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