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 resized image's new base64 URI or Blob. The URI can be used as the source of an <Image> component.

Setup

Install the package:

npm i 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 image which will resized.
  maxWidth, // Is the maxWidth of the resized new image.
  maxHeight, // Is the maxHeight of the resized new image.
  compressFormat, // Is the compressFormat of the resized new image.
  quality, // Is the quality of the resized new image.
  rotation, // Is the degree of clockwise rotation to apply to uploaded image.
  responseUriFunc, // Is the callBack function of the resized new image URI.
  outputType, // Is the output type of the resized new image.
  minWidth, // Is the minWidth of the resized new image.
  minHeight // Is the minHeight of the resized new image.
);

Example 1

First, wrap the resizer:

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

const resizeFile = (file) =>
  new Promise((resolve) => {
    Resizer.imageFileResizer(
      file,
      300,
      300,
      "JPEG",
      100,
      0,
      (uri) => {
        resolve(uri);
      },
      "base64"
    );
  });

And then use it in your async function:

const onChange = async (event) => {
  try {
    const file = event.target.files[0];
    const image = await resizeFile(file);
    console.log(image);
  } catch (err) {
    console.log(err);
  }
};

Example 2

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);
    this.state = {
      newImage: "",
    };
  }

  fileChangedHandler(event) {
    var fileInput = false;
    if (event.target.files[0]) {
      fileInput = true;
    }
    if (fileInput) {
      try {
        Resizer.imageFileResizer(
          event.target.files[0],
          300,
          300,
          "JPEG",
          100,
          0,
          (uri) => {
            console.log(uri);
            this.setState({ newImage: uri });
          },
          "base64",
          200,
          200
        );
      } catch (err) {
        console.log(err);
      }
    }
  }

  render() {
    return (
      <div className="App">
        <input type="file" onChange={this.fileChangedHandler} />
        <img src={this.state.newImage} alt="" />
      </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 | Degree of clockwise 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, blob or file.(Default type is base64) | string | No | | minWidth | New image min width (ratio is preserved, defaults to null) | number | No | | minHeight | New image min height (ratio is preserved, defaults to null) | number | No |

License

MIT

Contributors

Thanks goes to these wonderful people (emoji key):

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