# Retool: Major incident: Retool Mobile apps cannot be opened in the in-browser preview

**Summary:** Retool Mobile apps failed to load in browser user-mode and editor previews during a major outage starting 2026-06-04 15:13 UTC, resolved at 2026-06-04 19:16 UTC (4 h 2 min). Editing mobile apps and native iOS/Android use were unaffected; Retool reported implementing a fix. _(machine-written, sol)_
- Kind: Major incident · Label: outage (model (Jev))
- Changed: 2026-06-04 15:13 UTC · Detected: 2026-10-17 18:22 UTC
- [Source: https://stspg.io/86v89426frxb](https://stspg.io/86v89426frxb)
- [Company: Retool](https://rewindex.com/company/retool.md)
- Versions: before (none: first archived) → after incident\_version:204/d8msp2myxtgf@9f9edc53ef2b
- Change 1 of 1 for this incident

## What changed

**1. Added: Title**

```diff
+ Retool Mobile apps cannot be opened in the in-browser preview
```

**2. Added: Impact**

```diff
+ major
```

**3. Added: Status**

```diff
+ resolved
```

**4. Added: Start time**

```diff
+ 2026-06-04 15:13 UTC
```

**5. Added: Resolved time**

```diff
+ 2026-06-04 19:16 UTC
```

**6. Added: Affected components**

```diff
+ Classic web app, Web Application and APIs
```

**7. Added: Update** (investigating) · 2026-06-04 15:13 UTC

```diff
+ We are investigating reports that Retool Mobile apps fail to load when opened in a web browser (the in-browser "View"/user-mode preview and the editor preview button). Editing mobile apps and running them in the native iOS/Android Retool Mobile apps are unaffected.
```

**8. Added: Update** (identified) · 2026-06-04 15:45 UTC

```diff
+ The issue has been identified and a fix is being implemented.
```

**9. Added: Update** (monitoring) · 2026-06-04 16:39 UTC

```diff
+ A fix has been implemented and we are monitoring the results.
```

**10. Added: Update** (resolved) · 2026-06-04 19:16 UTC

```diff
+ This incident has been resolved.
```

## History of this incident

| When (UTC) | Change | Label |
| --- | --- | --- |
| 2026-06-04 15:13 UTC | Major incident: Retool Mobile apps cannot be opened in the in-browser preview (this change) | outage |

All Retool changes: [timeline](https://rewindex.com/company/retool/changes.md)
_Diff excerpts are shown on normalized text: dates, counters and tokens appear as ‹date›, ‹count›, ‹tok›; noise-only edits are hidden. Rewindex shows the changed passages, not a copy of the page._


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Canonical: https://rewindex.com/change/ib4655ef2a644bb · Markdown: https://rewindex.com/change/ib4655ef2a644bb.md · JSON: https://rewindex.com/api/v1/changes/ib4655ef2a644bb · Generated 2026-10-18T02:54:11.947Z