# Canonical Tag & Duplicate Content Inspector

> Generate and validate rel="canonical" link tags to prevent duplicate content indexing penalties.

- **Category / Silo**: seo
- **Free Access**: Yes (No credit card required)

## Tool Description
Generate and validate rel="canonical" link tags to prevent duplicate content indexing penalties.

## Key Steps & Implementation
1. **Enter Preferred URL**: Input canonical HTTPS target URL.
2. **Configure Attributes**: Toggle self-referencing or cross-domain canonicals.
3. **Copy HTML Code**: Copy <link rel="canonical" href="..." /> tag.

## Key Benefits
- Self-Referencing Validation
- Trailing Slash Consistency Check
- Clean HTML Code
- Free Usage

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URL: https://cacto.cc/tools/seo/canonical-url-checker