A practical toolkit
A little less busywork.
Two focused tools, with transparent inputs and results. Your files stay in your browser.
CSV Duplicate Checker
Preview a CSV, choose the columns that define a match, and keep the first row. Review the rows to remove before downloading the cleaned file.
UTF-8 comma-separated files only. No XLSX upload or encoding detection claim.
Check your CSV ↗Formula Finder
Search eight everyday functions by purpose and spreadsheet app. See syntax, sample input, expected output, and the official source.
A curated reference library. It does not execute formulas.
Find a formula ↗