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Compress images in React: Browser Image Compression Libary

I recently got interested in compressing images on the client-side for a couple of reasons:

  • Reduce my cloudinary bandwidth and storage usage
  • Users were complaining about long waits while uploading images

So I ventured to look for a library that will help me solve this fast and easy, maybe in the future I might build my own from scratch.

So I came by a couple of libraries that will help in compressing images on the client-side.

Browser Image Compression

  1. Install it with your favorite package manager
   npm install browser-image-compression --save
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   yarn add browser-image-compression
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  1. Create your react component
   import React from "react";

   class App extends React.Component {
     onChange = async (e) => {
       // Some onchange event calls

     render() {
       return (
         <input name="file" id="file" onChange={this.onChange} type="files" />
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  1. Start compressing
   import Compress from "browser-image-compression";

   onChange = (e) => {
       // Get the files selected from the input tag
       // On select files always come in an array even
       // if you choose one its the first index
       // if you selected a couple then loop through the array
       const file =[0]

       // Compression config
       const options = {
           // As the key specify the maximum size
           // Leave blank for infinity
           maxSizeMB: 1.5,
           // Use webworker for faster compression with
           // the help of threads
           useWebWorker: true

       // Initialize compression
       // First argument is the file object from the input
       // Second argument is the options object with the
       // config
       Compress(file, options)
           .then(compressedBlob => {
               // Compressed file is of Blob type
               // You can drop off here if you want to work with a Blob file

               // If you want to work with the File
               // Let's convert it here, by adding a couple of attributes
               compressedBlob.lastModifiedDate = new Date()

               // Conver the blob to file
               const convertedBlobFile = new File([compressedBlob],, { type: file.type, lastModified:})

               // Here you are free to call any method you are gonna use to upload your file example uploadToCloudinaryUsingPreset(convertedBlobFile)
           .catch(e => {
               // Show the user a toast message or notification that something went wrong while compressing file
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Next, we will cover using react-image-file-resizer library

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