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Build An Image Editor in HTML CSS & JavaScript

Hey friends, today in this blog, you’ll learn to create a new project named Build An Basic Image Editor in HTML CSS & JavaScript. Previously,

In this project (Image Editor in JavaScript), as you’ve seen in the preview image, users can apply different filters to their image like grayscale, inversion, saturation, and adjust the image brightness. Additionally, users can also rotate or flip the images and save their edited images.

Basic Image Editor in JavaScript [Source Codes]

To build an Image Editor using HTML CSS & JavaScript, you need to create three files: HTML, CSS & JavaScript file. Once you create these files, just paste the given codes into your file. If you don’t know how to create these files, where to paste the codes, or don’t want to do these, you can simply download the source code files of this Image Editor by clicking on the given download button that is at the bottom of this page.

First, paste the following codes into your index.html file.

<!DOCTYPE html>

<head>

<title>Image Editor in JavaScript | CodingNepal</title>

</head>

<body>

<h2>Easy Image Editor</h2>

<label class="title">Filters</label>

<button id="brightness" class="active">Brightness</button>

<button id="saturation">Saturation</button>

<button id="inversion">Inversion</button>

<button id="grayscale">Grayscale</button>

</div>

<p class="name">Brighteness</p>

</div>

</div>

<label class="title">Rotate & Flip</label>

</div>

</div>

<button class="reset-filter">Reset Filters</button>

<button class="choose-img">Choose Image</button>

<button class="save-img">Save Image</button>

</div>

</body>

</html>

<!DOCTYPE html>  <html lang="en" dir="ltr"> <head> <meta charset="utf-8"> <title>Image Editor in JavaScript | CodingNepal</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/boxicons@2.1.2/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>

Second, paste the following codes into your style.css file.

/* 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;

}

/* 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; } }

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());

That’s all, now you’ve successfully built a Basic Image Editor in HTML CSS & JavaScript. If your code doesn’t work or you’ve faced any problems, please download the source code files from the given download button. It is free and a zip file will be downloaded that contains project folder with source code files.

live demo

Download files

<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>Glassmorphism Login Form | CodingNepal</title> <link rel="stylesheet" href="style.css"> </head> <body> <div class="wrapper"> <form action="#"> <h2>Login</h2> <div class="input-field"> <input type="text" required> <label>Enter your email</label> </div> <div class="input-field"> <input type="password" required> <label>Enter your password</label> </div> <div class="forget"> <label for="remember"> <input type="checkbox" id="remember"> <p>Remember me</p> </label> <a href="#">Forgot password?</a> </div> <button type="submit">Log In</button> <div class="register"> <p>Don't have an account? <a href="#">Register</a></p> </div> </form> </div> </body> </html>

@import url("https://fonts.googleapis.com/css2?family=Open+Sans:wght@200;300;400;500;600;700&display=swap"); * { margin: 0; padding: 0; box-sizing: border-box; font-family: "Open Sans", sans-serif; } body { display: flex; align-items: center; justify-content: center; min-height: 100vh; width: 100%; padding: 0 10px; } body::before { content: ""; position: absolute; width: 100%; height: 100%; background: url("https://www.codingnepalweb.com/demos/create-glassmorphism-login-form-html-css/hero-bg.jpg"), #000; background-position: center; background-size: cover; } .wrapper { width: 400px; border-radius: 8px; padding: 30px; text-align: center; border: 1px solid rgba(255, 255, 255, 0.5); backdrop-filter: blur(9px); -webkit-backdrop-filter: blur(9px); } form { display: flex; flex-direction: column; } h2 { font-size: 2rem; margin-bottom: 20px; color: #fff; } .input-field { position: relative; border-bottom: 2px solid #ccc; margin: 15px 0; } .input-field label { position: absolute; top: 50%; left: 0; transform: translateY(-50%); color: #fff; font-size: 16px; pointer-events: none; transition: 0.15s ease; } .input-field input { width: 100%; height: 40px; background: transparent; border: none; outline: none; font-size: 16px; color: #fff; } .input-field input:focus~label, .input-field input:valid~label { font-size: 0.8rem; top: 10px; transform: translateY(-120%); } .forget { display: flex; align-items: center; justify-content: space-between; margin: 25px 0 35px 0; color: #fff; } #remember { accent-color: #fff; } .forget label { display: flex; align-items: center; } .forget label p { margin-left: 8px; } .wrapper a { color: #efefef; text-decoration: none; } .wrapper a:hover { text-decoration: underline; } button { background: #fff; color: #000; font-weight: 600; border: none; padding: 12px 20px; cursor: pointer; border-radius: 3px; font-size: 16px; border: 2px solid transparent; transition: 0.3s ease; } button:hover { color: #fff; border-color: #fff; background: rgba(255, 255, 255, 0.15); } .register { text-align: center; margin-top: 30px; color: #fff;}