Merge PDF using JavaScript

Merge multiple PDF files into single document

Merge PDF JS module allows developers to combine multiple PDF files into a single document, reducing the time and effort required to manage large numbers of individual PDF files. Some of the key features of Merge PDF JS module include retaining page numbering, eliminating duplicate fonts for improved performance, and even generating a table of contents for the merged documents. In addition, merge PDF JS module is a RESTful JS module, which means it can be easily integrated into any application or website. All that's required is a simple JS module call, and the PDF files will be merged into a single document.

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ConvertAPI JavaScript library install

ConvertAPI provides a JavaScript module that allows you to perform a Merge PDF conversion with just a few lines of code. First, install the convertapi-js@~1.1 package from npm:

        NPM package >
    
npm i convertapi-js@~1.1

JavaScript Client GitHub

If you are interested in our old version of non-module JavaScript library you can find it here.

Authenticate your JavaScript library

Next, obtain your secret key by signing up for a free account. Once you sign up, you'll receive 250 free conversions instantly! Grab your authentication secret from the account dashboard, and authenticate the ConvertAPI JavaScript library like this:

        import ConvertApi from 'convertapi-js'
    
        let convertApi = ConvertApi.auth('your-api-secret')

Merge PDF using JavaScript in no time!

Once you have your authentication in place, simply copy-paste this pdf to merge conversion code snippet into your JavaScript project. Merge PDF documents using JavaScript with no effort at all!

// Code snippet is using the ConvertAPI JavaScript Client: https://github.com/ConvertAPI/convertapi-js

// Code snippet is using the ConvertAPI Node.js Client: https://github.com/ConvertAPI/convertapi-nodejs

// Code snippet is using the ConvertAPI PHP Client: https://github.com/ConvertAPI/convertapi-php

// Code snippet is using the ConvertAPI Java Client: https://github.com/ConvertAPI/convertapi-java

// Code snippet is using the ConvertAPI C# Client: https://github.com/ConvertAPI/convertapi-dotnet

# Code snippet is using the ConvertAPI Ruby Client: https://github.com/ConvertAPI/convertapi-ruby

# Code snippet is using the ConvertAPI Python Client: https://github.com/ConvertAPI/convertapi-python

// Code snippet is using the ConvertAPI Go Client: https://github.com/ConvertAPI/convertapi-go

REM Code snippet is using the command line utility program: https://github.com/ConvertAPI/convertapi-cli

Upload the file and see how it works

You can set up the advanced conversion parameters and test the conversion result online using our interactive demo tool. It will auto-generate the code snippet for you!

Advanced Merge PDF conversion parameters

Password String

Sets the password to open protected documents.

RetainNumbering Bool

Keeps the original PDF labels numbering rather than re-numbering merged PDF from the 1 page.

RemoveDuplicateFonts Bool

Do not include the same fonts from source PDFs while merging.

BookmarksToc Collection

Adds a top-level bookmark for each file, using the filename or PDF title from metadata.

Values: disabled filename title

PageSize Collection

The property scales each page to fit a given page size.

Values: default a0 a1 a2 a3 a4 a5 a6 a7 a8 a9 a10 letter legal

PageOrientation Collection

Set page orientation, works only along with PageSize property.

Values: default portrait landscape

OpenPage Integer

Set the page number at which the PDF document should open.