React Image File Resizer

react-image-file-resizer is a react module that can rescaled local images.

• You can change image's width, height, format, rotation and quality.
• It returns of new image's base64 URI or Blob. The URI can be used as the source of an <Image> component.

Setup

Install the package:

npm install --save react-image-file-resizer

or

yarn add react-image-file-resizer

Usage

import Resizer from 'react-image-file-resizer';

Resizer.imageFileResizer(
    file, //is the file of the new image that can now be uploaded...
    maxWidth, // is the maxWidth of the  new image
    maxHeight, // is the maxHeight of the  new image
    compressFormat, // is the compressFormat of the  new image
    quality, // is the quality of the  new image
    rotation, // is the rotatoion of the  new image
    responseUriFunc,  // is the callBack function of the new image URI
    outputType  // is the output type of the new image
    );

Example

import React, { Component } from 'react';
import Resizer from 'react-image-file-resizer';

class App extends Component {
    constructor(props) {
        super(props);
        this.fileChangedHandler = this.fileChangedHandler.bind(this);
    }

    fileChangedHandler(event) {
        var fileInput = false
        if(event.target.files[0]) {
            fileInput = true
        }
        if(fileInput) {
            Resizer.imageFileResizer(
                event.target.files[0],
                300,
                300,
                'JPEG',
                100,
                0,
                uri => {
                    console.log(uri)
                },
                'base64'
            );
        }
    }

    render() {
        return (
            <div className="App">
                <input type="file" onChange={this.fileChangedHandler}/>
            </div>
        );
    }
}

export default App;

Option	Description	Type	Required
file	Path of image file	object	Yes
maxWidth	New image max width (ratio is preserved)	number	Yes
maxHeight	New image max height (ratio is preserved)	number	Yes
compressFormat	Can be either JPEG, PNG or WEBP.	string	Yes
quality	A number between 0 and 100. Used for the JPEG compression.(if no compress is needed, just set it to 100)	number	Yes
rotation	Rotation to apply to the image. Rotation is limited to multiples of 90 degrees.(if no rotation is needed, just set it to 0) (0, 90, 180, 270, 360)	number	Yes
responseUriFunc	Callback function of URI. Returns URI of resized image's base64 format. ex: uri => {console.log(uri)});	function	Yes
outputType	Can be either base64 or blob.(Default type is base64)	string	No

License

MIT

Contributors

Thanks goes to these wonderful people (emoji key):

Ahmad Maleki 💻 🚧

Martin Vyšňovský 💻 🚧

Nadun Chamikara 💻 🚧

This project follows the all-contributors specification. Contributions of any kind welcome!