Simple NodeJS based workflow for 1) resizing images & 2) cropping them.

crop.js

const sharp = require('sharp');
const fs = require('fs');
const path = require('path');

// Input and Output Directories
const inputDir = 'images-resized';
const outputDir = 'images-cropped';

// Ensure the output directory exists
if (!fs.existsSync(outputDir)) {
    fs.mkdirSync(outputDir, { recursive: true });
}

// Function to process images recursively
function processImages(inputPath, outputPath) {
    // Read the directory
    fs.readdirSync(inputPath).forEach(file => {
        const inputFilePath = path.join(inputPath, file);
        const outputFilePath = path.join(outputPath, file);

        if (fs.statSync(inputFilePath).isDirectory()) {
            // If it's a directory, create the corresponding output directory and recurse
            if (!fs.existsSync(outputFilePath)) {
                fs.mkdirSync(outputFilePath, { recursive: true });
            }
            processImages(inputFilePath, outputFilePath);
        } else if (file.toLowerCase().endsWith('.png')) {
            // If it's a PNG image, process it
            sharp(inputFilePath)
                .trim() // Automatically crop transparent borders
                .toFile(outputFilePath)
                .then(() => console.log(`Cropped and saved: ${outputFilePath}`))
                .catch(err => console.error(`Error processing ${inputFilePath}:`, err));
        }
    });
}

// Start the recursive process
processImages(inputDir, outputDir);

resize.js

const sharp = require('sharp');
const fs = require('fs');
const path = require('path');

// Input and Output Directories
const inputDir = 'images';
const outputDir = 'images-resized';

// Resize dimensions
const width = 180
const height = 180

// Ensure the output directory exists
if (!fs.existsSync(outputDir)) {
    fs.mkdirSync(outputDir, { recursive: true });
}

// Function to process images recursively
function processImages(inputPath, outputPath) {
    // Read the directory
    fs.readdirSync(inputPath).forEach(file => {
        const inputFilePath = path.join(inputPath, file);
        const outputFilePath = path.join(outputPath, file);

        if (fs.statSync(inputFilePath).isDirectory()) {
            // If it's a directory, create the corresponding output directory and recurse
            if (!fs.existsSync(outputFilePath)) {
                fs.mkdirSync(outputFilePath, { recursive: true });
            }
            processImages(inputFilePath, outputFilePath);
        } else if (file.toLowerCase().endsWith('.png')) {
            // If it's a PNG image, resize it
            sharp(inputFilePath)
                .resize(width, height, {
                    fit: 'inside', // Maintain aspect ratio and fit within the dimensions
                    withoutEnlargement: true, // Avoid enlarging smaller images
                })
                .toFile(outputFilePath)
                .then(() => console.log(`Resized and saved: ${outputFilePath}`))
                .catch(err => console.error(`Error processing ${inputFilePath}:`, err));
        }
    });
}

// Start the recursive process
processImages(inputDir, outputDir);