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Technical information

Main page title:

regex101: build, test, and debug regex

Main page description:

Regular expression tester with syntax highlighting, explanation, cheat sheet for PHP/PCRE, Python, GO, JavaScript, Java, C#/.NET, Rust.

Main page keywords:

regex,regex tester,regular expression,debugger,pcre,php,golang,java,javascript,python,.net,c#,rust

Protocol:

https

Status code:

200

Page size:

57.2 KB

Response time:

0.131sec.

IP:

78.47.220.195

Response headers:

server:	nginx
date:	Tue, 01 Oct 2024 04:21:51 GMT
content-type:	text/html; charset=utf-8
content-length:	58565
connection:	close
vary:	Accept-Encoding
etag:	W/"e4c5-x2RJhPZA7V45NMkOBp+mCqlTRxE"
x-frame-options:	SAMEORIGIN
x-xss-protection:	1; mode=block
x-content-type-options:	nosniff
referrer-policy:	no-referrer-when-downgrade
content-security-policy:	default-src 'self' 'unsafe-eval' http: https: data: blob: 'unsafe-inline'
strict-transport-security:	max-age=31536000; includeSubDomains; preload
service-worker-allowed:	/
cross-origin-opener-policy:	same-origin
cross-origin-embedder-policy:	credentialless

SEO headers

h1 Regular Expressions 101

h2 Save & Share

h2 Flavor

h2 Function

h2 Tools

h2 Explanation

h2 Match Information

h2 Quick Reference

h2 Regular ExpressionNo Match

h2 Test String

How to solve problems with regex101.com

Errors on the regex101.com website can be either on the server side or on your side (client side). If there is practically nothing to be done about errors on the server side (it remains only to wait for the site to work again), then with errors on the client side it is possible to solve the problem with the availability of regex101.com on your own.