A better way to view & analyze data


Tad is a free (MIT Licensed) desktop application for viewing and analyzing tabular data.

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A fast CSV file viewer that works on large files. CSV data is imported into SQLite for fast, accurate processing.


It's a Pivot Table for analyzing and exploring data in SQL data sources.


Designed to fit in to the workflow of data engineers and data scientists.


Tad 0.8.3 - April 17, 2017

An initial release of Tad for macOS is now available for download and installation.

This release supports basic viewing and analysis of CSV files but there are some important limitations and caveats:

  • This initial release is for macOS only (no Windows or Linux builds yet, sorry).
  • This release only supports CSV files imported into an internal SQLite instance; there is no connectivity to other SQL databases.
  • There is no cell selection or Cut / Copy / Paste.
  • The only aggregation functions provided are those supported natively by SQLite: min, max, sum, count.
  • There is no support for interactive filtering of data.
  • Due to an outstanding issue, opening Tad multiple times will result in multiple instances of Tad starting (and appearing in the Dock).

This is an initial release, so there is a reasonable chance you'll encounter bugs, UI annoyances, and corner cases. Please report them via Help...Send Feedback.

If you're comfortable with the above, please...

Download for Mac


To send feedback or report bugs, please email tad-feedback@tadviewer.com.

To learn about new releases of Tad, please sign up for the Tad Users mailing list.

This is a low bandwidth list purely for Tad-related announcements; no spam. Your email will never be used for third party advertising and will not be sold, shared or disclosed to anyone.

Release Notes

Tad 0.8.3 - April 17, 2017

New Features
  • Tad can now be used to explore saved sqlite3 database files. For example, to explore table expenses in sqlite db file /data/accounts.sqlite:
    $ tad sqlite:///data/accounts.sqlite/expenses
    (Note that there are 3 slashes following sqlite:)

Tad 0.8.2 - April 12, 2017

Bug Fixes
  • Fix critical bug in pivoting by non-text columns

Tad 0.8.1 - April 9, 2017

New Features
  • Add support for Tab Separated Value (.tsv) files
Bug Fixes
  • Fix numerous issues with scrollbars and resizing of main window
  • Better support for long column names / many columns

Tad 0.8.0 - April 5, 2017

(Initial Public Release)