In this tutorial, I will teach you how to make an Image Editor Using JavaScript, HTML5, and CSS3. The complete source code of this JavaScript image editor is given below.
I have also provided a download link at the end of this article through which you can download the full source code (including image files).
JavaScript Image Editor Source Code
index.html
<!DOCTYPE html>
<html lang="en" dir="ltr">
<head>
<meta charset="utf-8">
<title>Image Editor JavaScript</title>
<link rel="stylesheet" href="style.css">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link rel="stylesheet" href="https://unpkg.com/[email protected]/css/boxicons.min.css">
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.1.1/css/all.min.css"/>
</head>
<body>
<div class="container disable">
<h2>Easy Image Editor</h2>
<div class="wrapper">
<div class="editor-panel">
<div class="filter">
<label class="title">Filters</label>
<div class="options">
<button id="brightness" class="active">Brightness</button>
<button id="saturation">Saturation</button>
<button id="inversion">Inversion</button>
<button id="grayscale">Grayscale</button>
</div>
<div class="slider">
<div class="filter-info">
<p class="name">Brighteness</p>
<p class="value">100%</p>
</div>
<input type="range" value="100" min="0" max="200">
</div>
</div>
<div class="rotate">
<label class="title">Rotate & Flip</label>
<div class="options">
<button id="left"><i class="fa-solid fa-rotate-left"></i></button>
<button id="right"><i class="fa-solid fa-rotate-right"></i></button>
<button id="horizontal"><i class='bx bx-reflect-vertical'></i></button>
<button id="vertical"><i class='bx bx-reflect-horizontal' ></i></button>
</div>
</div>
</div>
<div class="preview-img">
<img src="image-placeholder.svg" alt="preview-img">
</div>
</div>
<div class="controls">
<button class="reset-filter">Reset Filters</button>
<div class="row">
<input type="file" class="file-input" accept="image/*" hidden>
<button class="choose-img">Choose Image</button>
<button class="save-img">Save Image</button>
</div>
</div>
</div>
<script src="script.js"></script>
</body>
</html>script.js
const fileInput = document.querySelector(".file-input"),
filterOptions = document.querySelectorAll(".filter button"),
filterName = document.querySelector(".filter-info .name"),
filterValue = document.querySelector(".filter-info .value"),
filterSlider = document.querySelector(".slider input"),
rotateOptions = document.querySelectorAll(".rotate button"),
previewImg = document.querySelector(".preview-img img"),
resetFilterBtn = document.querySelector(".reset-filter"),
chooseImgBtn = document.querySelector(".choose-img"),
saveImgBtn = document.querySelector(".save-img");
let brightness = "100", saturation = "100", inversion = "0", grayscale = "0";
let rotate = 0, flipHorizontal = 1, flipVertical = 1;
const loadImage = () => {
let file = fileInput.files[0];
if(!file) return;
previewImg.src = URL.createObjectURL(file);
previewImg.addEventListener("load", () => {
resetFilterBtn.click();
document.querySelector(".container").classList.remove("disable");
});
}
const applyFilter = () => {
previewImg.style.transform = `rotate(${rotate}deg) scale(${flipHorizontal}, ${flipVertical})`;
previewImg.style.filter = `brightness(${brightness}%) saturate(${saturation}%) invert(${inversion}%) grayscale(${grayscale}%)`;
}
filterOptions.forEach(option => {
option.addEventListener("click", () => {
document.querySelector(".active").classList.remove("active");
option.classList.add("active");
filterName.innerText = option.innerText;
if(option.id === "brightness") {
filterSlider.max = "200";
filterSlider.value = brightness;
filterValue.innerText = `${brightness}%`;
} else if(option.id === "saturation") {
filterSlider.max = "200";
filterSlider.value = saturation;
filterValue.innerText = `${saturation}%`
} else if(option.id === "inversion") {
filterSlider.max = "100";
filterSlider.value = inversion;
filterValue.innerText = `${inversion}%`;
} else {
filterSlider.max = "100";
filterSlider.value = grayscale;
filterValue.innerText = `${grayscale}%`;
}
});
});
const updateFilter = () => {
filterValue.innerText = `${filterSlider.value}%`;
const selectedFilter = document.querySelector(".filter .active");
if(selectedFilter.id === "brightness") {
brightness = filterSlider.value;
} else if(selectedFilter.id === "saturation") {
saturation = filterSlider.value;
} else if(selectedFilter.id === "inversion") {
inversion = filterSlider.value;
} else {
grayscale = filterSlider.value;
}
applyFilter();
}
rotateOptions.forEach(option => {
option.addEventListener("click", () => {
if(option.id === "left") {
rotate -= 90;
} else if(option.id === "right") {
rotate += 90;
} else if(option.id === "horizontal") {
flipHorizontal = flipHorizontal === 1 ? -1 : 1;
} else {
flipVertical = flipVertical === 1 ? -1 : 1;
}
applyFilter();
});
});
const resetFilter = () => {
brightness = "100"; saturation = "100"; inversion = "0"; grayscale = "0";
rotate = 0; flipHorizontal = 1; flipVertical = 1;
filterOptions[0].click();
applyFilter();
}
const saveImage = () => {
const canvas = document.createElement("canvas");
const ctx = canvas.getContext("2d");
canvas.width = previewImg.naturalWidth;
canvas.height = previewImg.naturalHeight;
ctx.filter = `brightness(${brightness}%) saturate(${saturation}%) invert(${inversion}%) grayscale(${grayscale}%)`;
ctx.translate(canvas.width / 2, canvas.height / 2);
if(rotate !== 0) {
ctx.rotate(rotate * Math.PI / 180);
}
ctx.scale(flipHorizontal, flipVertical);
ctx.drawImage(previewImg, -canvas.width / 2, -canvas.height / 2, canvas.width, canvas.height);
const link = document.createElement("a");
link.download = "image.jpg";
link.href = canvas.toDataURL();
link.click();
}
filterSlider.addEventListener("input", updateFilter);
resetFilterBtn.addEventListener("click", resetFilter);
saveImgBtn.addEventListener("click", saveImage);
fileInput.addEventListener("change", loadImage);
chooseImgBtn.addEventListener("click", () => fileInput.click());style.css
/* Import Google font - Poppins */
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;500;600&display=swap');
*{
margin: 0;
padding: 0;
box-sizing: border-box;
font-family: 'Poppins', sans-serif;
}
body{
display: flex;
padding: 10px;
min-height: 100vh;
align-items: center;
justify-content: center;
background: #E3F2FD;
}
.container{
width: 850px;
padding: 30px 35px 35px;
background: #fff;
border-radius: 10px;
box-shadow: 0 10px 20px rgba(0,0,0,0.1);
}
.container.disable .editor-panel,
.container.disable .controls .reset-filter,
.container.disable .controls .save-img{
opacity: 0.5;
pointer-events: none;
}
.container h2{
margin-top: -8px;
font-size: 22px;
font-weight: 500;
}
.container .wrapper{
display: flex;
margin: 20px 0;
min-height: 335px;
}
.wrapper .editor-panel{
padding: 15px 20px;
width: 280px;
border-radius: 5px;
border: 1px solid #ccc;
}
.editor-panel .title{
display: block;
font-size: 16px;
margin-bottom: 12px;
}
.editor-panel .options, .controls{
display: flex;
flex-wrap: wrap;
justify-content: space-between;
}
.editor-panel button{
outline: none;
height: 40px;
font-size: 14px;
color: #6C757D;
background: #fff;
border-radius: 3px;
margin-bottom: 8px;
border: 1px solid #aaa;
}
.editor-panel .filter button{
width: calc(100% / 2 - 4px);
}
.editor-panel button:hover{
background: #f5f5f5;
}
.filter button.active{
color: #fff;
border-color: #5372F0;
background: #5372F0;
}
.filter .slider{
margin-top: 12px;
}
.filter .slider .filter-info{
display: flex;
color: #464646;
font-size: 14px;
justify-content: space-between;
}
.filter .slider input{
width: 100%;
height: 5px;
accent-color: #5372F0;
}
.editor-panel .rotate{
margin-top: 17px;
}
.editor-panel .rotate button{
display: flex;
align-items: center;
justify-content: center;
width: calc(100% / 4 - 3px);
}
.rotate .options button:nth-child(3),
.rotate .options button:nth-child(4){
font-size: 18px;
}
.rotate .options button:active{
color: #fff;
background: #5372F0;
border-color: #5372F0;
}
.wrapper .preview-img{
flex-grow: 1;
display: flex;
overflow: hidden;
margin-left: 20px;
border-radius: 5px;
align-items: center;
justify-content: center;
}
.preview-img img{
max-width: 490px;
max-height: 335px;
width: 100%;
height: 100%;
object-fit: contain;
}
.controls button{
padding: 11px 20px;
font-size: 14px;
border-radius: 3px;
outline: none;
color: #fff;
cursor: pointer;
background: none;
transition: all 0.3s ease;
text-transform: uppercase;
}
.controls .reset-filter{
color: #6C757D;
border: 1px solid #6C757D;
}
.controls .reset-filter:hover{
color: #fff;
background: #6C757D;
}
.controls .choose-img{
background: #6C757D;
border: 1px solid #6C757D;
}
.controls .save-img{
margin-left: 5px;
background: #5372F0;
border: 1px solid #5372F0;
}
@media screen and (max-width: 760px) {
.container{
padding: 25px;
}
.container .wrapper{
flex-wrap: wrap-reverse;
}
.wrapper .editor-panel{
width: 100%;
}
.wrapper .preview-img{
width: 100%;
margin: 0 0 15px;
}
}
@media screen and (max-width: 500px) {
.controls button{
width: 100%;
margin-bottom: 10px;
}
.controls .row{
width: 100%;
}
.controls .row .save-img{
margin-left: 0px;
}
}Project Screenshots
