Data Viewer

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How it works

  1. 01

    Open a file

    Drop a file or choose one. DuckDB WASM, the DuckDB database compiled to WebAssembly, reads it inside this page: nothing is uploaded, it works offline, and files of hundreds of MB work.

  2. 02

    See the data

    The rows show as a table. The Columns tab lists them with their types, distinct values, ranges and nulls.

  3. 03

    Query it

    Edit the SQL to filter, group and sort, or switch the view to a chart.

Questions

Is my file uploaded?
No. DuckDB WASM reads the file in this page, and the file is kept in this browser's storage until you delete it.
How large can the file be?
As large as your browser's memory and storage allow. Parquet files of several GB work, since only the rows shown are read.
Which formats can I open?
Parquet and CSV, including .tsv. DuckDB detects the delimiter and the column types.
Is it free?
Yes. Dash is open source under the AGPL-3.0 license.
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