이미지 압축기 (용량 줄이기)

차트분석 작성
작성일 2025.02.11 12:29

3,568 조회
목록

<!DOCTYPE html>
<html lang="ko">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>이미지 압축기</title>


<link href="bootstrap@5.3.0/dist/css/bootstrap.min.css"" TARGET="_blank" rel="nofollow">https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/css/bootstrap.min.css" rel="stylesheet">
<script src="bootstrap@5.3.0/dist/js/bootstrap.bundle.min.js"" TARGET="_blank" rel="nofollow">https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/js/bootstrap.bundle.min.js"></script>

<style>
body {
background-color: #f8f9fa;
padding: 30px;
}
.container {
max-width: 600px;
background: white;
padding: 20px;
border-radius: 10px;
box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
text-align: center;
}
.preview {
max-width: 100%;
margin-top: 10px;
border-radius: 5px;
}
.loader {
display: none;
margin: 20px auto;
}
</style>
</head>
<body>

<div class="container">
<h2 class="mb-3">이미지 압축기</h2>
<p class="text-muted">이미지를 업로드하면 압축하여 용량을 줄입니다.</p>

<input type="file" id="imageInput" class="form-control mb-3" accept="image/*">


<label for="qualityRange" class="form-label">압축 품질: <span id="qualityValue">80</span>%</label>
<input type="range" class="form-range" min="10" max="100" value="80" id="qualityRange" oninput="updateQualityValue()">

<button class="btn btn-primary w-100 mt-2" onclick="compressImage()"> 이미지 압축</button>


<div class="loader mt-3">
<div class="spinner-border text-primary" role="status">
<span class="visually-hidden">압축 중...</span>
</div>
<p class="mt-2">이미지 압축 중...</p>
</div>


<h5 class="mt-3"> 압축된 이미지 미리보기</h5>
<img id="previewImage" class="preview" style="display: none;">

<button id="downloadBtn" class="btn btn-success w-100 mt-3" style="display: none;" onclick="downloadCompressedImage()"> 다운로드</button>
</div>

<script>
let compressedBlob;

function updateQualityValue() {
document.getElementById("qualityValue").innerText = document.getElementById("qualityRange").value;
}

function compressImage() {
const fileInput = document.getElementById("imageInput");
const previewImage = document.getElementById("previewImage");
const loader = document.querySelector(".loader");
const downloadBtn = document.getElementById("downloadBtn");

if (fileInput.files.length === 0) {
alert("이미지를 업로드하세요.");
return;
}

const file = fileInput.files[0];
const reader = new FileReader();

loader.style.display = "block";
previewImage.style.display = "none";
downloadBtn.style.display = "none";

reader.onload = function (event) {
const img = new Image();
img.src = event.target.result;

img.onload = function () {
const canvas = document.createElement("canvas");
const ctx = canvas.getContext("2d");

// 원본 크기 유지
canvas.width = img.width;
canvas.height = img.height;

// 캔버스에 이미지 그리기
ctx.drawImage(img, 0, 0, canvas.width, canvas.height);

// 압축 품질 설정
const quality = document.getElementById("qualityRange").value / 100;

// 이미지 압축 및 Blob 생성
canvas.toBlob((blob) => {
compressedBlob = blob;
const compressedURL = URL.createObjectURL(blob);

// 미리보기 표시
previewImage.src = compressedURL;
previewImage.style.display = "block";

// 다운로드 버튼 활성화
downloadBtn.style.display = "block";

loader.style.display = "none";
}, "image/jpeg", quality);
};
};

reader.readAsDataURL(file);
}

function downloadCompressedImage() {
if (!compressedBlob) {
alert("압축된 이미지가 없습니다.");
return;
}

const a = document.createElement("a");
a.href = URL.createObjectURL(compressedBlob);
a.download = "compressed_image.jpg";
document.body.appendChild(a);
a.click();
document.body.removeChild(a);
}
</script>

</body>
</html>