TSV to Parquet converter

Convert TSV files to Apache Parquet in your browser. Choose a compression codec and download the result locally — files never leave the page.

How the TSV to Parquet conversion works

Drop a .tsv file — tab-separated values, the shape database dumps and clipboard-pasted tables arrive in. The header row becomes column names, values are type-detected, and after a preview you download a typed .parquet with your chosen codec. Everything runs in your browser; nothing uploads.

How column types are inferred

• true/false only → BOOLEAN
• integers within ±2,147,483,647 → INT32
• larger integers → INT64
• decimals → DOUBLE
• ISO 8601 dates → TIMESTAMP
• mixed/other → STRING (UTF-8)
• Inference samples the first 200 values per column; empty fields become nulls.

Large files

For very large TSVs: pandas read_csv(sep='\t').to_parquet() or DuckDB read_csv with delim='\t' and COPY … TO FORMAT PARQUET.