For transactional email
Consider SMTP2GO for website-generated messages, form notifications, account notices, and other outbound system email.
Explore SMTP2GOAvailableFree browser-local analysis
Canonical URL Checker
SiteTend Canonical
Find canonical conflicts and compare the declared preferred URL with the page URL.
Your input stays private.HTML and URLs are analyzed in your browser.
Add canonical evidence
Paste HTML or check one canonical URL against its page URL.
Review the canonical
Start with conflicts, then review strengths and recommendations.
Your analysis will appear here
Add canonical evidence and select Analyze canonical.
Help
Declare one preferred URL clearly
A canonical link identifies the preferred URL for duplicate or closely related pages. Use one valid absolute URL and keep its protocol, hostname, and path format aligned with the preferred public page.
Questions
SiteTend Canonical FAQ
What does SiteTend Canonical check?
It checks for missing, empty, invalid, relative, multiple, or conflicting canonical declarations and compares protocol, www preference, trailing slashes, and self-reference when a page URL is supplied.
Does a canonical always need to point to the same page?
No. A canonical can intentionally point to a preferred equivalent page, but that decision should be confirmed because it consolidates signals away from the current URL.
Does the checker fetch the live page?
No. This version analyzes pasted HTML or URLs and does not inspect HTTP headers, redirects, or live page content.
Does SiteTend store pasted URLs or HTML?
No. Analysis runs in your browser, and pasted values are excluded from analytics.
Apply the result
From finding to verified fix
Interpret the finding
A single valid canonical is a consistency signal. Confirm that its destination is the page you actually want indexed.
Common causes to inspect
- CMS templates outputting more than one tag
- HTTP, www, or trailing-slash variants
- Copied staging or pagination markup
Practical next steps
- Choose the preferred public URL
- Align internal links and redirects
- Recheck the rendered page and indexable sitemap
What this check cannot prove
Pasted markup cannot confirm server headers, redirect chains, indexation, or whether Google accepts the declaration.
Recommended resources
Useful next steps for operating a website
For measuring business inquiries
Use WhatConverts to measure which marketing sources produce calls, forms, and leads. It measures outcomes; it does not fix technical website issues.
Explore WhatConvertsFor personal-data privacy
Consider Optery if exposed personal information or data-broker listings are a concern. It is a separate privacy resource, not an SEO or website-security scanner.
Explore OpterySiteTend may earn a commission if you purchase through these links, at no additional cost to you. These services are optional and separate from SiteTend's free checks.