Best Free Client-Side Protection Platforms
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Compare the Top Free Client-Side Protection Platforms as of October 2025
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What are Free Client-Side Protection Platforms?
Client-side protection platforms are security tools designed to protect users from threats that can arise when interacting with websites. These platforms monitor and secure the client-side environment, such as web browsers, against vulnerabilities like cross-site scripting (XSS), malicious JavaScript, and other client-side attacks. They provide features such as real-time threat detection, script monitoring, and content security policies (CSP) enforcement to ensure that the web content being loaded is safe and hasn't been tampered with. By securing the client side, these platforms help prevent data breaches, session hijacking, and unauthorized access to sensitive information during web interactions. This protection is crucial for maintaining the integrity and security of online user experiences. Compare and read user reviews of the best Free Client-Side Protection platforms currently available using the table below. This list is updated regularly.
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c/side
c/side
100 % session coverage, DOM-level diffing, conditional threat detection (geo/time/user cohort). c/side sits in the path of every third-party request, fetches the actual JavaScript, and inspects it in real time. So malicious code is blocked before the browser can execute a single line.">
Starting Price: $99 per month -
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Source Defense
Source Defense
Source Defense is a mission critical element of web security designed to protect data at the point of input. The Source Defense Platform provides a simple and effective solution for data security and data privacy compliance – addressing threats and risks originating from the increased use of JavaScript, third-party vendors, and open-source code in your web properties. The Platform provides options for securing your own code, as well as addressing a ubiquitous gap in the management of third-party digital supply chain risk – controlling the actions of the third-party, fourth and nth party JavaScript that powers your site experience. The Source Defense Platform protects against all forms of client-side security incidents – keylogging, formjacking, digital skimming, Magecart, etc. – by extending web security beyond the server to the client-side (the browser). -
3
Cloudflare
Cloudflare
Cloudflare is the foundation for your infrastructure, applications, and teams. Cloudflare secures and ensures the reliability of your external-facing resources such as websites, APIs, and applications. It protects your internal resources such as behind-the-firewall applications, teams, and devices. And it is your platform for developing globally scalable applications. Your website, APIs, and applications are your key channels for doing business with your customers and suppliers. As more and more shift online, ensuring these resources are secure, performant and reliable is a business imperative. Cloudflare for Infrastructure is a complete solution to enable this for anything connected to the Internet. Behind-the-firewall applications and devices are foundational to the work of your internal teams. The recent surge in remote work is testing the limits of many organizations’ VPN and other hardware solutions.Starting Price: $20 per website -
4
ByteHide
ByteHide
ByteHide is an all-in-one, developer-first application security platform designed to protect code, secrets, data, and runtime environments, while minimizing your dependencies and risk. It integrates seamlessly with your development workflows and communication tools, delivering key security insights and alerts without disrupting productivity. Operating under a zero-knowledge model, ByteHide uses client-side encryption so only you hold the keys, and it never stores your source code. With minimal, typically read-only permissions, you remain fully in control of what repositories and data sources are analyzed. ByteHide’s core tools include Shield for next-generation code obfuscation and anti-tampering, Secrets for AI-powered secret detection and decentralized management, Monitor for real-time runtime threat detection, and Radar for unified SAST/SCA scanning. These tools run in secure, isolated environments and automatically mask sensitive personal data.Starting Price: €39.99 per month -
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Javascript Obfuscator
Javascript Obfuscator
JavaScript Obfuscator transforms readable JavaScript source code into an obfuscated and unintelligible form, preventing reverse engineering, tampering, and intellectual property theft while preserving full functionality and compatibility with the latest ECMAScript versions. It includes powerful features such as minification and compression for reduced file size and faster load times, dead code insertion to confuse static analysis, and domain- or IP-based locking to disable code execution outside authorized environments. The tool provides GUI-driven desktop batch processing that allows users to protect JavaScript embedded in HTML, PHP, JSP, or similar files with just a few clicks, and supports keeping initial comments or inserting custom headers into output files. Advanced controls let you exclude certain names from obfuscation and ensure consistent symbol renaming across multiple files.Starting Price: Free -
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jsObf
jsObf
jsObf is a powerful, web-based JavaScript encryption and obfuscation tool that enables users to transform readable JavaScript code into obfuscated, secure versions via direct input or file uploads (up to 5 MB). It also serves developers through its API, offering two endpoints, one for raw code and another for file uploads, with configurable output formats (JSON or XML) and adjustable complexity levels. It simplifies protection workflows with intuitive, drag-and-drop interfaces and backend API support, empowering users to quickly mask logic, thwart reverse engineering, and secure proprietary scripts without complex setup or tooling.Starting Price: $49.99 per month -
7
JS-Confuser
JS-Confuser
JS-Confuser is a powerful, open source JavaScript obfuscation tool that transforms your source code into a highly unreadable form, deterring reverse engineering, tampering, and unauthorized reuse while preserving full functionality. It offers multiple obfuscation techniques, including variable renaming, control flow flattening, string concealing, and function obfuscation, along with locks such as domain-based or date-based execution constraints and integrity checks to detect runtime modifications. Designed for flexibility, it provides obfuscation presets, ranging from 10 to 21+ transformation layers, and also allows fully customizable configurations to suit performance and protection needs. The tool operates entirely in the browser for fast, private obfuscation workflows, and includes advanced tooling features such as a playground for interactive experimentation, customizable options via JavaScript, integrated code prettification, and debugging support.Starting Price: Free -
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Feroot
Feroot Security
Feroot believes that businesses and their customers should be able to engage in a safe and secure online user experience. Whether it’s leveraging the purchasing power of an e-commerce website, accessing internet-based healthcare services, or transferring funds between financial accounts, Feroot's sole mission is to secure client-side web applications so that users can engage safely in online environments. Our products help organizations uncover supply chain risks and protect their client-side attack surface. With Feroot Inspector, businesses can scan, monitor, and enforce security controls to prevent data loss incidents within software logic on the front end caused by compromised JavaScript, third parties and configuration weaknesses. Our data protection capabilities significantly minimize time- and labor-intensive code reviews and threat analysis, and remove the ambiguity associated with client-side security detection, response, and prevention.
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