---
title: Custom JS
slug: custom-js
image: https://make-cxp-documentation.ams3.digitaloceanspaces.com/apps-center-icons/PREVIEW_custom-js.png
createdAt: 2025-08-12T13:14:48.851Z
---

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Custom JS is a platform that enables users to execute JavaScript with NPM modules, create PDFs, capture screenshots, and integrate seamlessly with automation platforms. 

With the Custom JS app in Make, you can run commands and code, manage PDF files and images, crawl websites, and check SSL in your Custom JS account.
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# Requirements

To use the Custom JS app in Make, you must have a [Custom JS account](https://app.customjs.io/?_gl=1*13lr373*_gcl_au*MTk4OTg2MDIyMi4xNzU1MDA0ODUx#/login).

# Connect Custom JS and Make 

To get started, you must first create a connection between Custom JS and Make, allowing the two services to communicate.

To create the connection, you need to:

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[Obtain an Api Key in your Custom JS account](docId:8gQut-WtIS2pZoVCINk5c). 
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[Create the connection in Make](docId:8gQut-WtIS2pZoVCINk5c). 
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## Obtain your API Key in Custom JS

Before you create the connection in Make, you should first obtain an API Key in your Custom JS account.

To obtain the APIKey:

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Log in to your Custom JS account.
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On the right side, click **Show** under **Your Api Key.**
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Copy the **Api Key** value and store it in a safe place.
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You'll use this value in the **API Key** connection field in Make.

## Create the connection in Make 

Once you have your Custom JS Api Key, you're ready to create the connection in Make. 

To create the connection:

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Log in to your Make account, add a Custom JS module to your scenario, and click **Create a connection**.
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Optional: In the ​​**Connection name​​** field, enter a name for the connection.
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In the ​​**API Key** field, enter the Api Key you copied from your Custom JS account. 
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Click **Save**.
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If prompted, authenticate your account and confirm access.
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You've successfully created the connection and can now use the Custom JS app in your scenarios. If you want to make changes to your connection in the future, follow the steps [here](https://help.make.com/connect-an-application#tN2pJ).

# Custom JS modules

After connecting to the Custom JS app, you can use the following types of modules to build your scenarios. 

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**JavaScript**

- Execute inline JavaScript Code
- Execute a stored JS function
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**Scraping / Screenshots**

- Web Scraper for HTML Extraction with Browser Automation
- Take Website Screenshots via Browser Automation
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**PDF / Image**

- PDF Generator (from HTML)
- Get PDF Form Fields
- PDF Form Fill (Fill PDF Fields)
- Merge PDFs
- Generate PNG (from HTML)
- Compress Pdf
- Pdf To Text
- PDF To PNG
- Extract Pages From PDF
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**Other**

- Run Puppeteer
- SSL Checker (SSL Certificate)
- Execute inline Python Code
- HTML to DOCX (Word)
- Markdown to HTML Converter
- Invoice PDF Generator
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**Deprecated**

- Create Screenshot \[Deprecated]
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# Custom JS resources

- [Custom JS API documentation](https://www.customjs.space/api/docs)