URL: /rules/url/lowercase

---
title: "URL Lowercase"
description: "Checks that URLs are lowercase"
---

Checks that URLs are lowercase

| | |
|---|---|
| **Rule ID** | `url/lowercase` |
| **Category** | [URL Structure](/rules/url) |
| **Scope** | Per-page |
| **Severity** | warning |
| **Weight** | 4/10 |

## Solution

URLs should be lowercase to prevent duplicate content issues. Most servers treat /Page and /page as different URLs, creating duplicates. Always use lowercase URLs and redirect uppercase variants. Configure your server or CMS to auto-lowercase URLs. This also improves URL consistency and readability.

## Enable / Disable

### Disable this rule

```toml squirrel.toml
[rules]
disable = ["url/lowercase"]
```

### Disable all URL Structure rules

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

### Enable only this rule

```toml squirrel.toml
[rules]
enable = ["url/lowercase"]
disable = ["*"]
```