CSV, JSON & Parquet SQL Data Lab

Load a file as the table named data, then run a SELECT or WITH query. The displayed and exported preview is limited to 200 rows.

LOCAL ENGINEDuckDB-Wasm 1.32.0CSV · TSV · JSON · NDJSON · ParquetSELECT / WITH queries

Selected files are read by the SQL engine inside this browser. KivTools does not upload the file, query, or query result.

Local SQL query

SELECT * FROM data LIMIT 100

The loaded file is exposed as data. To keep the workspace non-destructive, this tool accepts SELECT and WITH queries only and displays at most 200 rows.

Query result

Load a local file, then run a SELECT query.

Analyze data without a data upload

Data Lab is useful for a quick schema check, a targeted SQL slice, or a local Parquet preview. It is not a replacement for access-controlled production analytics, and it never opens a URL or sends the selected file to KivTools.