Technical
A canonical tag vs a redirect
Use a redirect when only one version should exist and users should never see the other. Use a canonical when both URLs need to remain reachable — a filtered view, a print version, a product in two categories — but only one should be indexed.
Side by side
| Compared on | Canonical | Redirect |
|---|---|---|
| Both URLs remain usable | Yes | No |
| Strength of the signal | A hint — can be ignored | A directive |
| Signals consolidated | Usually | Yes |
| Right for filtered views | Yes | No |
| Right for a moved page | No | Yes |
When A canonical tag is the right choice
- Filtered and sorted category views
- A product reachable through several category paths
- Print or AMP variants that must stay live
- Syndicated content published elsewhere with permission
When a redirect is the right choice
- A page that has genuinely moved
- Two pages consolidated into one
- Protocol and hostname canonicalisation — HTTP to HTTPS, www to non-www
- A discontinued product with a direct replacement
The strength difference matters
A canonical is a hint. Google can and does ignore one it disagrees with, particularly when the two pages are not genuinely equivalent. A redirect is not optional for the browser, which makes it the stronger tool when you can use it.
The combination that causes confusion
A page that redirects and is also listed in the sitemap, or a canonical pointing at a URL that redirects somewhere else. Both send contradictory instructions, and both are common in sites that have been through a migration.
The verdict
Redirect when the old URL should disappear; canonical when it must stay usable. If both are technically possible, the redirect is the stronger signal and the simpler thing to reason about later.
If you want the full treatment
Technical SEO, in the order the problems actually block you covers this in about 4 minutes — free, ungated, written from client work.
Who wrote this comparison
Anas Bin Masud builds e-commerce sites and does technical SEO for businesses in the UK, Canada and Pakistan. Where a comparison involves something I sell, the page says so — and every comparison here has to name at least two situations where each side wins, because a comparison one option always wins is an advert with a table in it.