How to search for a word in all my notes and automatically convert it into a tag?

Help
2

Some alternatives:

  1. Install Global search and replace, search for word and replace it with word.

  2. Here’s a discussion about other methods:
    Global (Mass / Vault-wise) search & replace - #14 by silkyteabags

  3. Here’s a script foldertag

  4. Also last but no least you can use quick tagger plugin, to search word, right click on results and add tag #word. It would not replace the word, but is an alternative.