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Created September 13, 2012 11:34
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Custom log file syntax highlighting for Notepad++
<UserLang name="LogFile" ext="log">
<Global caseIgnored="yes" />
<TreatAsSymbol comment="no" commentLine="no" />
<Prefix words1="no" words2="no" words3="no" words4="no" />
<Keywords name="Delimiters">[(0])0</Keywords>
<Keywords name="Folder+"></Keywords>
<Keywords name="Folder-"></Keywords>
<Keywords name="Operators">&apos; - ! &quot; # $ % &amp; ( ) * , . / : ; ? @ [ \ ] ^ _ ` { | } ~ + &lt; = &gt;</Keywords>
<Keywords name="Comment">1 2 0</Keywords>
<Keywords name="Words1">ERROR</Keywords>
<Keywords name="Words2">WARN WARNING</Keywords>
<Keywords name="Words3">DEBUG</Keywords>
<Keywords name="Words4">INFO</Keywords>
<WordsStyle name="DEFAULT" styleID="11" fgColor="000000" bgColor="FFFFFF" fontName="" fontStyle="0" />
<WordsStyle name="FOLDEROPEN" styleID="12" fgColor="000000" bgColor="FFFFFF" fontName="" fontStyle="0" />
<WordsStyle name="FOLDERCLOSE" styleID="13" fgColor="000000" bgColor="FFFFFF" fontName="" fontStyle="0" />
<WordsStyle name="KEYWORD1" styleID="5" fgColor="FFFFFF" bgColor="FF0000" fontName="" fontStyle="1" />
<WordsStyle name="KEYWORD2" styleID="6" fgColor="FFFFFF" bgColor="FF8000" fontName="" fontStyle="1" />
<WordsStyle name="KEYWORD3" styleID="7" fgColor="FFFFFF" bgColor="FF80FF" fontName="" fontStyle="1" />
<WordsStyle name="KEYWORD4" styleID="8" fgColor="FFFFFF" bgColor="0080FF" fontName="" fontStyle="0" />
<WordsStyle name="COMMENT" styleID="1" fgColor="000000" bgColor="FFFFFF" fontName="" fontStyle="0" />
<WordsStyle name="COMMENT LINE" styleID="2" fgColor="000000" bgColor="FFFFFF" fontName="" fontStyle="0" />
<WordsStyle name="NUMBER" styleID="4" fgColor="000000" bgColor="FFFFFF" fontName="" fontStyle="0" />
<WordsStyle name="OPERATOR" styleID="10" fgColor="FF0080" bgColor="FFFFFF" fontName="" fontStyle="1" />
<WordsStyle name="DELIMINER1" styleID="14" fgColor="000000" bgColor="FFFFBF" fontName="" fontStyle="1" />
<WordsStyle name="DELIMINER2" styleID="15" fgColor="800000" bgColor="FFFFFF" fontName="" fontStyle="2" />
<WordsStyle name="DELIMINER3" styleID="16" fgColor="000000" bgColor="FFFFFF" fontName="" fontStyle="0" />
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Excellent addon.... Is it possible to highlight IP addresses?

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longtth commented Jan 12, 2018

work perfect, thanks!

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Thanks for that!

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Thanks for sharing

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Gus7av0 commented Feb 22, 2018


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Awesome! Thank you.

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how we can import this

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You can import a UDL file into Notepad++ as explained here:

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still working! thanks!.

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I like this way. Super thanks.

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Notepad++ says "Failed to Import".
Tried created a new UDL and pasting the content of this XML, it crashed the app and I lost all my unsaved notes!

Anyone else facing the similar problem?

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Can I add ? If so how?

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great job ! notepad++ x86 v7.9 still working !

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Working on 2021, for those who are wondering how to import this user-defined language here are the instructions.
Import the file: Language → Define your language... → Import
Restart the application.
Language → LogFile
Now logfile should be highlighted.

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joex92 commented Aug 17, 2021

Here I forked this and added the Dark Theme one too...

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mhewedy commented Nov 17, 2022

Another install option is to copy & paste into a new file with name log.udl.xml inside : path\to\Notepad++\userDefineLangs

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TFWol commented Nov 23, 2022


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mmdemirbas commented Oct 18, 2023

I'm not a big open-source contributor, but it is awesome to see this still helps people after 10 years 👐

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azozaya commented Feb 29, 2024

Fantastic! Thank you.

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