Clean Studio: clean data & remove duplicates

Tidy up with a safety net

Badges show how many rows a step affects before you apply it. With preview, undo and reset you can experiment safely until the table is right.

• Remove duplicate rows, empty rows and empty columns.
• Trim whitespace and convert German number formats (1.234,56) into real numbers.
• Find and replace, rename or delete columns.
• Export as Excel, CSV or JSON.

Entirely in your browser

Cleaning runs locally too. Your table never leaves your computer – fully privacy-friendly.

Clean data as a foundation

Messy tables are the most common cause of wrong analyses: duplicate records distort totals, empty rows break filters, and numbers stored as text cannot be summed. Clean Studio fixes exactly these problems before you load the data into the data dashboard or pass it on with the converter. That way the result is right on the first try.

All SmashDash tools at a glance

SmashDash brings five free spreadsheet tools together in one place – each runs entirely in the browser, with no upload and no account:

• Turn Excel and CSV into interactive, filterable charts. – Turn Excel and CSV into interactive, filterable charts.
• Design charts with your own values and export them as SVG or HTML. – Design charts with your own values and export them as SVG or HTML.
• Convert Excel, CSV and JSON into XLSX, CSV, JSON, Markdown or HTML. – Convert Excel, CSV and JSON into XLSX, CSV, JSON, Markdown or HTML.
• Remove duplicates and empty rows, normalise number formats. – Remove duplicates and empty rows, normalise number formats.
• Merge, split and compress PDFs and extract tables. – Merge, split and compress PDFs and extract tables.

All processing happens locally in your browser – your files are never uploaded, fully privacy-friendly.