Side by side

Regex Shuttle vs The Regex Coach

Both stand on regular expression testers. Which one you can start free with, which one lets you read the code, and what each costs once you pay.

Regex Shuttle

Free plan Web

Regex Shuttle combines a tester, explainer, pattern library, substitution preview, and cheat sheet in a free browser tool. Its regex behavior follows JavaScript’s engine, so it is suited to JavaScript patterns rather than other regex flavors.

Visit Regex Shuttle

The Regex Coach

Free plan LinuxWindows

The Regex Coach offers interactive inspection and explanation for Perl-compatible patterns at no charge. Its aging Windows release, unsupported Linux option and stated limitations matter for users needing ongoing support or reliability with longer patterns.

Visit The Regex Coach

The facts

	Regex Shuttle	The Regex Coach
Free plan	Yes	Yes
Open source	Not published	Not published
Runs on	Web	Linux, Windows
Lowest paid plan	Free or on request	Free or on request
Plans published	1	1
Maker	Not published	Not published
Website	regex.shuttlelab.org	weitz.de
On regular expression testers	#11 of 23	#15 of 23

Regex Shuttle: what it does well

Highlights matches as you type.
Explains expressions token by token.
Previews substitutions including capture-group references.
Processes patterns locally in the browser.
Works offline after the first load.

What to know first

Uses JavaScript’s native RegExp engine.
Offline use starts only after the first load.

The Regex Coach: what it does well

Shows matches as patterns and target text change.
Highlights captured groups and selected pattern parts.
Explains patterns and displays parse trees.
Steps through matching and simulates split and substitution.

What to know first

No Mac version is available or planned.
Linux release is unsupported and no longer maintained.
Maker provides no warranty or promised older-system support.
Long regular expressions may cause stack overflow.

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