a 100-row preview and data completeness score • Exports a clean Excel-friendly UTF-8 CSV

Included: CSV Cleanroom 1.0, sample messy CSV, quick-start guide, and commercial internal-use license. Works in current Chrome, Edge, Firefox, and Safari on Windows, macOS, and Linux.