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Download resized version of single-image pages
// ==UserScript==
// @name Resize Image Downloader
// @version 2.0
// @author SleepingGiant
// @description Download resized version of single-image pages
// @namespace https://greasyfork.org/users/1395131
// @match *://*/*.jpg
// @match *://*/*.jpeg
// @match *://*/*.png
// @match *://*/*.webp
// @grant none
// ==/UserScript==
(function () {
'use strict';
let cropLines = {};
let cropOverlay = null;
let infoBox = null;
const createUI = () => {
const container = document.createElement('div');
container.style.position = 'fixed';
container.style.top = '20px';
container.style.right = '20px';
container.style.backgroundColor = '#222';
container.style.color = 'white';
container.style.padding = '10px';
container.style.borderRadius = '10px';
container.style.zIndex = '9999';
container.style.display = 'flex';
container.style.flexDirection = 'column';
container.style.gap = '6px';
container.style.fontSize = '13px';
const createLabeledInput = (labelText, defaultValue) => {
const wrapper = document.createElement('div');
wrapper.style.display = 'flex';
wrapper.style.alignItems = 'center';
wrapper.style.gap = '4px';
const label = document.createElement('label');
label.textContent = labelText;
const input = document.createElement('input');
input.type = 'number';
input.value = defaultValue;
input.style.width = '60px';
input.style.padding = '4px';
input.style.borderRadius = '4px';
input.style.border = 'none';
wrapper.appendChild(label);
wrapper.appendChild(input);
container.appendChild(wrapper);
return input;
};
const widthInput = createLabeledInput('Width:', 1200);
const heightInput = createLabeledInput('Height:', 1200);
// Crop toggle checkbox
const cropToggle = document.createElement('label');
cropToggle.style.display = 'flex';
cropToggle.style.alignItems = 'center';
cropToggle.style.gap = '6px';
const cropCheckbox = document.createElement('input');
cropCheckbox.type = 'checkbox';
cropCheckbox.checked = false;
cropCheckbox.onchange = () => {
if (cropCheckbox.checked) {
const img = document.querySelector('img');
if (img) createCropOverlay(img);
} else {
removeCropOverlay();
}
};
cropToggle.appendChild(cropCheckbox);
cropToggle.appendChild(document.createTextNode('Enable Crop'));
container.appendChild(cropToggle);
// Scaling toggle checkbox
const scaleToggle = document.createElement('label');
scaleToggle.style.display = 'flex';
scaleToggle.style.alignItems = 'center';
scaleToggle.style.gap = '6px';
const scaleCheckbox = document.createElement('input');
scaleCheckbox.type = 'checkbox';
scaleCheckbox.checked = true;
scaleToggle.appendChild(scaleCheckbox);
scaleToggle.appendChild(document.createTextNode('Enable Scaling'));
container.appendChild(scaleToggle);
// Download button
const downloadBtn = document.createElement('button');
downloadBtn.textContent = '⬇️ Download';
styleButton(downloadBtn);
downloadBtn.onclick = () =>
downloadCroppedAndResized(
widthInput.value,
heightInput.value,
cropCheckbox.checked,
scaleCheckbox.checked
);
container.appendChild(downloadBtn);
document.body.appendChild(container);
};
const styleButton = (btn) => {
btn.style.backgroundColor = '#007acc';
btn.style.color = 'white';
btn.style.border = 'none';
btn.style.padding = '6px 10px';
btn.style.borderRadius = '6px';
btn.style.cursor = 'pointer';
btn.style.fontSize = '13px';
};
const createCropOverlay = (img) => {
const rect = img.getBoundingClientRect();
cropOverlay = document.createElement('div');
cropOverlay.style.position = 'absolute';
cropOverlay.style.left = `${rect.left + window.scrollX}px`;
cropOverlay.style.top = `${rect.top + window.scrollY}px`;
cropOverlay.style.width = `${rect.width}px`;
cropOverlay.style.height = `${rect.height}px`;
cropOverlay.style.zIndex = '9998';
cropOverlay.style.pointerEvents = 'none';
document.body.appendChild(cropOverlay);
const directions = ['left', 'right', 'top', 'bottom'];
directions.forEach(dir => {
const line = document.createElement('div');
line.className = `crop-line ${dir}`;
Object.assign(line.style, {
position: 'absolute',
backgroundColor: 'red',
pointerEvents: 'auto',
zIndex: '10000',
cursor: dir === 'left' || dir === 'right' ? 'ew-resize' : 'ns-resize',
});
if (dir === 'left' || dir === 'right') {
line.style.top = '0';
line.style.width = '2px';
line.style.height = '100%';
line.style.left = dir === 'left' ? '10px' : `${rect.width - 10}px`;
} else {
line.style.left = '0';
line.style.height = '2px';
line.style.width = '100%';
line.style.top = dir === 'top' ? '10px' : `${rect.height - 10}px`;
}
makeDraggable(line, dir, img, rect);
cropOverlay.appendChild(line);
cropLines[dir] = line;
});
// Info box
infoBox = document.createElement('div');
infoBox.style.position = 'fixed';
infoBox.style.bottom = '20px';
infoBox.style.left = '20px';
infoBox.style.background = '#000a';
infoBox.style.color = 'white';
infoBox.style.padding = '6px 10px';
infoBox.style.borderRadius = '8px';
infoBox.style.fontSize = '13px';
infoBox.style.zIndex = '9999';
document.body.appendChild(infoBox);
updateInfoBox(img, rect);
};
const removeCropOverlay = () => {
if (cropOverlay) cropOverlay.remove();
if (infoBox) infoBox.remove();
cropOverlay = null;
infoBox = null;
cropLines = {};
};
const makeDraggable = (element, direction, img, imgRect) => {
let isDragging = false;
element.addEventListener('mousedown', (e) => {
e.preventDefault();
isDragging = true;
const onMouseMove = (moveEvent) => {
if (!isDragging) return;
const delta = direction === 'left' || direction === 'right'
? moveEvent.clientX - imgRect.left
: moveEvent.clientY - imgRect.top;
if (direction === 'left' || direction === 'right') {
const clamped = Math.max(0, Math.min(delta, imgRect.width));
element.style.left = `${clamped}px`;
} else {
const clamped = Math.max(0, Math.min(delta, imgRect.height));
element.style.top = `${clamped}px`;
}
updateInfoBox(img, imgRect);
};
const onMouseUp = () => {
isDragging = false;
document.removeEventListener('mousemove', onMouseMove);
document.removeEventListener('mouseup', onMouseUp);
};
document.addEventListener('mousemove', onMouseMove);
document.addEventListener('mouseup', onMouseUp);
});
};
const getCropValues = (imgRect) => {
const left = parseInt(cropLines.left?.style.left || '0');
const right = parseInt(cropLines.right?.style.left || `${imgRect.width}`);
const top = parseInt(cropLines.top?.style.top || '0');
const bottom = parseInt(cropLines.bottom?.style.top || `${imgRect.height}`);
const cropX = Math.min(left, right);
const cropY = Math.min(top, bottom);
const cropW = Math.abs(right - left);
const cropH = Math.abs(bottom - top);
return { cropX, cropY, cropW, cropH };
};
const updateInfoBox = (img, imgRect) => {
const { cropX, cropY, cropW, cropH } = getCropValues(imgRect);
const removedLeft = cropX;
const removedTop = cropY;
const removedRight = img.naturalWidth - (cropX + cropW);
const removedBottom = img.naturalHeight - (cropY + cropH);
infoBox.innerHTML = `
<b>Crop</b><br/>
Removed: Left ${removedLeft}px, Right ${removedRight}px<br/>
Removed: Top ${removedTop}px, Bottom ${removedBottom}px<br/>
Final: ${cropW} x ${cropH}px
`;
};
const downloadCroppedAndResized = (newWidth, newHeight, cropEnabled, scaleEnabled) => {
const img = document.querySelector('img');
const rect = img.getBoundingClientRect();
let cropX = 0, cropY = 0, cropW = img.naturalWidth, cropH = img.naturalHeight;
if (cropEnabled && cropOverlay) {
const values = getCropValues(rect);
cropX = values.cropX * img.naturalWidth / rect.width;
cropY = values.cropY * img.naturalHeight / rect.height;
cropW = values.cropW * img.naturalWidth / rect.width;
cropH = values.cropH * img.naturalHeight / rect.height;
}
const finalW = scaleEnabled ? parseInt(newWidth) : cropW;
const finalH = scaleEnabled ? parseInt(newHeight) : cropH;
const canvas = document.createElement('canvas');
canvas.width = finalW;
canvas.height = finalH;
const ctx = canvas.getContext('2d');
ctx.drawImage(img, cropX, cropY, cropW, cropH, 0, 0, finalW, finalH);
canvas.toBlob(blob => {
const link = document.createElement('a');
link.href = URL.createObjectURL(blob);
link.download = `cropped_scaled_${canvas.width}x${canvas.height}.jpg`;
link.click();
}, 'image/jpeg', 0.9);
};
const interval = setInterval(() => {
const img = document.querySelector('img');
if (img && document.body) {
createUI();
clearInterval(interval);
}
}, 200);
})();