If I want my website to be crawled, do I need an "empty" disallow?

Is there any difference between

User-agent: *
Disallow: /folder/


User-agent: *
Disallow: /folder/

I have seen a robots.txt where the first option is used but I don´t understand why.

  • Your second example is correct providing you only intend to block /folder/.
    – closetnoc
    Mar 29 '17 at 18:19

An empty disallow matches nothing and is ignored. The second example is what you're looking for.

To allow all robots complete access

User-agent: *

(or just create an empty "/robots.txt" file, or don't use one at all)


  • It looks like he wants to allow all crawling except one specific folder Mar 29 '17 at 19:45
  • @Stephen This is true. That is why the second example works. The first two lines "allow all robots complete access" as shown in the quote.
    – grg
    Mar 29 '17 at 19:46
  • Got it. I thought you were trying to repeat his second option in the quote. Mar 29 '17 at 19:53

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