Free Data Cleaning Tools
Free, private, browser-based tools from the makers of Flookup. Every tool processes your data locally on your device. Nothing is uploaded, so your files stay yours.
New to these tools? Read the tutorial
CSV Editor
Inspect, clean, deduplicate, filter, sort and transform CSV files with a CSV health report. Handles huge files in streaming mode, all in your browser.
Open CSV WranglerFuzzy Matching Tool
Paste two lists of names, emails or text and get a similarity score for every match. Perfect for spotting near-duplicates.
Open Fuzzy Matching ToolCSV Diff
Compare two CSV files by a key column and see exactly what changed: added, removed and changed rows. Includes a match rate and a downloadable diff.
Open CSV DiffPlagiarism Checker
Compare two texts or up to twenty documents and highlight every matched passage: verbatim in red, reworded in amber. Runs entirely in your browser.
Open Plagiarism CheckerLast updated: August 2026