Regular Expressions 101

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An explanation of your regex will be automatically generated as you type.
Detailed match information will be displayed here automatically.
  • All Tokens
  • Common Tokens
  • General Tokens
  • Anchors
  • Meta Sequences
  • Quantifiers
  • Group Constructs
  • Character Classes
  • Flags/Modifiers
  • Substitution
  • A single character of: a, b or c
    [abc]
  • A character except: a, b or c
    [^abc]
  • A character in the range: a-z
    [a-z]
  • A character not in the range: a-z
    [^a-z]
  • A character in the range: a-z or A-Z
    [a-zA-Z]
  • Any single character
    .
  • Alternate - match either a or b
    a|b
  • Any whitespace character
    \s
  • Any non-whitespace character
    \S
  • Any digit
    \d
  • Any non-digit
    \D
  • Any word character
    \w
  • Any non-word character
    \W
  • Non-capturing group
    (?:...)
  • Capturing group
    (...)
  • Zero or one of a
    a?
  • Zero or more of a
    a*
  • One or more of a
    a+
  • Exactly 3 of a
    a{3}
  • 3 or more of a
    a{3,}
  • Between 3 and 6 of a
    a{3,6}
  • Start of string
    ^
  • End of string
    $
  • A word boundary
    \b
  • Non-word boundary
    \B

Regular Expression
No Match

r"
"
gm

Test String

Substitution

Processing...

Code Generator

Language

Generated Code

const regex = new RegExp('\\x1B(?:[@-Z\\\\-_]|\\[[0-?]*[ -/]*[@-~])', 'gm') const str = `drwxrwxr-x - sebi sebi  1 Jun 09:08 .git drwxrwxr-x - sebi sebi  6 Apr 11:13 .github .rw-rw-r-- 993 sebi sebi  6 Apr 11:13 .gitignore drwxrwxr-x - sebi sebi 21 Apr 14:54 .pytest_cache drwxrwxr-x - sebi sebi  7 Apr 17:34 .tox drwxrwxr-x - sebi sebi 21 Apr 14:24 .venv .rw-rw-r-- 1,0k sebi sebi  6 Apr 11:13 CITATION.cff drwxrwxr-x - sebi sebi  6 Apr 11:13 config drwxrwxr-x - sebi sebi  6 Apr 11:13 docs .rw-rw-r-- 35k sebi sebi  6 Apr 11:13 LICENSE drwxrwxr-x - sebi sebi  6 Apr 11:13 provisioning .rw-rw-r-- 9,1k sebi sebi  6 Apr 11:13 README.md .rw-rw-r-- 133 sebi sebi  6 Apr 11:13 requirements.txt .rwxrwxr-x 443 sebi sebi  6 Apr 11:13 run_sample_simulation .rw-rw-r-- 1,3k sebi sebi  6 Apr 11:13 setup.py drwxrwxr-x - sebi sebi  6 Apr 11:14 src drwxrwxr-x - sebi sebi  6 Apr 11:13 tools .rw-rw-r-- 526 sebi sebi  6 Apr 11:13 tox.ini .rw-rw-r-- 1,4k sebi sebi 19 Mai 09:54 windows_iso_and_openssh_update.path `; const subst = ``; // The substituted value will be contained in the result variable const result = str.replace(regex, subst); console.log('Substitution result: ', result);

Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for JavaScript, please visit: https://developer.mozilla.org/en/docs/Web/JavaScript/Guide/Regular_Expressions