---
title: Configuration · Cloudflare Sandbox SDK docs
description: Configure your Sandbox SDK deployment with Wrangler, customize
  container images, and manage environment variables.
lastUpdated: 2025-10-28T17:02:39.000Z
chatbotDeprioritize: false
source_url:
  html: https://developers.cloudflare.com/sandbox/configuration/
  md: https://developers.cloudflare.com/sandbox/configuration/index.md
---

Configure your Sandbox SDK deployment with Wrangler, customize container images, and manage environment variables.

[Wrangler configuration](https://developers.cloudflare.com/sandbox/configuration/wrangler/)

Configure Durable Objects bindings, container images, and Worker settings in wrangler.jsonc.

[Dockerfile reference](https://developers.cloudflare.com/sandbox/configuration/dockerfile/)

Customize the sandbox container image with your own packages, tools, and configurations.

[Environment variables](https://developers.cloudflare.com/sandbox/configuration/environment-variables/)

Pass configuration and secrets to your sandboxes using environment variables.

[Sandbox options](https://developers.cloudflare.com/sandbox/configuration/sandbox-options/)

Configure sandbox behavior with options like `keepAlive` for long-running processes.

## Related resources

* [Get Started guide](https://developers.cloudflare.com/sandbox/get-started/) - Initial setup walkthrough
* [Wrangler documentation](https://developers.cloudflare.com/workers/wrangler/) - Complete Wrangler reference
* [Docker documentation](https://docs.docker.com/engine/reference/builder/) - Dockerfile syntax
* [Security model](https://developers.cloudflare.com/sandbox/concepts/security/) - Understanding environment isolation
