i know this is old but i figured i put this here for anyone else having issues. yes there is a way to up this 10MB limit assuming your using the lookup editor app https://splunkbase.splunk.com/app/1724/ the limit was put in the app because of browser memory issues back in 2017.  so long as you know that and modify the app at your own risk. change the settings.py file and make it what you want it to be. the source code for the file is here. https://github.com/LukeMurphey/lookup-editor/blob/master/src/bin/lookup_editor/settings.py you will need to go into the app directory and update it. hope this helps anyone else having this Unique issue. though that all being said. you might look at the reasons why your CSV is getting that large and make efforts and reducing it or changing it over to another method to keeping the data in splunk. - Joshua Millikan ... View more