DuckLake Catalog Overview

Browse a DuckLake catalog's schemas, tables and columns, and query the data directly in your browser via DuckDB WASM — no server required. This is an unofficial stand-alone front end for a DuckLake catalog — see About to learn more. Point this page at any catalog with the ?catalog= URL parameter, e.g. overview.html?catalog=https://objectstore.surf.nl/…/catalog.ducklake.

⚙ Connection settings

For local testing: paste the dev objectstore URL above and click Connect.

DuckDB connection command:

Catalog

Select a card to drill down.

Connecting to DuckLake…

Schemas

Select a card to drill down.

Query Builder

Select a dataset first to build a query

Click column rows in the Columns section above to add them to your query — nested fields work too, and multiple selections are allowed. Selecting nothing means every column (SELECT *). Use the controls below to shape the result, then press "Apply this Query" to copy it into the Query Runner section below, where you can adjust and run it.

Maximum rows returned, and/or return only unique rows of the selected columns (the actual values, not a count).
Case-insensitive substring match against the last column you clicked — including values nested inside lists.
Generated Query

        

        

          
          
        

      

    


    
    
Query Runner

    

      Query the data right here