What is Cloudflare Client-Side Security?

It scans JavaScript on your site for malicious behavior using ML and LLMs, monitoring changes and blocking threats — all via browser reports, no extra setup.

Is Cloudflare Client-Side Security free?

Yes, basic bundle's free with domain threat intel; Advanced now self-serve for proxied traffic.

Does Cloudflare Client-Side Security slow my site?

Nope — zero latency impact, works passively through CSP reports.

⚙️ DevOps & Platform Eng

Cloudflare Scans 3.5 Billion Scripts Daily — Now Free, But Is It Foolproof?

Cloudflare's scanning 3.5 billion scripts a day. They're making client-side security free — here's why devs should squint harder before celebrating.

DevTools Feed Apr 02, 2026 4 min read 12 views

Cloudflare dashboard alerting on malicious client-side script detection

⚡ Key Takeaways

Cloudflare now offers Client-Side Security free to all, scanning 3.5B scripts daily with AI-powered detection. 𝕏
LLM triage slashes false positives, but attackers will adapt — don't rely solely on it. 𝕏
Great for compliance like PCI DSS, but proxies traffic to Cloudflare, deepening lock-in. 𝕏

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#AI detection #Cloudflare #client-side security #malicious JavaScript

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Originally reported by Cloudflare Blog

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