web-image-converter

Convert images directly in the browser using WebAssembly — no server or Node.js required.

Features

• 🖼️ Convert images to PNG, JPEG, WebP, or BMP
• 🧠 Automatically detects input format
• ⚙️ Powered by Rust & WebAssembly
• 💡 Runs entirely in the browser (frontend only)

Installation

npm install web-image-converter

Usage

import init, { jpeg, png, webp, bmp } from "web-image-converter";

const toPng = async (image: Uint8Array): Promise<Uint8Array> => {
  await init();
  return png().convert(image);
};

const toJpeg = async (image: Uint8Array): Promise<Uint8Array> => {
  await init();
  return jpeg().convert(image);
};

const toWebp = async (image: Uint8Array): Promise<Uint8Array> => {
  await init();
  return webp().convert(image);
};

const toBmp = async (image: Uint8Array): Promise<Uint8Array> => {
  await init();
  return bmp().convert(image);
};

Input

• image: Uint8Array containing the image data.
• Format (JPEG, PNG, WebP, BMP) is auto-detected.

Output

• Uint8Array containing the converted image.

[!TIP] To avoid blocking the main UI thread during image processing, it is strongly recommended to use this library inside a Web Worker.

License

This project is licensed under the MIT License.

[!NOTE] Since this library uses Rust crates compiled to WebAssembly with static linking, third-party licenses of all linked dependencies are automatically bundled into the NPM package. You can find the list of these licenses in the included LICENSE or equivalent file.

This ensures compliance with all licenses, including transitive dependencies of the WebAssembly module.