Compress PDF using JavaScript

Compress and reduce a PDF file size by up to 90%

Compress PDF features

The Compress PDF JS module by ConvertAPI is a tool that allows for the compression and reduction of PDF file sizes by up to 90%. This JS module optimizes PDF quality by compressing text, graphics, images, subsetting fonts, and optimizing document structure. It offers various parameters for customization, including compression presets, color and grayscale image compression, and options to remove elements like bookmarks, annotations, forms, and embedded files from the PDF. The JS module also provides options for optimizing the PDF for web viewing and preserving the PDF/A standard.

ConvertAPI JavaScript library install

ConvertAPI provides a JavaScript module that allows you to perform a Compress 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('secret_or_token')

Compress PDF using JavaScript in no time!

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

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

Try the conversion online - no coding required!

You can try out advanced conversion parameters and test the conversion result online using our interactive demo tool. This tool will produce the same conversion output as if you were using the library from your solution, and it will auto-generate the code snippet for you!

Try for FREE!

Conversion parameters

Preset Collection

Choose a compression level from the available presets. If a preset is selected, all other compression options will be ignored. These presets are optimized for various use cases, such as balancing file size and quality.

Values: none text archive web ebook printer

ImageResolution Integer

Set the maximum image resolution in DPI.

ImageQuality Integer

Set image quality in percentage.

RemoveForms Bool

Remove PDF forms from the PDF file.

RemoveDuplicates Bool

Remove duplicate fonts and color profiles from the PDF file.

RemovePieceInformation Bool

Remove piece information dictionaries like Adobe Illustrator or Photoshop private data.

RemoveEmbeddedFiles Bool

Remove embedded/attachments files from the PDF file.

RemoveStructureInformation Bool

Remove all structure information from the PDF document.

RemoveMetadata Bool

Detach the XMP metadata embedded in the document from its catalog, clear all properties in all schemas, and remove metadata from marked content.

RemoveUnusedResources Bool

Remove references to resources such as fonts, images, patterns.

UnembedBaseFonts Bool

Specifies whether to remove the base fonts from the PDF file.

SubsetEmbeddedFonts Bool

Output PDF should only contain font characters utilized in the original document, and any unused glyphs from all fonts in the document should be removed.

Optimize Bool

Optimize page content streams in the PDF file.

Linearize Bool

Linearize PDF file and optimize for fast Web View.

PreservePdfa Bool

Preserve the PDF/A standard in the PDF file.