Original question was posed in 2017. Now, in 2024, 7 years later it is still not very clear how one applies a saved extraction regex to an existing search to extract fields from the search. Especially without access to the various server side configuration files. Splunk has grown long in the tooth, dementia encroaching. Reality: You probably can't do it simply. If you have a sourcetype X. The extractors you saved will only run against the base, plain data set sent as X, not against your search, and they run against the base sourcetype automatically. If it was going to work, it would already be working and you would already have your field. Now, if your search does any kind of transformations like for example pulling log fields out of JSON data using spath, messing around with _raw or similar, the extractor you created isn't going to run against that resulting data set. I know, I've tried. The extractors get applied before that part of the search runs. See: https://docs.splunk.com/Documentation/SplunkCloud/9.1.2312/Knowledge/Searchtimeoperationssequence You're going to have to go into Settings -> Fields -> Field Extractions and copy/paste the regex created by the web extractor page into your search and manually extract the field within your search using the "rex" command. You may have to tweak it slightly especially for quotes. It's a little disingenuous of the splunk web extraction generator to take the results of the current search as the input and imply that a saved extractor will actually operate against such a search and pull fields out for you. It doesn't. ... View more