Sentiment Analyzer — Free, No Upload, Browser-Based

Instantly score any text as positive, negative, or neutral using an AFINN-165 lexicon with negation and intensifier detection — all running locally in your browser. No text is ever uploaded to a server, making it safe for analyzing private feedback, emails, or sensitive communications. Paste any passage and see a normalized score, confidence level, and the individual words driving the result.

このツールの使い方

1. Paste or type the text you want to analyze into the input area — results update as you type.
2. Review the sentiment label (Positive, Negative, or Neutral), the normalized score from -1 to +1, and the confidence level based on how many words matched the lexicon.
3. Inspect the top positive and negative signal words highlighted below the score bar, then copy the summary to your clipboard.