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Browse common JavaScript regex tokens, group types, flags, and examples without leaving the browser.
What this tool helps you answer
Filter a JavaScript regex reference by topic or search term so you can recall tokens, meanings, and examples quickly.
Next step
Use this page when you remember roughly what regex feature you need but want a fast JavaScript-focused reference before you write or debug the pattern.
Editorial review
This page combines the live tool, input guidance, worked examples, and operating limits so Regex Cheat Sheet stays useful even before users interact with the calculator.
Reviewed by Klartext Tools against the current Regex Cheat Sheet workflow on 2026-03-12.
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Use with judgment
Page scope
Jump directly to the lookaround section when you remember the idea but not the exact token.
Filters the table to the positive and negative lookbehind entries.
Show the JavaScript flag entries only when you need a quick refresher on g, i, m, s, or u.
Displays the flag reference rows with examples.
Use the cheat sheet when you need a quick JavaScript regex reference instead of a full tutorial.
Narrow the table to the concept area you need, or keep everything visible for a broad reference.
The filter checks token, meaning, and example text so partial memory is usually enough.
Do not rely on the token alone. The example usually makes the syntax choice much clearer.
Once the syntax is clear, validate the full regex on sample input or inspect a more complex pattern in the explain view.
These shortcuts jump straight to common reference lookups.
Jump directly to the lookaround section when you remember the idea but not the exact token.
Sample inputs
Sample outcome: Filters the table to the positive and negative lookbehind entries.
Show the JavaScript flag entries only when you need a quick refresher on g, i, m, s, or u.
Sample inputs
Sample outcome: Displays the flag reference rows with examples.
A cheat sheet is only useful if it maps tokens to meaning quickly. This page keeps the focus on JavaScript regex syntax so you can move from memory refresh to working pattern without paging through generic docs.
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