Vaild: valid.email@example.com john.doe123@example.co.uk alice_smith@company.org user1234@emailprovider.net...

This reges do not covering long emails. It should check domian (64) and page name(255) limits.

brazilian car licence registry validation (validação de placa de carro brasileira e mercosul)

Full name validation with latin caracters

m3u8-ffzy

Allows to extract or check if the text includes different URLs, allowing for you to check different kinds of links from the simple ones up to the more complex ones that includes prefix, subdomain, domain, entire website name and subpages.

This matches morse code input and leaves word break spaces

Initializing identifiers

Validates protocol, sub-domain, domain, and top-level domain. No port number and query string parameters validation is made.

A simple regex to match API keys for OpenWeather map. Matches 32 hexadecimal character strings.

A regex to match against Roblox cookies. Two captures; the first is the warning text; the second is the cookie itself.

JS/TS regex for token validation.

convert 16 chars into four hyphen separated groups

English address that can start with numbers, # sign or words (\w) followed with any combination of previously mentioned. Multi-line, global and case insensitive supported. Address CANNOT START WITH \w character _ or 0 or any other symbols

Example: Received: from VI1PR0102CA0029.eurprd01.prod.exchangelabs.com (2603:10a6:802::42) by VE1PR01MB5599.eurprd01.prod.exchangelabs.com (2603:10a6:803:11f::30) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.2602.12; Thu, 9 Jan ...

indonesian telephone number

.Net regular expression for resolving placeholders in the format of ${rewriter(multilevel:key)?fallback} (+ variations)

Validate and split street address (street and house number) with leading house number

Validate and split street address (street and house number) with trailing house number

Validate unicode email addresses