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#7979 – sh404 -> 4seo

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Friday, 02 July 2021 10:48 UTC


We are running on many websites also on big ones sh404. How is it possible to change from sh404 to 4seo without loosing all the sefURLs? Is there a migration process or a tutorial?

Friday, 02 July 2021 15:28 UTC


There's no migration from sh404SEF to 4SEO because 4SEO is not a replacement for sh404SEF. 4SEO does not, and won't, deal with SEF URLs. It's an SEO extension and only that.

Here is the global picture:

- sh404SEF does SEF URLs, 4SEO does nothing with URL construction and management (it has redirections and canonical,  a lot)

- It means you can use 4SEO with sh404SEF for SEF URLs, but also with JoomSEF or another SEF extension, or directly with Joomla SEF URLs.

- sh404SEF has few SEO features, 4SEO is only SEO

- you can use both together on Joomla 3

- 4SEO runs on Joomla 3 and 4

- sh404SEF will only run on Joomla 3

- when Joomla 4 is stable, we will have a small Joomla 3&4 extension, called 4SEF, that will take over the URL management part of sh404SEF, and provide a transparent migration from Joomla 3 to Joomla 4 for SEF URLs and custom meta data.

So there's a bit of overlap, but 4SEO is SEO for 2021. It does away with most of the extra baggage accumulated by sh404SEF but adds SEO features lacking in sh404SEF, those that matters today:

- structured data generation

- core web vitals measurement

- sitemap with only relevant URLs

- broken links identification

- redirection engine, canonical rules

- content replacement (auto linking for instance)

- several other tools needed for SEO (analytics snippets, custom code insertion, put some pages offline or 404)

- work on the frontend

and of course 4SEO has a much better user interface.

In addition, I'd like to mention that sh404SEF will be supported (on Joomla 3) for as long as Joomla 3 is relevant. Joomla 3 will be supported by the Joomla project officially for 2 years after Joomla 4 is released, but I know people will keep using it for more than that so I will support sh404SEF at least another year after that, and maybe more depending on demand.

Best regards

Yannick Gaultier / @weeblr


Friday, 02 July 2021 15:32 UTC

ok thanks, all understood. So I am very looking forward to 4SEF because sh404 makes very big websites slow down.
Will buy then both extensions and use them. 4seo looks great!

Friday, 02 July 2021 16:07 UTC


Thanks for that. Yes, when using sh404SEF on large sites, caching is a must. It's actually not so much the size of the site but basically how many links you have on a page. If you have, say 200 links on a page, that's some work to read them. That's when page caching can help a lot.

That said, whether you want to work both is up to you. What you won't  get with 4SEO is the ability to customize URLs. All canonical and redirection work is done the same in 4SEO. So it really depends on how you use sh404SEF right now.

Best regards

Yannick Gaultier / @weeblr


Monday, 02 August 2021 05:34 UTC
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