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I'm trying to find the dictionary file for Google Chrome on OS X - I'd like to remove certain words from the dictionary so that I don't use them when writing email (such as 'foolish' for example).

In Firefox, this was a simply a matter of editing the dictionary file, but I'm not sure were I would find it in Chrome?

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3 Answers

up vote 5 down vote accepted

It doesn't appear that there is a user-editable file with the default dictionary in it. I just looked through the .app folder and saw nothing like a dictionary. Also, ~/Library/Application\ Support/Google/Chrome/Dictionaries/ doesn't list any dictionaries.

OS X

The file is for the custom dictionary:

/Users/username/Library/Application Support/Google/Chrome/Custom Dictionary.txt

Windows XP and Windows 7/Vista

It appears it's in (for Windows XP and Vista/7, respectively):

C:\Documents and Settings\%USERNAME%\Local Settings\Application Data\Google\Chrome\User Data\Custom Dictionary.txt
C:\Users\%USERNAME%\AppData\Local\Google\Chrome\User Data\Custom Dictionary.txt
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+1 - Cheers for this answer. –  boehj Jul 8 '11 at 1:34
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For future reference, I found it under:

/Users/username/Library/Application Support/Google/Chrome/Default/Custom Dictionary.txt

OSX Lion 10.7.4
Chrome 19.0.1084.56
June 2012

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This accepted answer is incorrect or out-of-date w/r/t Google Chrome on Windows. This is where Google Chrome version "31.0.1650.63 m" actually stores the custom dictionary:

\Users\%USERNAME%\AppData\Local\Google\Chrome\User Data\Default\Custom Dictionary.txt

It's just a text file, with LF-only line terminations, and a list of words in case-sensitive alphabetical order, one per line. There's a checksum at the end, with no LF at the end of that line.

There's also a backup version, in the same folder, named "Custom Dictionary.txt.backup".

According to this https://chromiumcodereview.appspot.com/11414282 if the checksum fails to match in the regular version of the Custom Dictionary, and there's a backup version with a correct checksum, Chrome will silently discard the regular version and revert to the backup version.

Maybe that's be why Chrome keeps losing my custom dictionary words. :-(

So I think if you want to edit the custom dictionary file (e.g., to remove misspelled words), you'll need to delete the backup version, to prevent Chrome from reverting to it. (Note: I've not actually done this.)

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