Regular Expressions 101

Please wait while the app is loading...

Regular Expressions 101

@regex101 Donate Sponsor Contact Bug Reports & Feedback Wiki What's new?

Order By

Filter by Flavor

Sponsors

All your environment variables, in one place

Library entries

Search library

3

C# Regex Extract/Match Nested HTML Elements/Tags

With this C# regex, you can easily match/Parse Nested HTML tags. Example input: someTitle ...

Submitted by w4po - a year ago

3

Match any layer bracket pair (.NET)

Match any layer bracket pair

Submitted by Yakumo Yukari - a year ago

2

Matching decimals in european format (dot as grouping separator, comma as decimal separator)

A regex for validating decimal numbers in the European number format (in many parts of Europe at least, including Germany). A comma is used as a separator for the decimal number, a dot as a separator for thousand places.

Submitted by Florian Drees - 2 years ago

2

Comparison of decimals with operators such as <, >, !=, ==, <>

Regex expression for comparing decimal numbers with the usual comparison operators such as (greater than), >= (greater than or equal to), != (not equal to), == (equal to), ... The regex also allows filtering of data from e.g. a database, whereby the first value is not needed, e.g. [FIELD] < 100

Submitted by Florian Drees - 2 years ago

2

Markdown Heading

Parses the text following a '#' and a space all the way up to the next return character. Additional #'s can be added for parsing of other type of headings!

Submitted by Hansen - a year ago

2

Extract URL parts only named capturing groups

Extract URL parts only named capturing groups

Submitted by dixanms - a year ago

2

Asciidoc PlantUML Block

Regex to select PlantUML Block in Asciidoc documents

Submitted by anonymous - a year ago

2

domain for Google Data Studio (re2 dialect)

Matches subdomain, domain and top level in a field that contains a urls. https://www.whatever.you.want ---> whatever.you.want

Submitted by anonymous - 6 years ago

2

Replace sub-strings in string

Replace sub-strings in string

Submitted by anonymous - 3 months ago

1

Mime type parser

A "simple" regex to parse mime types. Handles all commonly occurring parts of a mime type string such as: Type Subtype Subtype's with an extra extension (e.g. svg+xml) (Optional input) Multiple parameters (Optional input)...

Submitted by Vespion - a month ago

1

UNC Path Component Validation - Sharename

There are specific requirements for the different components of a UNC path. While it's possible to try and validate the entire UNC path in one go, you quite often end up needing to break the path down anyway unless simply handing it off to some other library (in which case they should be providing v...

Submitted by thejamesdecker - 3 months ago

1

Phone number for all countries

Phone number for all countries. Valid symbols: ( ), -, whitespace

Submitted by Alexander Smirnov - a month ago

1

Replace ^ with Math.pow function. Not made to work with braces.

Replaces ^ with Math.pow function call. This assumes all braces have been combined first. If you need help with the combination, I got you—try this Python algorithm: def evaluate_braces(expr): """Recursively evaluate expressions within braces""" Check if expression contains braces if '(' in...

Submitted by Glitchii - https://github.com/Glitchii - 4 days ago

1

Siebel Id

no description available

Submitted by anonymous - 6 years ago

1

Hostname validation

Validates subdomain, root domain, and wild card domains

Submitted by AnonymousDapper - 6 years ago

1

Domain validation regex suitable for user input

This regexp can be used to validate domain names in Golang. While it cannot enforce the 253 character limit (with optional trailing period not included) that can be easily done by a simple len(domain) <= 253 check as well. This can be used as-is in other languages, even with RE2 regex engine. If po...

Submitted by Alexander Dupuy - 3 years ago

1

Extract columns names from any select query

This regex can capture any column name from a select query. Be the original name, like are named on table, renamed with a reserved word AS or even without explicit AS. Go on, and test with your query ;)

Submitted by Jefferson Gouveia - 5 years ago

1

^(?:\d+[a-z]|[a-z])(?:\^\d+)(?:[\+|\-])(?:\d+[a-z])(?:[\+|\-])(?:\d+\=\d+)

for quadratic equations ||ax^2+bx+c=d||

Submitted by anonymous - 2 years ago

1

String doesn't start or end with . - '

String doesn't start or end with . - '

Submitted by VS - 2 years ago

1

Match all numbers

Match all numbers from a string.

Submitted by VS - 2 years ago

1 2 3 4...22