Needle is a simple, portable utility for injecting code or text into other files or substituting a keyword.
Needle is designed to work with large files (about 1-5 GB in size).
Unlike traditional find/replace options in IDEs or your web browser, Needle can make changes swiftly and efficiently without the annoyance of lag or the risk of an application crash.
Disclaimer: The intended use for the tool is strictly educational and should not be used for any other purpose.
Download Link: https://github.com/OakAtsume/needle