Are links with space considered to be the same as links with %20?

[lucek]

I wonder if Google would consider those three links to be the same?

• http://www.example.com/test page.html
• http://www.example.com/test page.html
• http://www.example.com/test+page.html

[johncallaghan]

Google would consider the above URL's to be three different pages.

[KarlBantleman]

You can't have URL's with spaces in so Google would see them as 2 different URL's. If you have a space Google sees it as %20. I would avoid having this as your URL structure, try using test-page or test_page.

[irvingw]

http://www.example.com/test page.html will be converted to %20 so it could be interpreted as the same page

All three could be considered spaces, I wouldn't use any of them.

http://blogs.iis.net/robert_mcmurray/archive/2011/04/27/bad-characters-to-use-in-web-based-filenames.aspx

[lucek]

From what I've seen and tested Google will consider %20 to be the same as space character. Moreover it will convert spaces in URL to %20 in SERP.

According to RFCs URL should not contain spaces or any other characters that may be incorrectly interpreted (for example <.> but there are others). Such characters should be represented as '%' followed by hex code of the character (20 in case of space).