Next.js collects completely anonymous telemetry data about general usage. Participation in this anonymous program is optional, and you may opt-out if you'd not like to share any information.
Next.js has grown considerably since its release, becoming the de-facto React Framework for developers.
Prior to telemetry collection, our improvement process has been very much a manual one.
For example, Vercel dogfoods many large React applications (e.g. https://vercel.com/, https://vercel.com/docs, https://nextjs.org). Additionally, we actively engage with the community to gather feedback.
However, this approach only allows us to collect feedback from a subset of users. This subset may have different needs and use-cases than you.
Telemetry allows us to accurately gauge Next.js feature usage, pain points, and customization across all users.
This data will let us better tailor Next.js to the masses, ensuring its continued growth, relevance, and best-in-class developer experience.
Furthermore, this will allow us to verify if improvements made to the framework are improving the baseline of all applications.
We track general usage information, such as Next.js plugins and build performance. Specifically, we track the following anonymously:
next dev, or
next build and size of application (total number of pages)
Note: This list is regularly audited to ensure its accuracy.
You can view exactly what is being collected by setting the following environment variable:
When this environment variable is set, data will not be sent to us. The data will only be printed out to the stderr stream, prefixed with
An example telemetry event looks like this:
We do not collect any metrics which may contain sensitive data.
We take your privacy and our security very seriously. Next.js telemetry falls under the security disclosure policy.
The data we collect is completely anonymous, not traceable to the source, and only meaningful in aggregate form.
No data we collect is personally identifiable.
In the future, we plan to share relevant data with the community through public dashboards (or similar data representation formats).
You may opt out-by running
next telemetry disable in the root of your project directory:
npx next telemetry disable
yarn next telemetry disable
You may check the status of telemetry collection at any time by running
next telemetry status in the root of your project directory:
npx next telemetry status
yarn next telemetry status
You may re-enable telemetry if you'd like to re-join the program by running the following in the root of your project directory:
npx next telemetry enable
yarn next telemetry enable
You may also opt-out by setting an environment variable: