# Self-hosted diagram renderer

Text diagrams are normally drawn by our rendering service. If your policy says diagram source must not leave your network, point the app at your own Kroki-compatible server instead.

Everything else stays the same: the same languages, the same editors, the same storage in your Confluence site.

---

## When you would change this

* Regulated environments where source may not leave the network.
* Organisations with an existing Kroki deployment.
* Air-gapped or heavily restricted networks.

---

## What you can set

| **Setting**   | **What it does**                                                           |
| ------------- | -------------------------------------------------------------------------- |
| Requirement   | A Kroki-compatible server reachable from your users' browsers.             |
| Configuration | The renderer URL, set in site settings.                                    |
| Egress        | The renderer's domain must be approved as an egress domain.                |
| Scope         | Text languages only. draw.io and Excalidraw already render in the browser. |

---

ℹ️

**This is the answer to the hardest security question.** Combined with source stored in your own Confluence site, a self-hosted renderer means diagram content never reaches us at all.

---

## A few things that catch people out

* The server must be reachable from the reader's browser, not only from your data centre.
* Version differences between your Kroki and ours can render the same source slightly differently.
* If the renderer is unreachable, diagrams fail to draw rather than silently falling back to ours.

---

## Related

[Turn off AI featuresOne switch, three surfaces.](https://help.gocapable.com/diagrams/turn-off-ai-features.html)

[Diagram settings overviewWhere the settings live, and which wins.](https://help.gocapable.com/diagrams/diagram-settings-overview.html)

[ExamplesWorking diagrams you can copy.](https://help.gocapable.com/diagrams/examples.html)

---

_Set it once, in the right place._