# Diagram editor will not open

The editors are large browser applications, and the two things that break them are stale cached assets and browser extensions that block scripts.

A hard reload fixes most of it. If it does not, try a private window, which rules out both extensions and cache in one step.

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## What you are seeing

* The editor spinner never finishes.
* The editor opens blank or half-drawn.
* The editor reloads itself and loses unsaved changes.

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## Work through these in order

| **Check**                                   | **What it means and what to do**                                                   |
| ------------------------------------------- | ---------------------------------------------------------------------------------- |
| Hard reload the page                        | Bypasses cached assets, which is the most common cause after a release.            |
| Try a private window                        | Rules out extensions and cache together. If it works here, it is one of those two. |
| Disable script and ad blockers for the site | Some blockers break large editor bundles in ways that look like a hang.            |
| Check the browser                           | Current versions of Chrome, Edge, Firefox and Safari are supported.                |
| Check the network                           | Corporate proxies that inspect or rewrite scripts can break the editor.            |

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## A few things that catch people out

* Saving is manual. If the editor reloads before you save, look for a draft snapshot before redrawing anything.
* An editor that opens for one person and not another on the same page usually points at the browser, not the diagram.
* If it fails in a private window, on a current browser, on a normal network, that is worth reporting.

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## Related

[Diagram is clipped or the wrong sizeCut off, squashed, or scrolling oddly.](https://help.gocapable.com/diagrams/diagram-is-clipped-or-the-wrong-size.html)

[A diagram language is missingIt is not in the picker.](https://help.gocapable.com/diagrams/a-diagram-language-is-missing.html)

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

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_Most of these take under a minute._