CasualConc is a concordance program that runs natively on Mac OS X 10.9 or later (an older beta version can run on 10.6.8 or later). It was originally designed for casual use (preliminary analysis or non-research purposes), though I've been using it for my own research (and may others have). It can generate kwic concordance lines, word clusters, collocation analysis, and word count. This program is only tested with English text just because that is the only language I can understand other than Japanese (though I heard from some people that CasualConc works ok with other European languages, such as Greek, Italian, etc.). If you use CasualConc with languages other than English, let me know how it works.

If you prefer to read in Japanese, 日本語サイトもあります。

ATTENTION: If you updated R to 3.3, you need to uncheck/check Use R for Visualization to re-install necessary packages. If you have problem with Visualization tools after you updated R to 3.3, you might need to re-install some packages.


What's new

  • CasualConc (2017/06/09) I received a few bug reports, so I fixed some of them. Also I've started working on some experimental features.Bug FixesFile Info- Standard TTR values were doubled ...
    Posted Jun 8, 2017, 8:56 AM by Yasu Imao
  • CasualConc (2.0.6 20170225) I fixed a few bugs that caused crashes.- Crashed when searching in Concord with tags recognized- Crashed when creating word lists/collocation lists/etc. with Language Specific Case Sensibility is ...
    Posted Feb 24, 2017, 8:33 PM by Yasu Imao
  • CasualConc (2.0.6 20160918) Features - now being able to delete graphs from the graph result table Bug FixRandom Forest - error when # of items is larger than the variables in the dataMan-Whitney ...
    Posted Jun 8, 2017, 8:40 AM by Yasu Imao
  • CasualConc 2.0 Manual is updated CasualConc 2.0 manual is updated to reflect the recent changes and new experimental features.
    Posted May 29, 2016, 8:16 AM by Yasu Imao
  • CasualConc 2.0 (2.0.5 20160527) I have fixed bugs and added a few experimental features in the last couple of weeks.Bug fixesCollocationstats columns were displayed at the right end of the table ...
    Posted May 26, 2016, 5:02 PM by Yasu Imao
Showing posts 1 - 5 of 103. View more »

Current Version: 2.0.7 (for OS X 10.9 or later) - last updated on 2017/06/09

System requirement: Mac with Mac OS X 10.9 or later with plenty of memory.

For more information about recent changes, check What's New.

This new version (2.0) has visualization functions using the statistical environment R (needs to be installed separately).

The following samples are created entirely on CasualConc 2.0 (with R in the background).

 Cluster Analysis  Word Cloud
 Radar Chart  Correspondence Analysis (row scores; 3D)

 Network Analysis Heat Map

Old Version for Yosemite/El Capitan1.9.8 (for OS X 10.9 or later) - last updated on 2015/05/09
Old Version for Snow Leopard: 1.9.7 (for OS X 10.6.8 - 10.9) - last updated on 2014/12/05

System requirement (Old Beta): Mac with Mac OS X 10.6.8 or later with plenty of memory.

NOTE: If you use Lion or Mountain Lion, try beta and follow the instruction on the download page.

File format: works best with plain text files (.txt) encoded in ASCII or UTF-8, but can handle other file types and other encodings (see Preferences - Files).  Reading non-plain text files will take more time to process.  PDF files should be text-embedded.  You can create database files from these file types except for PDFs for faster search.  Check How to Use for more information.

Supported languages: any single-byte character language separated by single-byte space.  Double-byte character language (East Asian languages) is also supported now, but you need to specify the language setting in Preferences to use with Japanese (or other East Asian Languages).

Target User: Mac users who don't want to start up Windows machine, switch to BootCamp, or run Virtual PC/Parallels/VM Ware for simple concordancing for preliminary analysis, preparing teaching materials, learning, etc. (CasualConc is probably not good enough as your primary research tool)

If you use CasualConc, please send me any feedback, bug report, or feature request.  Any comment will motivate me to improve CasualConc.  Please email me at casualconc (at) (replace  (at)  with @).

By the way, CasualConc is freeware, but if you think it is useful, buy me coffee or good chocolate if we ever meet : ).


Currently, 7 other language-related applications are also on this site.  They require Mac OS X 10.6 Snow Leopard (some require 10.7 Lion) and are also freeware. 

These are:

CasualPConc - a simple parallel concordancer

CasualMultiPConc - a more basic parallel concordancer, but can handle parallel corpora up to 5.

CasualTagger - a tagging helper (?) application to assist tagging your corpus (includes English POS tagging with EngTagger or rbtagger); batch processing available.

CasualTextractor - a kind of file converter, extracting text information from Word/PDF/HTML etc files and save as plain text files.  This also converts text encodings of plain text files.

CasualTranscriber - a transcription helper to assist transcribing video/audio files

CasualMecab - a Japanese POS/morphological analyzer using Mecab (MeCab and MeCab-Ruby need to be installed separately); batch processing available.

CasualTreeTagger - a GUI front end of TreeTagger.

IPATypist - a helper application to type IPA characters.