Compare software

Tabiew vs TOPCAT: catalog facts
Tabiew	TOPCAT
Free Free to use; the source is published on GitHub.	Free Free to download.
Command line	Windows, macOS, Linux
Opens CSV, TSV, Parquet and Arrow files SQL queries on the loaded data	Handles FITS, VOTable, CDF, CSV and Parquet Interactive exploration of large tables
Viewer and query tool rather than a full data editor Terminal interface takes some learning	Interface and features are oriented toward astronomy Requires Java
Downloadable app	Downloadable app
Open source	Closed source
License not stated	License not stated
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 1, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.