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Maximum protection in every paid tier — protect more code from $29/mo
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Try the online obfuscator
Free preview · no signup · in your browser
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JavaScript protection since 2004
Protect the JavaScript your customers download.
Your browser code is visible to anyone who opens the page. JavaScript Obfuscator helps make that code difficult to read, copy, modify, and reuse while keeping it working for your real users. Try it online in seconds, then use the Windows app when you need to protect larger projects.
Fast online test Paste code, choose a preset, and see protected output immediately.
Desktop control Protect larger folders and embedded JavaScript from your own workstation.
Paid plans from $29 More monthly capacity and stronger protection for production code.
No source recovery Obfuscation is designed to make the original code impractical to reconstruct.
Before you publish
Turn readable JavaScript into protected code that is far harder to understand, copy, or tamper with.
2004
Protecting JavaScript for more than two decades.
Heritage
$29 = 1 GB
Entry paid plan with stronger protection included.
Pricing
Harder to read
Names, strings, and code structure are transformed.
Protection
2 easy starts
Use the online tool or download the Windows app.
Options
Trusted by product teams worldwide
Well-known organizations have used JavaScript Obfuscator to help protect code they publish.
Find Your Fit
Different projects need different levels of protection. Start with the situation that sounds closest to yours.
Recommended: Standard preset. A good first step when you want to make public code harder to copy and edit. The Free tier is enough to test it — no credit card required.
Open Standard Preset ›
Recommended: Maximum preset. Use the strongest preset when your code contains valuable business logic, pricing rules, licensing checks, or other work you do not want competitors to study. Available in every paid tier from $29/month.
Open Maximum Preset ›
Recommended: Desktop app + Maximum preset. Use the desktop app when you need to protect larger folders, repeat the same settings, or keep sensitive source code on your own workstation.
Pricing
Start free, then upgrade when you need more monthly capacity, larger files, or stronger protection. Pricing is published, so you can choose without a sales call.
Entry paid plan
Protect more code each month, with Maximum protection included from $29.
Start free
$0/month
Try the engine on real code with no credit card. Best for evaluation and single-file scripts.
Free forever
- 200 MB / month
- Up to 20 files per request
- Name mangling
- String encoding
- Browser-based tool only
Individual projects
$29/month
For people protecting real project files, not just trying a quick online sample.
Best for individual projects
- 1 GB / month · 5× Free
- Up to 50 files per request
- 10 MB max file size
- Maximum protection
- Domain & date locking
- Desktop app access
Most popular
$49/month
For teams protecting larger projects with shared settings and stronger controls.
Best for production teams
- 3 GB / month · 3× Basic
- Up to 1000 files per request
- 30 MB max file size
- Replace globals + protect members
- Dead-code insertion
- Advanced protection options
High-volume use
$99/month
The largest monthly quota and deepest protection options for bigger organizations.
Best for large projects
- 9 GB / month · 3× Corporate
- Up to 3000 files per request
- 120 MB max file size
- Flat transform + encrypted strings
- Embedded JavaScript file support
- Move-nested + best compression
Compare all four plans in detail ›
How To Use It
You do not need to redesign your website to use JavaScript Obfuscator. Try a short sample online, choose the protection level that fits, and use the desktop app when you need to protect more files at once.
Preview online
Paste a small piece of JavaScript, choose a preset, and see how the protected result looks before changing anything else.
Choose a preset
Use Standard for basic copy resistance, Balanced for stronger everyday protection, or Maximum for high-value production code.
Move to desktop
Protect folders, larger projects, and embedded JavaScript files from a local Windows app when the online tool is no longer enough.
Best for
Web apps, commercial widgets, licensing checks, client-side business logic, dashboards, games, and scripts you do not want copied easily.
What to expect
The protected code still runs in the browser, but it becomes much harder to read, rename, understand, or modify.
What Protection Changes
Readable browser code becomes hard-to-follow protected code.
JavaScript still has to run in the browser. Obfuscation helps by removing the easy clues people use to understand and reuse it.
Meaningful names disappear.
Helpful names like totals, discounts, checks, and user state are replaced with hard-to-read identifiers.
Important strings are hidden.
Text values and clues that make code easy to search are encoded before the file is published.
The structure is harder to follow.
Maximum protection changes how code flows, making casual reading and quick modification much more difficult.
// Before:
function calculateDiscount(customer) {
return customer.loyaltyLevel * 0.05;
}
// After protection:
var _0x31a=function(_0x4bd){...};
_0x31a('0x2f')[_0x31a('0x14')](_0x31a('0x08'));
Trust
Use the online tool for quick tests. Use the desktop app when you want source code to stay on your workstation. Either way, the product is clear about what it does and what it does not claim.
Online test available
Desktop app available
Published pricing
Online for samples
Paste code into the browser tool when you want a fast preview.
Desktop for sensitive work
Use the Windows app when you prefer to keep source files local.
No magic claims
Obfuscation raises the effort to understand code. It does not replace server-side authorization or access control.
Desktop App
Use the Windows desktop app when you prefer local processing, need to protect many files, or work with JavaScript embedded in HTML, PHP, ASP, ASPX, or JSP pages. It is the easiest next step after a successful online test.
Protect full folders instead of one file at a time
Works with embedded JavaScript in common web files
Keep sensitive source code on the workstation
Start Here
Most people start online, then move to the desktop app when they need to protect a real project. Paid plans add more monthly capacity and stronger protection.
Frequently Asked
Plain answers about what obfuscation does, what it cannot do, and which version to use first.
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Can AI tools or people still read my protected JavaScript?
Obfuscation makes the code much harder to understand.
It removes useful names, hides strings, and changes the structure of the file. It is not a promise that no one can ever study the code, but it raises the effort dramatically compared with publishing readable JavaScript.
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Is the original source recoverable from the obfuscated output?
No. The protected output does not contain your original comments, names, and readable structure. Anyone viewing the published file sees the transformed version, not a clean copy of your source.
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Can it protect JavaScript embedded in HTML, PHP, ASP, ASPX, or JSP files?
Yes. The desktop app can process mixed web files, including JavaScript inside HTML, PHP, ASP, ASPX, and JSP templates.
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Is Maximum protection included in the lower-priced plans?
Yes. Maximum protection is available in every paid tier starting at $29/month. You do not need an enterprise plan to use the strongest preset.
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Should I use the online tool or the desktop app?
Use the online tool for a quick test or small file. Use the desktop app when you need to protect larger folders, embedded scripts, or source code you prefer to keep on your own computer.
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Will obfuscation break my code or hurt runtime performance?
Obfuscation is designed to preserve behavior, but you should always test protected code before publishing it. Stronger settings can add some overhead, so choose the level that fits your project and test the final protected files in the browser.