Register the TSV Mime Type in `config/initializers/mime_types.rb` register the TSV mime type Mime::Type.register "text/tab-separated-values", :tsv Add to_csv and to_tsv to Arrays so as CSV and TSV renderers In `lib/csv_and_tsv_renderers.rb` # encoding: utf-8 # require 'csv' # adds a .to_csv method to Array instances class Array BOM = "\xEF\xBB\xBF" #Byte Order Mark UTF-8 alias old_to_csv to_csv #k