Anti-Bot Protection
Stop Bots. Protect Your Site. Free.
WebDefender brings military-grade bot detection to small websites — proof-of-work challenges, browser fingerprinting, and automatic IP bans. No CAPTCHAs to solve. No friction for real users.
Live Demo Widget
The widget below runs a silent proof-of-work challenge right now. No clicks needed — watch it verify you're human automatically.
Proof-of-Work Captcha
FNV-1a PoW challenge solved silently in the browser — no image puzzles, no annoying clicks. Bots fail at the math.
Browser Signal Analysis
Canvas fingerprinting, WebGL detection, timing heuristics, and headless-browser flags — multi-layer bot scoring.
HMAC-Signed Tokens
Challenge and proof tokens are time-limited, HMAC-signed, and replay-protected. Each solve is one-time-use.
Rolling IP Bans
Repeated attack patterns trigger automatic IP bans. One-hit bans for known exploit paths like /.env or /wp-admin.
Drop-in Widget
One script tag. Works with any HTML form. Zero dependencies, < 4 KB gzipped. Integrate in minutes.
Built for Small Sites
Free tier covers small websites — no billing required. Sign up, get your site key, and protect your forms today.