Regex Cheatsheet

Quick regex syntax cheatsheet for developers.

Anchors

PatternMeaning
^Start of string
$End of string
\bWord boundary

Quantifiers

PatternMeaning
*0 or more
+1 or more
?0 or 1
{n}Exactly n
{n,}n or more
{n,m}Between n and m

Character classes

PatternMeaning
.Any char (except newline)
\dDigit [0-9]
\DNon-digit
\wWord [a-zA-Z0-9_]
\sWhitespace
[abc]Any of a,b,c
[^abc]Not a,b,c
[a-z]Range a to z

Groups

PatternMeaning
(x)Capturing group
(?:x)Non-capturing
(?<name>x)Named group
|Alternation (or)

Escapes

PatternMeaning
\nNewline
\tTab
\\Backslash
\.Literal .

Flags

PatternMeaning
gGlobal
iCase insensitive
mMultiline
sDotall

Introduction

Regex Cheatsheet is a free, fast tool designed to help you solve "regex cheatsheet" needs without leaving your browser. The goal is consistency: predictable structure, clean formatting, and minimal steps from input to result. Once you have a draft, review it carefully and refine it based on your actual setup and obligations. Developer utilities provide quick lookups and checks that replace tab-hopping through documentation.

Explore more in Tools, All Tools, or the Developer Utilities category.

How to use

  • Open Regex Cheatsheet on this page.
  • Enter your input values.
  • Click generate (or run the action).
  • Copy or download the result.

Features

  • Fast Regex Cheatsheet results in your browser
  • Clear output you can copy into code or docs
  • Designed as a practical free developer tool
  • Works well alongside other DevToolDock formatters and validators

Use cases

  • Run quick checks without installing local dependencies.
  • Create consistent output for tickets, docs, and QA handoff.
  • Use Regex Cheatsheet to complete "regex cheatsheet" tasks faster in your browser.
  • Pair results with related tools to complete multi-step workflows.

Example

Input

Sample input (paste your real data in the tool)

Output

Processed output appears here after you run the tool

FAQ

What is Regex Cheatsheet?
Regex Cheatsheet is a free online tool designed to help you complete "regex cheatsheet" workflows with clean, copy-friendly output.
How do I use Regex Cheatsheet?
Enter your input, run the action, and copy the output into your project or documentation.
Is Regex Cheatsheet free?
Yes. You can use it directly in your browser and copy or download the result.
Why use Regex Cheatsheet instead of writing it manually?
It saves time, standardizes structure, and reduces errors by giving you a consistent baseline that you can refine for your specific requirements.

What is Regex Cheatsheet?

Reference for common regex syntax: anchors, quantifiers, character classes, groups, and flags.

FAQ

Is this tool free to use?

Yes. This tool is available to use for free.

Does the tool run in the browser?

Yes. The logic runs client-side in your browser.

Is my data uploaded to a server?

No. Your input stays in your browser and is not uploaded by this tool.

Can I use this tool for large files?

It depends on your device and browser. Very large inputs may be slow; for huge files, use a local CLI tool.

How to use

  1. Use the table as a quick reference while writing regex

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