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Reference

Regex Cheat Sheet

Regex Cheat Sheet is a free online reference that helps you interactive regex reference; anchors, quantifiers, groups, character classes, lookaround, and flags with examples. Regex Cheat Sheet uses 1 input field, returns 1 output value, and runs in your browser on the device.

Key facts

Inputs
1 field: Category
Outputs
1 value: Reference
Runtime
your browser on the device
Mode
Reference
Privacy
Files and text stay in the browser session.
Cost
$0, no account required

How to use Regex Cheat Sheet

  1. 1

    Paste or fill in the input

    Enter your text or values into the input fields on the page.

  2. 2

    Run the utility

    Click Compute to run the utility in your browser and review the result.

  3. 3

    Copy the output

    Copy the output value you need from the result panel.

Regex Cheat Sheet details

First, enter Category in Regex Cheat Sheet. Next, review Reference. Additionally, Regex Cheat Sheet uses 1 input field and 1 output block so the result is easy to scan and copy.

Pick a category and get a detailed reference for that part of regular expression syntax. Each section includes the syntax, what it does, practical examples, and common gotchas. Covers all major regex features across JavaScript, Python, and PCRE engines.

Common searches

  • regex cheat sheet
  • regular expression reference
  • regex syntax
  • regex quantifiers
  • regex anchors
  • regex lookahead

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Frequently asked

What is Regex Cheat Sheet?

Regex Cheat Sheet is a free online reference that helps you interactive regex reference; anchors, quantifiers, groups, character classes, lookaround, and flags with examples. Regex Cheat Sheet uses 1 input field, returns 1 output value, and runs in your browser on the device.

What inputs and outputs does Regex Cheat Sheet use?

Regex Cheat Sheet uses 1 input field: Category. Regex Cheat Sheet returns 1 output value: Reference.

Do my files and data stay private?

Yes. Regex Cheat Sheet runs entirely in your browser using your device's CPU. Files and text are never uploaded to our servers, so your data stays private.

How do I use Regex Cheat Sheet?

Open Regex Cheat Sheet, paste or fill in the input fields, and the result updates instantly. Regex Cheat Sheet runs in your browser with no upload and no waiting.

Which browsers does Regex Cheat Sheet support?

Any modern browser works in Chrome, Firefox, Safari, and Edge on desktop and mobile. Regex Cheat Sheet uses standard web APIs and does not require any plugin, extension, or sign-up.