Q . How to find non-ascii character in any text editor.

Brad Johnson. asked, Dec 22 ' 2017


I have a very long paragraph and are lots of non-ascii characters.
How can I easily found those characters in any of text editor with find command(dialog box).

  • find
  • non-keyboard-character
  • ascii
  • non-ascii-characters

2 Answers

Working on some code and when try to compile or run arrrrrr, got a non-ascii char error ?????
Now how to resolve this, here is the way if you are using notepad++ as a text editor.

1. Ctrl-F ( View -> Find )
2. put [^\x00-\x7F]+ in search box
3. Select search mode as 'Regular expression'
4. Click on Search!!

This will help you to track or replace all non-ascii charater in text file.

Using range in a [] character class in your search, you ought to be able to exclude the ASCII hexadecimal character range, therefore highlighting (assuming you have hlsearch enabled) all other characters lying outside the ASCII range:


This will do a negative match (via [^]) for characters between ASCII 0x00 and ASCII 0x7F (0-127), and appears to work in my simple test. For extended ASCII, of course, extend the range up to \xFF instead of \x7F using /[^\x00-\xFF].

You may also express it in decimal via \d:


If you need something more specific, like exclusion of non-printable characters, you will need to add those ranges into the character class [].

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