Canonical Tag Generator
Canonical Tag Generator requires a URL accepted by the browser URL parser, removes only the fragment, serializes the result, escapes HTML-sensitive characters, and outputs one rel=canonical link. Query parameters remain, relative URLs without a base fail, and browser serialization can normalize details. The page does not decide which duplicate should be canonical, check redirects/status/indexability, or confirm consistency with sitemap and internal links.
Runs locally — files stay on your deviceAre query parameters removed from the canonical?
No. Only the fragment is removed.
Canonicalization is a sitewide consistency decision
The link is a signal identifying a preferred representative among duplicate or very similar URLs; engines can choose another URL when signals conflict.
How it works
new URL parses trimmed input, hash is cleared, toString serializes it, and the value enters a link template.
Key concepts
Self-reference is common
Indexable canonical pages often point to their own preferred URL.
Signals should agree
Redirects, sitemap, hreflang, and internal links should reinforce the choice.
When to use it
- Generate markup after choosing an authoritative absolute URL.
- Remove a meaningless fragment from a canonical candidate.
- Avoid hand-written quote escaping.
When not to use it
- Do not let the generator choose between duplicates.
- Do not assume parameters disappear.
- Do not canonicalize genuinely distinct content indiscriminately.
Worked examples
Fragment
- Input
https://example.com/page#top- Expected output
Canonical without #top
Fragments are client-side identifiers.
Tracking query
- Input
https://example.com/page?utm_source=x- Expected output
Query retained
No tracking cleanup runs.
Relative path
- Input
/page- Expected output
Error
No base URL is supplied.
Common mistakes
Keeping unwanted query parameters
The generator retains them. Correction: Choose/clean the canonical URL first.
Pointing all pages home
Distinct content loses appropriate signals. Correction: Canonicalize only equivalent content.
Conflicting signals
Sitemap and links can disagree. Correction: Align the sitewide implementation.
Best practices
- Use absolute HTTPS preferred URLs.
- Self-reference indexable canonical pages consistently.
- Audit redirects, status, indexability, hreflang, sitemap, and links.
Related operations and differences
HTML Link Extractor
Choose HTML Link Extractor when you need to extract href values from pasted HTML.; use Canonical Tag Generator specifically for canonical.
Internal Link Extractor
Choose Internal Link Extractor when you need to extract relative and same-host links.; use Canonical Tag Generator specifically for canonical.
Meta Tag Generator
Choose Meta Tag Generator when you need to generate title and description HTML tags.; use Canonical Tag Generator specifically for canonical.
Robots.txt Generator
Choose Robots.txt Generator when you need to generate a basic robots.txt file.; use Canonical Tag Generator specifically for canonical.
SERP Snippet Preview
Choose SERP Snippet Preview when you need to preview title, URL and description as text.; use Canonical Tag Generator specifically for canonical.
Sitemap XML Generator
Choose Sitemap XML Generator when you need to create a simple sitemap from a URL list.; use Canonical Tag Generator specifically for canonical.
Limitations and privacy
- Fragment removal and markup generation only.
- No query cleanup, duplicate analysis, fetching, redirect/status/indexability check, deployment, or signal-consistency audit.
The pasted text or URL is processed locally in this browser and is not fetched or submitted by the tool.
Frequently asked questions
Does it remove UTM parameters?
No.
Can I enter a relative URL?
No.
Is canonical a directive?
Search engines treat it as a strong signal, not an unconditional command.
Does it test the target?
No.