---
description: Deploy a Sandbox Worker and keep the npm package and container image on the same release line.
title: Deploy a Sandbox application
image: https://developers.cloudflare.com/og-docs.png
---

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> Documentation Index  
> Fetch the complete documentation index at: https://developers.cloudflare.com/sandbox/llms.txt  
> Use this file to discover all available pages before exploring further.

# Deploy a Sandbox application

Last updated Aug 24, 2026|Copy as Markdown|[View as Markdown](https://e8aee267.previews.developers.cloudflare.com/sandbox/guides/deploy/index.md)|[Agent setup](https://e8aee267.previews.developers.cloudflare.com/agent-setup/)

Sandbox runs on [Containers](https://e8aee267.previews.developers.cloudflare.com/containers/). For deploy commands, Workers Builds, and rollout flags, refer to [Deploy Containers](https://e8aee267.previews.developers.cloudflare.com/containers/deploy/) and [Rollouts](https://e8aee267.previews.developers.cloudflare.com/containers/platform-details/rollouts/).

To put `exposePort()` on a custom domain, refer to [Configure preview URLs on a custom domain](https://e8aee267.previews.developers.cloudflare.com/sandbox/guides/preview-urls-custom-domain/).

Sandbox SDK 1.0 preview

This guide targets the stable `@cloudflare/sandbox` package.

On **`@cloudflare/sandbox@next`**, keep the Worker package and container image on the same preview line. For a breaking cutover, refer to [Migrate](https://e8aee267.previews.developers.cloudflare.com/sandbox/1-0-preview/migrate/#deploy-the-cutover).

## Keep the package and image aligned

The Worker depends on `@cloudflare/sandbox` (or `@cloudflare/sandbox@next`). The container image must come from the same release line (Dockerfile and base image tags from the template or docs for that version).

When you bump the npm package:

1. Update the Dockerfile or image reference for the same line.
2. Run `wrangler deploy` so the new image is published.
3. If the Worker and image must cut over together, deploy with an immediate rollout:  
npmyarnpnpm  
```  
npx wrangler deploy --containers-rollout=immediate  
```  
```  
yarn wrangler deploy --containers-rollout=immediate  
```  
```  
pnpm wrangler deploy --containers-rollout=immediate  
```  
Use this for stable to `@next` cutovers and other breaking package/image pairs. Refer to [Migrate](https://e8aee267.previews.developers.cloudflare.com/sandbox/1-0-preview/migrate/#deploy-the-cutover) and [Rollouts](https://e8aee267.previews.developers.cloudflare.com/containers/platform-details/rollouts/).

Do not mix a stable package with a `@next` image, or the reverse.

## Deploy from your machine

1. Start Docker if `image` is a Dockerfile path. Registry image references do not need Docker at deploy time.
2. From the project root:  
npmyarnpnpm  
```  
npx wrangler deploy  
```  
```  
yarn wrangler deploy  
```  
```  
pnpm wrangler deploy  
```
3. Confirm the Worker URL responds, then exercise a sandbox route.

The first deploy can take several minutes while the image provisions.

## Workers Builds

For production, use `wrangler deploy` so the package and image can update together.

Non-production Workers Builds defaults to `wrangler versions upload`, which does not publish a new image. [Preview URLs](https://e8aee267.previews.developers.cloudflare.com/workers/versions-and-deployments/preview-urls/) are not generated for these Workers (they implement Durable Objects). Test with `wrangler dev`, or with a staging Worker or [environment](https://e8aee267.previews.developers.cloudflare.com/workers/ci-cd/builds/advanced-setups/#wrangler-environments) that runs `wrangler deploy`.

More detail: [Before production](https://e8aee267.previews.developers.cloudflare.com/containers/deploy/#before-production).

## Related

* [Deploy Containers](https://e8aee267.previews.developers.cloudflare.com/containers/deploy/)
* [Rollouts](https://e8aee267.previews.developers.cloudflare.com/containers/platform-details/rollouts/)
* [Configure preview URLs on a custom domain](https://e8aee267.previews.developers.cloudflare.com/sandbox/guides/preview-urls-custom-domain/)
* [Migrate to Sandbox SDK 1.0 preview](https://e8aee267.previews.developers.cloudflare.com/sandbox/1-0-preview/migrate/)

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