SheetTidy

100% OFFLINE · NOTHING UPLOADS

Drop in a messy CSV. Remove duplicate rows, trim stray spaces, drop empty rows and columns, and split a file that's too big into numbered pieces. Your data never leaves this computer — which matters, because CSVs are usually customer lists.

Drop a CSV here or click to choose

Clean

Trim spacesLeading and trailing whitespace in every cell Remove duplicate rowsIdentical rows, keeping the first Drop empty rowsRows where every cell is blank Drop empty columnsColumns with no data at all First row is headersKeeps it on every split file

Split

Split into pieces of rows

Drop a CSV to see what's wrong with it.

SheetTidy — one file, no install, no account, no upload. Parses quoted fields, embedded commas, and both Windows and Unix line endings correctly. Keep it on a USB stick; it will still work in ten years because there is no server behind it.