## jscpd
[](https://www.npmjs.com/package/jscpd)
[](https://github.com/kucherenko/jscpd/blob/master/LICENSE)
[](https://www.npmjs.com/package/jscpd)
[](https://codecov.io/gh/kucherenko/jscpd)
[](https://app.fossa.io/projects/git%2Bgithub.com%2Fkucherenko%2Fjscpd?ref=badge_shield)
[](#backers)
[](#sponsors)
[](https://nodei.co/npm/jscpd/)
> Copy/paste detector for programming source code, supports [150+ formats](../../supported_formats.md).
Copy/paste is a common technical debt on a lot of projects. The jscpd gives the ability to find duplicated blocks implemented on more than 150 programming languages and digital formats of documents.
The jscpd tool implements [Rabin-Karp](https://en.wikipedia.org/wiki/Rabin%E2%80%93Karp_algorithm) algorithm for searching duplications.
## Table of content
- [Features](#features)
- [Getting started](#getting-started)
- [Installation](#installation)
- [Usage](#usage)
- [JSCPD Server](#jscpd-server)
- [Options](#options)
- [Config File](#config-file)
- [Ignored Blocks](#ignored-blocks)
- [Reporters](#jscpd-reporters)
- [HTML](#html)
- [Badge](#badge)
- [PMD CPD XML](#pmd-cpd-xml)
- [JSON](#json-reporters)
- [API](#api)
- [Changelog](#changelog)
- [Who uses jscpd](#who-uses-jscpd)
- [Contributors](#contributors)
- [Backers](#backers)
- [Sponsors](#sponsors)
- [License](#license)
## Features
- Detect duplications in programming source code, use semantic of programing languages, can skip comments, empty lines etc.
- Detect duplications in embedded blocks of code, like `