You could upload your Twitter archive files as compressed zip files. We support Zip and Gzip formats.
Use your favorite Zip program to compress the Tweet.js file and rename the zip file with one of these;
The archive file should include "tweet.js" in it. We discard any files other than Tweet.js in the uploaded archive file.
Once you are done with creating an archive file, please upload the file, as usual, we'll take care of the rest.