Free program to scan a directory of text files and replace certain strings

Question

I need a free program that can scan all .xml files in a directory and replace a certain string occurrence.

Answer 1

Assuming you use Windows, Windows Grep can do this! It's free.

Replacing as well as searching: Once you have performed a search you can change the matches found to another string in all files or a single file, quickly, easily and safely. In beginner mode, the Replace Assistant gently guides you through the process.

Answer 2

Use sed:

find /dir -type f -exec sed -i 's/old/NEW/g' {} \;