Here is direct URL to the tool https://technicalseo.com/tools/robots-txt/ I've tried it and it seems to work pretty well.

Where is the deadlink you are referring to as I don't see this pr removing anything. At a guess you are referring to a link already removed a very long time ago

On my version of Joomla I downloaded and Installed v6.0.2 (2026-02-08); it had following robots txt; the link http://tool.motoricerca.info/robots-checker.phtml is dead

# If the Joomla site is installed within a folder such as at
# e.g. www.example.com/joomla/ the robots.txt file MUST be
# moved to the site root at e.g. www.example.com/robots.txt
# AND the joomla folder name MUST be prefixed to the disallowed# path, e.g. the Disallow rule for the /administrator/ folder
# MUST be changed to read Disallow: /joomla/administrator/
#
# For more information about the robots.txt standard, see:
# http://www.robotstxt.org/orig.html
#
# For syntax checking, see:
# http://tool.motoricerca.info/robots-checker.phtml

User-agent: *
Disallow: /administrator/
Disallow: /bin/
Disallow: /cache/
Disallow: /cli/
Disallow: /components/
Disallow: /includes/
Disallow: /installation/
Disallow: /language/
Disallow: /layouts/
Disallow: /libraries/
Disallow: /logs/
Disallow: /modules/
Disallow: /plugins/
Disallow: /tmp/

I see in the new version of Joomla v6.0.3; the link was removed, and nothing was put in its place.

# If the Joomla site is installed within a folder
# eg www.example.com/joomla/ then the robots.txt file
# MUST be moved to the site root
# eg www.example.com/robots.txt
# AND the joomla folder name MUST be prefixed to all of the
# paths.
# eg the Disallow rule for the /administrator/ folder MUST
# be changed to read
# Disallow: /joomla/administrator/
#
# For more information about the robots.txt standard, see:
# https://www.robotstxt.org/orig.html

User-agent: *
Disallow: /administrator/
Disallow: /api/
Disallow: /bin/
Disallow: /cache/
Disallow: /cli/
Disallow: /components/
Disallow: /includes/
Disallow: /installation/
Disallow: /language/
Disallow: /layouts/
Disallow: /libraries/
Disallow: /logs/
Disallow: /modules/
Disallow: /plugins/
Disallow: /tmp/

My pull is just suggestion for a replacement checker URL

On my version of Joomla I downloaded and Installed v6.2.0 (2026-02-08); it had following robots txt; the link http://tool.motoricerca.info/robots-checker.phtml is dead

# If the Joomla site is installed within a folder such as at
# e.g. www.example.com/joomla/ the robots.txt file MUST be
# moved to the site root at e.g. www.example.com/robots.txt
# AND the joomla folder name MUST be prefixed to the disallowed# path, e.g. the Disallow rule for the /administrator/ folder
# MUST be changed to read Disallow: /joomla/administrator/
#
# For more information about the robots.txt standard, see:
# http://www.robotstxt.org/orig.html
#
# For syntax checking, see:
# http://tool.motoricerca.info/robots-checker.phtml

```
User-agent: *
Disallow: /administrator/
Disallow: /bin/
Disallow: /cache/
Disallow: /cli/
Disallow: /components/
Disallow: /includes/
Disallow: /installation/
Disallow: /language/
Disallow: /layouts/
Disallow: /libraries/
Disallow: /logs/
Disallow: /modules/
Disallow: /plugins/
Disallow: /tmp/

I see in the new version of Joomla v6.3.0; the link was removed, and nothing was put in its place.`

# If the Joomla site is installed within a folder
# eg www.example.com/joomla/ then the robots.txt file
# MUST be moved to the site root
# eg www.example.com/robots.txt
# AND the joomla folder name MUST be prefixed to all of the
# paths.
# eg the Disallow rule for the /administrator/ folder MUST
# be changed to read
# Disallow: /joomla/administrator/
#
# For more information about the robots.txt standard, see:
# https://www.robotstxt.org/orig.html

```
User-agent: *
Disallow: /administrator/
Disallow: /api/
Disallow: /bin/
Disallow: /cache/
Disallow: /cli/
Disallow: /components/
Disallow: /includes/
Disallow: /installation/
Disallow: /language/
Disallow: /layouts/
Disallow: /libraries/
Disallow: /logs/
Disallow: /modules/
Disallow: /plugins/
Disallow: /tmp/

```

@killrawr Could there be some typos on the Joomla version numbers above? 

You mention Joomla 6.3.0 but 6.2 isn't even out yet?

`On my version of Joomla I downloaded and Installed v6.2.0 (2026-02-08); it had following robots txt; the link http://tool.motoricerca.info/robots-checker.phtml is dead

If the Joomla site is installed within a folder such as at

e.g. www.example.com/joomla/ the robots.txt file MUST be

moved to the site root at e.g. www.example.com/robots.txt

AND the joomla folder name MUST be prefixed to the disallowed# path, e.g. the Disallow rule for the /administrator/ folder

MUST be changed to read Disallow: /joomla/administrator/

For more information about the robots.txt standard, see:

http://www.robotstxt.org/orig.html

For syntax checking, see:

http://tool.motoricerca.info/robots-checker.phtml

User-agent: * Disallow: /administrator/ Disallow: /bin/ Disallow: /cache/ Disallow: /cli/ Disallow: /components/ Disallow: /includes/ Disallow: /installation/ Disallow: /language/ Disallow: /layouts/ Disallow: /libraries/ Disallow: /logs/ Disallow: /modules/ Disallow: /plugins/ Disallow: /tmp/

I see in the new version of Joomla v6.3.0; the link was removed, and nothing was put in its place.`

If the Joomla site is installed within a folder

eg www.example.com/joomla/ then the robots.txt file

MUST be moved to the site root

eg www.example.com/robots.txt

AND the joomla folder name MUST be prefixed to all of the

paths.

eg the Disallow rule for the /administrator/ folder MUST

be changed to read

Disallow: /joomla/administrator/

For more information about the robots.txt standard, see:

https://www.robotstxt.org/orig.html

User-agent: * Disallow: /administrator/ Disallow: /api/ Disallow: /bin/ Disallow: /cache/ Disallow: /cli/ Disallow: /components/ Disallow: /includes/ Disallow: /installation/ Disallow: /language/ Disallow: /layouts/ Disallow: /libraries/ Disallow: /logs/ Disallow: /modules/ Disallow: /plugins/ Disallow: /tmp/ `

@killrawr Could there be some typos on the Joomla version numbers above?

You mention Joomla 6.3.0 but 6.2 isn't even out yet?

Correct I meant 6.0.2 and 6.0.3

That link was removed from Joomla in 2020 with Joomla 3.9.23 #31327

Ohhhh I migrated from joomla 3 to joomla 6 and my robots hadn't changed

I dont see any need to add this checker and no guarantee that it won't disappear in the future. There are many options available and despite your statement there is nothing about this checker that is open source that I could find.