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Flags SDK by Vercel

Free, open-source library for using feature flags in Next.js

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From the creators of Next.js, the Flags SDK is a free open-source library for implementing feature flags and A/B tests in your applications. Works with any flag provider or custom setup. Compatible with App Router, Pages Router, and Middleware.

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@Vercel is cooking.


@rauchg just announced Flags SDK, a free, open-source library for using feature flags in Next.js and SvelteKit. Compatible with App Router, Pages Router, and Middleware, the Flags SDK works with any feature flag provider — @LaunchDarkly or @Bucket (spoiler alert: soon) — or custom setup.

Happy shipping!

Comment highlights

Vercel alwayd keeps pushing the envelope! A free, open-source feature flag solution that works seamlessly with Next.js and SvelteKit is a solid win for developers.


Congrats on the launch!

Best wishes and sending lots of wins to the team :)

Awesome launch @Flags SDK by Vercel ! 🚀 Any plans for built-in A/B testing support with analytics integration?