dauntexlabs

Regex Tester

Test regular expressions with live match highlighting and capture groups.

Runs on your deviceFreeNo sign-up
Runs in your browser
Loading tool…

Designed to run in your browser. See the privacy policy.

More in Utilities

Utilities

List Utilities

Union, intersection, flatten, dedupe, sort and filter lists — line by line.

Utilities

String Utilities

Match, transform, run regex and analyse strings in a single pass.

Utilities

Case Converter

Switch between camelCase, snake_case, PascalCase, kebab-case and more.

Utilities

Cron Expression Explainer

Translate a cron expression into plain English and preview upcoming run times.

Utilities

CIDR / Subnet Calculator

Compute network, broadcast, netmask and host range from an IPv4 CIDR block.

Utilities

Chmod Calculator

Convert Unix file permissions between symbolic (rwx) and octal notation.