Optimize Tools
Compress PDF JavaScript Overview
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.
Lightning-Fast Compression
Shrink your PDFs in just a few seconds without compromising quality.
Advanced Image Recompression
Force image recompression to ensure even pre‑compressed images get smaller.
Compression without losing quality
Maintain visual quality of the original file while dramatically reducing file size.
Preserve Fonts & Vectors
Compression keeps text, fonts, and vector graphics sharp.
Multiple Compression Levels
Choose from predefined compression presets or set up your own settings.
Secure by Design
File compression is encrypted and compliant with ISO, GDPR, and HIPAA.
Customizable Parameters
Fine-tune your automation with these powerful conversion options
File
File Supported formats: .pdfFile to be converted. Value can be URL or file content.
Password
StringSets the password to open protected PDF.
Preset
Collection Default: noneChoose 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 lossless text archive web ebook printerImageResolution
Integer Default: 150Set the maximum image resolution in DPI.
Range: 10 .. 800ImageQuality
Integer Default: 80Set image quality in percentage.
Range: 10 .. 100UnembedBaseFonts
Bool Default: FalseSpecifies whether to remove the base fonts from the PDF file.
SubsetEmbeddedFonts
Bool Default: FalseOutput 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 Default: TrueOptimize page content streams in the PDF file.
Linearize
Bool Default: FalseLinearize PDF file and optimize for fast Web View.
PreservePdfa
Bool Default: FalsePreserve the PDF/A standard in the PDF file.
RemoveForms
Bool Default: FalseRemove PDF forms from the PDF file.
RemoveDuplicates
Bool Default: TrueRemove duplicate fonts and color profiles from the PDF file.
RemovePieceInformation
Bool Default: TrueRemove piece information dictionaries like Adobe Illustrator or Photoshop private data.
RemoveEmbeddedFiles
Bool Default: TrueRemove embedded/attachments files from the PDF file.
RemoveStructureInformation
Bool Default: TrueRemove all structure information from the PDF document.
RemoveMetadata
Bool Default: TrueDetach the XMP metadata embedded in the document from its catalog, clear all properties in all schemas, and remove metadata from marked content.
RemoveUnusedResources
Bool Default: TrueRemove references to resources such as fonts, images, patterns.
StoreFile
Bool Default: FalseWhen the StoreFile parameter is set to True, your converted file is written to ConvertAPI’s encrypted, temporary storage and made available via a time-limited secure download URL, valid for up to 3 hours. After this period, the file is permanently deleted.
When StoreFile is set to False, conversion happens entirely in-memory. The raw file bytes are streamed back in the API response without touching disk or external storage, ensuring maximum security and zero persistence so that only you can access the content.
Step-by-Step Guide
Easy Compress PDF integration programmatically using our simple JavaScript SDK
1. 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
If you are interested in our old version of non-module JavaScript library you can find it here.
2. Authenticate your JavaScript library
Next, obtain your API Token by signing up for a free account. Once you sign up, you'll receive 250 free conversions instantly! Grab your API Token from the account dashboard, and authenticate the ConvertAPI JavaScript library like this:
import ConvertApi from 'convertapi-js'
let convertApi = ConvertApi.auth('api_token')
3. 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!
Integrate within minutes
Easy Compress PDF automation using our simple JavaScript SDK
Compatible With all JavaScript Frameworks & Tools
Businesses trust us
Highest rated File Conversion API on major B2B software listing platforms: Capterra, G2, and Trustpilot.
"ConvertAPI has been a game-changer for our document automation workflows. Their conversion accuracy and API reliability are unmatched in the industry for over 7 years."
"ConvertAPI is a reliable, cost-effective solution with a proven track record of stability. It has grown significantly in maturity, adopting enterprise-grade practices over the years."
"We've integrated ConvertAPI across our entire document processing platform. The performance is exceptional and the support team is always responsive. Highly recommended!"
Enterprise-Grade Security
We ensure that all document processing is handled securely in the cloud, adhering to industry-leading standards like ISO 27001, GDPR, and HIPAA. To enhance security even further, we can ensure that no files or data are stored on our servers and never leave your country.
Learn more about security