JavaScript License Key Validator

📦 JavaScript Library

This is a JavaScript library, not a WordPress plugin. After purchase, you will receive a ZIP file containing the library files, documentation, and examples. You can use it in any web project (WordPress, React, Vue, vanilla JavaScript, etc.).

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Total: 9.99 $

What's Included:

✓ Instant download after payment

✓ Lifetime updates included

✓ Premium support access

✓ Unique purchase code

✓ Complete source code

✓ Full documentation & examples

✓ Use in any project (no WordPress required)

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JavaScript License Key Validator is a production-ready offline JavaScript library for generating, parsing, and validating license keys. No server required - works entirely client-side. Perfect for protecting software, PWAs, and offline-capable applications.

100% offline validation (no network requests)
Configurable format rules and checksum validation
Metadata embedding (product ID, edition, expiry)
Blacklist and allowlist support
No external dependencies (pure vanilla JavaScript)
UMD and ES module support
Complete source code and documentation
Lifetime updates
Premium support