Tweezer is a Twitter sentiment analysis tool that classifies tweets as positive, negative, or neutral based on a query term entered by the user. It collects relevant tweets through Twitter's API, pre-processes the tweets by removing emojis, URLs, stop words, usernames and hashtags. It then classifies the sentiment through either binary, 3-tier, or 5-tier classification methods. The tool detects sarcasm using techniques like identifying positive words with negative emojis. Future work includes improving pre-processing, updating the sentiment dictionary, creating a mobile app, and adding context to sentiment analysis.