KivTools

CSV, JSON & Parquet Data Lab LOCAL ONLY

Open structured data in a browser SQL workspace, inspect it with DuckDB-Wasm, and export visible results without uploading a file.

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

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.

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