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

/
/
gm

Test String

Substitution

Processing...

Code Generator

Generated Code

# If you'd like to omit non-matching lines from the result; add ';d' to the end of the expression. sed -E 's/^(([.#]?[\w:>]+,?\s*)+){/#prefix $1{/gm;t' <<< ".rn_CircleImage { float: right; color: white; margin-right: 4vw; border: 1px solid black; background: black; border-radius: 50%; /* padding-bottom: 20%; */ width: 280px; height: 280px; margin-top: -260px; text-align: center; vertical-align: middle; position: relative; margin-bottom: 4%; -moz-border-radius: 50%; -webkit-border-radius: 50%; } .rn_Hero .rn_HeroInner { background-image: url(\"/euf/assets/themes/standard/images/CS11572.jpg\") !important; } .rn_CircleImage .textContainer { height: 200px; } .dot, .period { cursor: pointer; height: 10px; width: 10px; background-color: #717171; border-radius: 50%; display: inline-block; position: relative; transition: background-color 0.6s ease; bottom: -35px; } .active, .dot:hover { background-color: #ffffff; } .rn_CircleImage>li>a { color: #FFFFFF; } .urltext a { color: #FFFFFF; line-height: 24px; font-family: \"CS-Type-EP\", \"Helvetica Neue\", Helvetica, Arial, sans-serif; } .top { font-size: 1em; font-family: \"CS-Type-EP\", \"Helvetica Neue\", Helvetica, Arial, sans-serif; line-height: 24px; } .bottom { font-size: 1em; font-family: \"CS-Type-EP\", \"Helvetica Neue\", Helvetica, Arial, sans-serif; line-height: 24px; margin-bottom: 6px; } .main { font-size: 1.87em; font-family: \"CreditSuisseHeadlineWebRegular\", \"Helvetica Neue\", Helvetica, Arial, sans-serif; line-height: 34px; } .slide>li { width: 100%; } ul.slide { width: auto !important; padding-left: 10%; padding-right: 10%; } .slide>li:after { content: \"\"; display: inline; width: 50%; height: 0; padding-bottom: 50%; background: #4679BD; -moz-border-radius: 50%; -webkit-border-radius: 50%; border-radius: 50%; } .urltext a { color: #FFFFFF; line-height: 30px; font-family: \"CS-Type-EP\", \"Helvetica Neue\", Helvetica, Arial, sans-serif; background: transparent url(/euf/assets/themes/standard/images/icons/arrow-right-white.svg) no-repeat right center; padding-right: 1.7em; background-size: 1em; position: absolute; transition: background-color 0.6s ease; bottom: 18%; right: 28%; }"

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 SED, please visit: https://www.gnu.org/software/sed/manual/html_node/The-_0022s_0022-Command.html