TinyPNG API Python module and command line tool for api.tinypng.org Important: You require an API key which you may obtain from email@example.com (as of October 2012). Besides specifying keys via command line arguments you can 1. Set the environment variable TINYPNG_API_KEY 2. Create a .tinypng.keys file in your home directory 3. Create a tinypng.keys file in the current directory Keyfiles must have one key per line. Invalid keys should be removed as they slow down requests.