HumanSignal

See which LinkedIn posts feel genuinely human. On-device AI detection. No data leaves your browser.

LinkedIn has never been noisier. Thoughtful takes and real experiences are mixed in with posts that were clearly drafted in 30 seconds with a prompt. It's hard to tell the difference at a glance — and it's exhausting to try. HumanSignal quietly labels every post and comment as you scroll. No popups, no sign-in, no settings to figure out. Just a small badge that tells you whether what you're reading feels like a real person wrote it. How it works A fast rules engine scores each post the moment it loads. An on-device AI model (RoBERTa, running entirely in your browser) refines the result within a few seconds. The badge updates — from "Possibly AI" to "Feels Human" or "Likely AI" — as confidence improves. Everything stays on your device The AI model runs locally. No text is sent anywhere. HumanSignal doesn't have a server, doesn't collect analytics, and doesn't know you exist. What the labels mean — Feels Human: specific, personal, grounded in experience — Possibly AI: generic or templated, but could go either way — Likely AI: strong structural signals of AI-generated text — Almost Certainly AI: high-confidence detection It's not perfect. No detector is. But it's honest about that — labels come with confidence levels, and you can always dismiss a badge you disagree with.