Prerequisites:

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Initialize Infisical for your Next.js app

# navigate to the root of your of your project 
cd /path/to/project

# then initialize infisical
infisical init

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Start your application as usual but with Infisical

infisical run -- <your application start command>

# Example
infisical run -- npm run dev

Note that for environment variables to be exposed to the client, you’ll have to prefix them with NEXT_PUBLIC_. Read more about that here.