Random Text - Generate some random strings (such as passwords) using defined or your custom characters.

Textify - This lets you do some text modifications directly in your browser. You can do mutli-line find and replace, adjust case, and a few other things. This all happens in your browser using Javascript, nothing is sent to the server.

Userful tools on other websites:

IP/Subnet Calculator - This excellent calculator lets you find out what IP addresses a subnet of 255.255.255.248 include quickly.

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