Extractor
Extractor is a Burp Suite tool that allows users to define one or more decode steps and automatically apply them to all requests and responses. Users can then alter the decoded payload to have it properly re-encoded and injected back into the request. (This applies to modifiable requests, such as in the Repeater tab.)
To download the tool, visit: https://github.com/nccgroup/Extractor
Learn more about Extractor in Nicolas Bidron’s blog post: Extractor: Automating Repetitive Decoding and Re-Encoding for Burp Suite