is-png

Check if a Buffer/Uint8Array is a PNG image

Install

$ npm install is-png

Usage

Node.js

import {readChunk} from 'read-chunk';
import isPng from 'is-png';

const buffer = await readChunk('unicorn.png', {length: 8});

isPng(buffer);
//=> true

Browser

import isPng from 'is-png';

const response = await fetch('unicorn.png');
const buffer = await response.arrayBuffer();

isPng(new Uint8Array(buffer));
//=> true

API

isPng(buffer)

Accepts a Buffer (Node.js) or Uint8Array. Returns a boolean of whether buffer is a PNG image.

buffer

The buffer to check. It only needs the first 8 bytes.

Related

• file-type - Detect the file type of a Buffer/Uint8Array/ArrayBuffer