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VisiDataTOPCAT
Free

Free and open source under GPL-3.0, supported by donations.

 Free

Free to download.

macOS, Linux, Command line Windows, macOS, Linux
  • Opens dozens of data formats, including Excel and SQLite
  • Handles millions of rows quickly
  • Handles FITS, VOTable, CDF, CSV and Parquet
  • Interactive exploration of large tables
  • Keyboard-driven interface with many commands to learn
  • Some formats need extra Python packages
  • Interface and features are oriented toward astronomy
  • Requires Java
Downloadable app Downloadable app
Open source Closed source
License: GPL-3.0 License not stated
No account needed No account needed
Works offline Works offline

Checked September 23, 2026

Checked October 1, 2026

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