Show HN: Chrome extension that flags propaganda techniques locally

Category: ai-ml

Tags: chrome-extension, nlp, media-literacy, propaganda-detection, local-inference, privacy

Score: 5.7/10 (Innovation: 6, Technical: 6, Documentation: 7, Utility: 5)

PropaLens is a Chrome extension that locally detects 14 known persuasion techniques in news articles using fine-tuned MiniLM and XLM-RoBERTa models. It highlights flagged sentences with hover explanations and adjustable strictness, keeping all processing on-device for privacy. The project is interesting for its practical application of NLP to media literacy, though precision (58–60%) limits reliability.

Target audience: general readers, media literacy educators, NLP practitioners

Repository: https://propalens.com/

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