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← Release NotesDecember 2025

finix.js v2 update

We're excited to introduce Finix.js v2, a major upgrade to our client-side tokenization library. This release focuses heavily on performance, security, modern web compatibility, and developer experience.

With a 10× smaller bundle, simplified configuration, improved validation, and a fully refreshed UI system, v2 makes it easier than ever to build secure, PCI-compliant payment flows across modern web applications.

What's New in v2

🚀 10× Smaller Bundle Size

Faster load times, reduced bandwidth usage, and dramatically improved behavior on slower networks and mobile devices.

✔️ Improved Form Validation

Enhanced client-side validation, including improved international card validation, bank-account validation, and real-time error feedback.

🌐 Shadow DOM and Web App Support

Full compatibility with web components, micro-frontends, and modern reactive frameworks.

🎨 New Pre-Built Themes + Dark Mode

Cleaner UI out of the box with theme presets (finix, amethyst, sapphire, etc.) and complete dark-mode support.

🛠️ Enhanced Customization

Improved styles and fonts APIs allow for even more brand-level customization.

When accepting ACH / bank payments, the form now automatically integrates with Plaid Link for a modern, secure bank-account experience.

Learn more about our finix.js v2 by visiting our tokenization form guide.