# Regex Cheatsheet Guide

A quick reference of regular-expression syntax.

- Tool: https://ilham.dev/tools/regex-cheatsheet/
- Guide URL: https://ilham.dev/guides/regex-cheatsheet/
- Tool guides index: https://ilham.dev/guides/tools/
- Broader guide: Testing Regex Before Shipping It (https://ilham.dev/guides/regex-testing/)

## What it does

A searchable reference for regular-expression syntax: character classes, anchors, quantifiers, groups, lookarounds and the flags that change how matching behaves.

## Use the tool

Open https://ilham.dev/tools/regex-cheatsheet/, add the input the tool asks for, run it, and check the output before using it elsewhere.

## Input and output

- Input: text.
- Output: text.
- Category: Workflow.

## Privacy and processing
Processing happens locally in your browser. This tool does not upload the input to ilham.dev.

## Questions

### Which dialect does this describe?

The syntax is common to most engines. Where JavaScript, PCRE and POSIX diverge, the entry says so explicitly.