How it works
Simple steps, local processing.
This public site explains the tools. The separate workspace reads your files and makes the copies in your browser.
Open the workspaceFrom a file to a clean copy
- 01
Open files
Choose or drop CSV, TSV, JSON or Excel (.xlsx) files. Each file, or each sheet of a workbook, becomes a sheet. Files shows its encoding, separator and first lines, and lists anything that could not be opened with the reason. Nothing is uploaded.
- 02
Check and clean
The grid shows the copy as it will be saved, with each column's type. Trim spaces, drop empty rows, remove duplicates, rename, move or remove columns and write dates as YYYY-MM-DD. Every step is named and can be undone.
- 03
Save and download
Choose CSV, TSV, JSON or Excel and their settings. The copy is read back and checked before it is offered; several sheets become one workbook or a ZIP of files.
Files stay unchanged
The workspace makes new files to download; the ones you open are never written to.
Values as read
Codes, ids and dates are kept as text unless you choose a step that changes them.
Device protection
Limits keep very large files from overwhelming the browser: up to 1,000,000 rows.
Pick a task to begin.
Clean a CSV · Fix separators · Remove duplicates · CSV to Excel · CSV to JSON
Open the workspace