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JS-Confuser

Free#26 of 34 in Code Obfuscation Software

JS-Confuser: A free, focused choice for teams protecting JavaScript without a paid plan. Ranked #26 of 34 in Code Obfuscation Software by our editors (6.7/10); pricing: Free plan; best for small teams seeking simple free JavaScript protection.

6.7/10Editor score

Visit JS-Confuser

JS-Confuser6.7 Visit JS-Confuser

At a glance

Editor score
6.7 / 10
Pricing
Free plan
Best for
Small teams seeking simple free JavaScript protection
Free plan
Yes
Paid from
Free
Anti-tamper controls
Yes
Founded
2020
Facts checked
21 Sep 2026

Where it wins
- Free and open source under the MIT license
- Combines renaming, control-flow, string and function obfuscation
- Offers a browser playground and programmatic npm API
Where it doesn't
- Feature and integration breadth is narrower than some alternatives
- Focused on JavaScript, Node.js and browser targets
- Founded in 2020, with a shorter operating history

Our verdict on JS-Confuser

JS-Confuser is an open-source JavaScript obfuscation tool for developers protecting browser and Node.js code. It transforms source through variable renaming, control-flow obfuscation, string concealing and function obfuscation using runtime-generated functions. The documented targets cover JavaScript, Node.js and browser applications, making it a focused fit for small teams that need code protection without a paid plan. Its hybrid deployment model supports browser-based work as well as programmatic use through npm.

The feature set covers several core obfuscation and anti-tamper needs. In addition to renaming and control-flow changes, JS-Confuser includes string concealing, runtime-generated functions, tamper protection, integrity checks and runtime locks. These capabilities give developers multiple ways to make source code harder to inspect or modify. The browser-based playground provides an accessible place to work with the tool, while the npm API supports integration into JavaScript-oriented build processes and other automated workflows.

JS-Confuser is most suitable when a team values a free, open-source tool with a clear JavaScript focus and a straightforward choice between browser and API access. Its narrower feature and integration breadth may make it less suitable for organizations seeking a broader code-protection ecosystem or a longer operating history; the project was founded in 2020. Teams working primarily with JavaScript, Node.js or browser code should find the scope aligned with their targets, while teams needing protection beyond those environments should consider a more broadly focused alternative.

Your product? Our editors can test JS-Confuser in depth and publish a review, labelled as paid · from $149/mo →

JS-Confuser pricing

Plans Free planFree Free to use — no paid tier required for the core job.

See plans on js-confuser.com

JS-Confuser fact sheet

Free plan	Yes
Paid from	Free
Supported targets	JavaScript, Node.js, browser
Anti-tamper controls	Yes
Control-flow obfuscation	Yes
String encryption	Yes
Deployment model	Hybrid
Build integration	Api
Deployment	Cloud, Self-hosted
Platforms	Web
Support	Community, Docs
Built for	Solo, Small business (editorial estimate)
Pricing	Free plan
Website	js-confuser.com
Facts checked	21 Sep 2026

Alternatives to JS-Confuser

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Featured on iTechGuides

JS-Confuser is listed in our Code Obfuscation Software directory. Add the badge to your site — it links back to this page.

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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

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Last updated 7 Oct 2026 · How we research and update