Data Lab
Clean, reshape, profile, visualize, and export CSV, TSV, and JSON data entirely in your browser. Build a repeatable sequence of changes without uploading sensitive records.
Local processingCSV · TSV · JSONUndo & redoCharts & profiling
0Rows
0Columns
0Missing cells
0Visible rows
Data previewNo data
Open or paste a dataset to begin.
Column profile
Choose a column after loading data.
Chart
Charts use up to the first 100 visible rows to remain responsive.
Private data cleaning without a server
Data Lab parses and transforms tabular data in this browser. It is suited to survey exports, research data, contact lists, program records, budgets, and other material that should not be sent to an unknown conversion service.
What it can do
Open CSV, TSV, and arrays of JSON objects; profile columns; find missing values; trim and normalize text; convert numbers and dates; rename or remove columns; filter, sort, and deduplicate rows; create basic charts; and export clean CSV or JSON.