Free · no signup · browser-local
CSV & Excel Cleaner
Preview table data, trim whitespace, remove duplicate rows and export.
Private by design: files and input stay in this browser. No account or upload.
5 MB/file; 1M text characters; 10,000 rows, 100 columns, 100,000 cells. XLSX: first sheet only, text/cached values, no formula evaluation. CSV exports prefix risky formula-like cells with an apostrophe.
Getting started
Load a table, choose cleaning options and download CSV or Excel.
Before you use the result
Review data types and formulas before using an exported workbook.
Frequently asked questions
Preview table data, trim whitespace, remove duplicate rows and export.
How do I use CSV & Excel Cleaner?
Load a table, choose cleaning options and download CSV or Excel.
Does this tool upload my data?
Inputs and files are processed in your browser. Page-view analytics do not contain your tool input.
What should I check before using the result?
Review data types and formulas before using an exported workbook.