Hello, Tumblr friends! If you’ve recently changed your Tumblr URL or are planning to, please take a moment to read this.
You know how sometimes, when you click through a link on the Web, you get a 404 or other such error because whatever was on the other side isn’t there anymore? That’s called link rot, and it’s a real problem for the health of the Web; it’s particularly bad for Tumblr posts. As Tim Berners-Lee warned us back in 1998, cool URLs don’t change; if someone reblogs your post or shares a link to it, you want that link to still work in the future, even if you’ve changed the URL of your blog.
So what can you do? The right way to fix it would be with server-side redirects, but Tumblr doesn’t currently support those. Please complain loudly until they do. In the meantime, here’s an alternate solution; please use this if you’ve changed your URL.
Not that I’m changing my URL, but can you do this by having your old URL as a sideblog or do you need to make a new account?
Just by having your old account as a sideblog works fine.
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#Tumblr: a User’s Guide