Compare files
See added, removed, and changed rows across CSV and XLSX files.
Open Compare →Built for everyday data work
One calm workspace for messy files.
Focused tools for the moments when a spreadsheet needs an answer.
Clean data
Find empty cells, duplicates, whitespace, and mixed column types.
Open Cleaner →Convert formats
Move between CSV and XLSX with a local browser workflow.
View converters →About DataFileLab
Useful tools without the busywork.
DataFileLab is a focused toolkit for people who work with spreadsheets every day. Files stay in your browser by default, making cleanup and comparison easier to understand.