---
title: Client-Side Security Protection
description: Protect your end-users against malicious compromises with Page Shield, a client-side security solution that defends websites against attacks targeting vulnerable JavaScript dependencies and maintains compliance.
image: https://www.cloudflare.com/preview.png
---

 Client-Side Security 

##  Protect your users from client-side threats 

###  Page Shield continuously monitors and prevents client-side threats, defending websites against attacks targeting vulnerable JavaScript dependencies and helping maintain compliance with frameworks like PCI DSS and the GDPR. It offers intelligent browser supply chain protections to keep your end users safe, backed by world-class threat intelligence and machine learning capabilities. This comprehensive solution helps prevent the theft of personal and financial information of your users. 

[  Start building for free ](https://dash.cloudflare.com/sign-up) [  View docs ](https://developers.cloudflare.com/page-shield) 

**Protection Against Client-Side Threats** 

Page Shield continuously monitors and prevents client-side threats, defending websites against attacks targeting vulnerable JavaScript dependencies, such as Magecart-style attacks that exfiltrate user data and cryptojacking attacks. This includes detecting compromised third-party scripts and providing alerts to prevent the theft of customer data. 

**Real-Time Threat Detection and Alerts** 

Page Shield provides automatic alerts for any suspicious script activity, using machine learning and Cloudflare's industry-leading threat intelligence to instantly identify, report, and block threats before they can affect the website or its visitors. This real-time threat detection helps prevent browser supply chain attacks and protects users from financial data theft. 

**Compliance and Data Protection** 

Page Shield helps web apps maintain compliance with frameworks like PCI DSS and the GDPR by assisting with meeting client-side security requirements. It detects compromised third-party scripts and provides alerts to prevent the theft of customer data, ensuring a secure environment for users. 

### Intelligent Browser Supply Chain Protections

Backed by world-class threat intelligence and machine learning capabilities, Page Shield helps defend against client-side attacks that target vulnerable JavaScript dependencies.

![Background Pattern](/static/pattern.png) 

####  Top Client-Side Security Use Cases 

 Protect your users and maintain compliance with industry standards 

[  Talk to an expert ](https://developers.cloudflare.com/) 

 Protect Customer Data from Theft 

Page Shield helps prevent the theft of personal and financial information of your users by blocking browser-based attacks targeting vulnerable JavaScript dependencies, such as Magecart-style attacks that exfiltrate user data. This includes detecting compromised third-party scripts and providing alerts to prevent data breaches. 

 Maintain Compliance with Regulations 

Page Shield assists with meeting compliance requirements like PCI DSS and GDPR by detecting compromised third-party scripts and providing alerts, helping web apps maintain a secure environment for their users. This comprehensive solution ensures that your website meets the necessary security standards. 

 Prevent Browser Supply Chain Attacks 

Page Shield continuously monitors a website's third-party scripts and loaded dependencies for signs of malicious activity or compromise, preventing browser supply chain attacks and protecting users from financial data theft. This proactive approach helps prevent the exploitation of vulnerabilities in JavaScript dependencies. 

 Enhance Website Security 

Page Shield offers protection that goes beyond a standard Content Security Policy (CSP) by actively monitoring JavaScript dependencies and using advanced threat intelligence and machine learning to detect and block threats. This comprehensive security solution helps ensure the integrity of your website and protects your users. 

 Shopify 

#### "

####  Cloudflare helps us solve the hard part—safe extensibility at scale—so our teams can focus on merchant experience, not infrastructure. " 

![Duncan Davidson](/people/duncan-davidson.png) 

 Duncan Davidson  VP of Developer Productivity 

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# Build without boundaries

 Join thousands of developers who've eliminated infrastructure complexity and deployed globally with Cloudflare. Start building for free — no credit card required. 

[  Start building for free ](https://dash.cloudflare.com/sign-up) [  View docs ](https://developers.cloudflare.com/) 

 No cold starts or region complexity  SASE and Zero Trust without the complexity  Deploy to 330+ cities instantly  Defend against the Internet's biggest DDoS attacks  Predictable pricing without surprises  Identity-aware Zero Trust access that retires your VPN  Battle-tested infrastructure powering millions  CDN, WAF, and DNS faster than the public Internet  No cold starts or region complexity  SASE and Zero Trust without the complexity  Deploy to 330+ cities instantly  Defend against the Internet's biggest DDoS attacks  Predictable pricing without surprises  Identity-aware Zero Trust access that retires your VPN  Battle-tested infrastructure powering millions  CDN, WAF, and DNS faster than the public Internet 

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