What is the regex for non-ascii characters?

The regex pattern for non-ascii characters is `[^\x00-\x7F]`. This pattern validates detects any non-ascii character in text.

How do I use this regex in JavaScript?

In JavaScript, create the regex with `const regex = /[^\x00-\x7F]/;` and test with `regex.test(yourValue)`. It returns `true` if the value matches.

How do I use this regex in Python?

In Python, use `import re; re.match(r'[^\x00-\x7F]', value)`. The raw string prefix (`r`) prevents Python from interpreting backslashes as escape characters.

Is this regex case-sensitive?

By default, yes. To make it case-insensitive, add the `i` flag in JavaScript (`/[^\x00-\x7F]/i`) or use `re.IGNORECASE` in Python.

Regex for Non-ASCII Characters

Regex Pattern

[^\x00-\x7F]

Detects any non-ASCII character in text

Quick Answer

The regex pattern for non-ascii characters is `[^\x00-\x7F]`. Detects any non-ASCII character in text. This works in JavaScript, Python, Ruby, PHP, Java, and most regex engines that support PCRE syntax.

Test Examples

Input	Result
Café	✓ Matches
üöä	✓ Matches
你好	✓ Matches
naïve	✓ Matches
Hello World	✗ No match
ASCII only	✗ No match
123	✗ No match

Code Examples

javascript

const regex = /[^\x00-\x7F]/;
const isValid = regex.test(value);

python

import re
pattern = r'[^\x00-\x7F]'
if re.match(pattern, value):
    print("valid")

ruby

pattern = /[^\x00-\x7F]/
if value =~ pattern
  puts "valid"
end

php

if (preg_match('/[^\x00-\x7F]/', $value)) {
    echo "valid";
}

java

String pattern = "[^\\x00-\\x7F]";
boolean isValid = value.matches(pattern);

Frequently Asked Questions

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