Canonical Tag Checker
Validate rel=canonical links, self-referencing consistency, protocol match, and duplicate prevention.
How It Works
Verify whether canonical tags are absolute, self-referential or pointing to master variants, matching HTTPS protocol, and free of invalid relative paths or contradictory directives.
Privacy & Processing
Runs locally in your browser for pasted HTML · Server fetch optional for live URLs. Unlike ad-supported directories, there are no third-party trackers, promotional popups, or artificial download delays.
Frequently Asked Questions
How does Canonical Tag Checker process my data?
This utility executes 100% locally in your browser memory via client-side JavaScript and WebAssembly. No files, calculations, or raw inputs are uploaded to external servers.
Are there usage limits or account registration required?
No account or paid subscription is required. All production tools are accessible directly with zero mandatory registration or artificial delays.
Does Canonical Tag Checker produce official scoring or ranking guarantees?
Diagnostic and analytical tools provide objective technical measurements and recommendations based on documented web standards. Diagnostic scores do not predict search engine rankings or guarantee business outcomes.
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