Skip to content
Treasure Tools

Regex Validator

Validate and test regular expressions online with pattern analysis and match highlighting. Free regex validator with flag options.

Developer Tools
Instant results
Highlighted Matches (2)
Contact us at hello@example.com or support@test.org for more information.
Match Details
#1hello@example.comindex: 14
#2support@test.orgindex: 35

How to Use Regex Validator

1

Open Regex Validator

Navigate to Regex Validator in your browser — no installation or sign-up required.

2

Enter your data

Type, paste, or upload the content you want to process into the input area.

3

Configure options

Adjust any available settings to customize the output to your needs.

4

Get your result

The result appears instantly. Copy it to your clipboard or download it as a file.

Frequently Asked Questions

Regex Validator is a free online developer utilities tool. Validate and test regular expressions online with pattern analysis and match highlighting. Free regex validator with flag options.

Related Tools

Regex Tester

Test and debug regular expressions online with real-time matching and group highlighting. Free regex tester for JavaScript and Python.

MIME Type Lookup

Look up MIME types by file extension or search MIME types to find associated extensions. Free MIME type reference with 200+ common types.

HTTP Status Code Reference

Searchable HTTP status code reference with descriptions, use cases, and examples. Find any HTTP response code from 1xx to 5xx instantly.

.env File Validator

Validate .env file format, detect duplicate keys, missing values, and syntax issues. Free online dotenv file checker and linter.

AI Regex Generator

Generate regular expressions from plain English descriptions using AI. Free online regex generator that creates patterns from text.

HTML to JSX

Convert HTML to React JSX online instantly. Free HTML to JSX converter that transforms class to className and fixes attributes.