Open-source Chrome extension that detects bot and shill accounts on Reddit in real-time as you browse.
- You browse Reddit normally
- Shill Shield analyzes every commenter's public posting history
- Colored badges appear next to usernames showing bot probability
- Click any badge for a detailed signal breakdown
| Signal | What It Detects |
|---|---|
| Posting regularity | Bot-like mechanical posting cadence |
| Active hours | Accounts active 16+ hours/day |
| Promo density | Repeated links to the same domain |
| Reply ratio | Accounts that only reply, never post |
| Subreddit diversity | Campaigns targeting few subreddits |
| Account age | New accounts (<30 days) |
| Comment similarity | Template-based repetitive comments |
| Karma ratio | Low karma relative to activity |
- Clone this repo
- Open
chrome://extensions/ - Enable "Developer mode"
- Click "Load unpacked"
- Select the
shill-shieldfolder - Browse Reddit — badges appear automatically
- All analysis runs locally in your browser
- No data is sent to any server
- User data is fetched from Reddit's public JSON API
- Cached results are stored in local browser storage (24hr TTL)
- Chrome Extension Manifest V3
- Zero dependencies
- Pure JavaScript, no build step
MIT