URL: /rules/mobile/viewport-zoom

---
title: "Viewport Zoom"
description: "Checks that viewport doesn't disable user zoom"
---

Checks that viewport doesn't disable user zoom

| | |
|---|---|
| **Rule ID** | `mobile/viewport-zoom` |
| **Category** | [Mobile](/rules/mobile) |
| **Scope** | Per-page |
| **Severity** | error |
| **Weight** | 7/10 |

## Solution

Never disable user zoom with maximum-scale=1, user-scalable=no, or user-scalable=0. Users with visual impairments need to zoom. This is an accessibility violation (WCAG 1.4.4). It also harms usability for all users. Remove these properties from your viewport meta tag.

## Enable / Disable

### Disable this rule

```toml squirrel.toml
[rules]
disable = ["mobile/viewport-zoom"]
```

### Disable all Mobile rules

```toml squirrel.toml
[rules]
disable = ["mobile/*"]
```

### Enable only this rule

```toml squirrel.toml
[rules]
enable = ["mobile/viewport-zoom"]
disable = ["*"]
```