---
title: "Discussion on \"Client-side license checks in JavaScript: how they get cracked and how to harden them\" | Hashnode"
description: "Discussion on \"Client-side license checks in JavaScript: how they get cracked and how to harden them\". Most commercial JavaScript products eventually grow a function that reads a license and turns premium features on or off. When that function runs on the user's machine — in a browser, an Electron app,"
url: "https://hashnode.com/posts/client-side-license-checks-in-javascript-how-they-get-cracked-and-how-to-harden-them/6af3e8428bde9ebad6b0ea3a"
---

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# [Client-side license checks in JavaScript: how they get cracked and how to harden them](https://veilvm.hashnode.dev/client-side-license-checks-in-javascript-how-they-get-cracked-and-how-to-harden-them?utm_source=hashnode&utm_medium=feed)

Most commercial JavaScript products eventually grow a function that reads a license and turns premium features on or off. When that function runs on the user's machine — in a browser, an Electron app,

18h ago · 7 min read · veilvm.hashnode.dev  
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-   [#javascript](https://hashnode.com/tag/javascript)
-   [#security](https://hashnode.com/tag/security)
-   [#licensing](https://hashnode.com/tag/licensing)
-   [#web-security](https://hashnode.com/tag/web-security)
-   [#programming-ciovqvfcb008mb253jrczo9ye](https://hashnode.com/tag/programming-ciovqvfcb008mb253jrczo9ye)

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