remark-unlink-protocols

remark plugin to turn links into plain text based on their protocols.

Contents

• What is this?
• When should I use this?
• Install
• Use
• API
• Types
• Compatibility
• Security
• Contribute
• License

What is this?

This package is a unified (remark) plugin to remove all links that use other protocols than the ones specified (http and https by default).

When should I use this?

This project is useful if you want to limit the protocols that can be linked to when processing markdown.

Install

This package is ESM only. In Node.js (version 16+), install with npm:

npm install remark-unlink-protocols

Use

Say we have the following file example.md and apply remark-unlink-protocols with the default protocols (http and https).

# Uranus

**Uranus** is the seventh [planet](/wiki/Planet 'Planet') from the Sun and is a
gaseous cyan [ice giant](/wiki/Ice_giant 'Ice giant').

Photograph of Uranus in true colour by Voyager 2 in 1986:

![This is an image of the planet Uranus taken by the spacecraft Voyager 2 in 1986.
The Voyager project is managed for NASA by the Jet Propulsion Laboratory.](<https://en.wikipedia.org/wiki/Uranus#/media/File:Uranus_as_seen_by_NASA's_Voyager_2_(remastered)_-_JPEG_converted.jpg>)

Send comments to [me](mailto:test@domain.example)

…and a module example.js:

import {remark} from 'remark'
import remarkUnlinkProtocols from 'remark-unlink-protocols'
import {read} from 'to-vfile'

const file = await remark()
  .use(remarkUnlinkProtocols, { except: 'mailto' })
  .process(await read('example.md'))

console.log(String(file))

…then running node example.js yields:

# Uranus

**Uranus** is the seventh planet from the Sun and is a
gaseous cyan ice giant.

Photograph of Uranus in true colour by Voyager 2 in 1986:

![This is an image of the planet Uranus taken by the spacecraft Voyager 2 in 1986.
The Voyager project is managed for NASA by the Jet Propulsion Laboratory.](<https://en.wikipedia.org/wiki/Uranus#/media/File:Uranus_as_seen_by_NASA's_Voyager_2_(remastered)_-_JPEG_converted.jpg>)

The Voyager project is managed for NASA by the Jet Propulsion
Laboratory.

Send comments to [me](mailto:test@domain.example).

API

This package exports no identifiers. The default export is remarkUnlinkProtocols.

unified().use(remarkUnlinkProtocols)

Remove all links and references that do not use the http or https protocols.

Parameters

except: string[] - protocols to keep - ['http', 'https'] by default.

Returns

Transform (Transformer).

Types

This package is fully typed with TypeScript. It exports no additional types.

Compatibility

The current release, remark-unlink-protocols@^1 is compatible with Node.js 22.

This plugin works with unified version 3+ and remark version 4+.

Security

Use of remark-unlink-protocols does not involve rehype (hast) or user content so there are no openings for cross-site scripting (XSS) attacks.

Contribute

Nextcloud and Remarkjs have a code of conduct. By interacting with the respective repositories, organization, or community you agree to abide by its terms.

License

MIT © 2025 Nextcloud GmbH and Nextcloud contributors