Node.js 사용하여 PDF 파일을 압축하는 방법

//:path=/static-assets/pdf/content-code-examples/how-to/nodejs-compress-pdf/quickstart.js
import { PdfDocument } from "@ironsoftware/ironpdf";

// 기존 PDF 로드
const pdf = await PdfDocument.fromFile("report.pdf");

// 내장된 이미지를 60% JPEG 품질로 압축
await pdf.compressSize(60);

// 결과를 저장
await pdf.saveAs("report-compressed.pdf");

//:path=/static-assets/pdf/content-code-examples/how-to/nodejs-compress-pdf/quickstart.js
import { PdfDocument } from "@ironsoftware/ironpdf";

// 기존 PDF 로드
const pdf = await PdfDocument.fromFile("report.pdf");

// 내장된 이미지를 60% JPEG 품질로 압축
await pdf.compressSize(60);

// 결과를 저장
await pdf.saveAs("report-compressed.pdf");

//:path=/static-assets/pdf/content-code-examples/how-to/nodejs-compress-pdf/compress-with-scaling.js
import { PdfDocument } from "@ironsoftware/ironpdf";

// 원본 문서 로드
const pdf = await PdfDocument.fromFile("product-catalog.pdf");

// 이미지를 90% 품질로 압축하고 보이는 크기로 축소하십시오
await pdf.compressSize(90, true);

// 최적화된 문서 저장
await pdf.saveAs("product-catalog-optimized.pdf");

//:path=/static-assets/pdf/content-code-examples/how-to/nodejs-compress-pdf/compress-with-scaling.js
import { PdfDocument } from "@ironsoftware/ironpdf";

// 원본 문서 로드
const pdf = await PdfDocument.fromFile("product-catalog.pdf");

// 이미지를 90% 품질로 압축하고 보이는 크기로 축소하십시오
await pdf.compressSize(90, true);

// 최적화된 문서 저장
await pdf.saveAs("product-catalog-optimized.pdf");

//:path=/static-assets/pdf/content-code-examples/how-to/nodejs-compress-pdf/measure-compression.js
import { PdfDocument } from "@ironsoftware/ironpdf";
import { statSync } from "fs";

const inputPath = "annual-report.pdf";
const outputPath = "annual-report-compressed.pdf";

const beforeBytes = statSync(inputPath).size;

const pdf = await PdfDocument.fromFile(inputPath);
await pdf.compressSize(75);
await pdf.saveAs(outputPath);

const afterBytes = statSync(outputPath).size;
const reduction = (((beforeBytes - afterBytes) / beforeBytes) * 100).toFixed(1);

console.log(`Before: ${(beforeBytes / 1024).toFixed(1)} KB`);
console.log(`After:  ${(afterBytes / 1024).toFixed(1)} KB`);
console.log(`Reduced by ${reduction}%`);

//:path=/static-assets/pdf/content-code-examples/how-to/nodejs-compress-pdf/measure-compression.js
import { PdfDocument } from "@ironsoftware/ironpdf";
import { statSync } from "fs";

const inputPath = "annual-report.pdf";
const outputPath = "annual-report-compressed.pdf";

const beforeBytes = statSync(inputPath).size;

const pdf = await PdfDocument.fromFile(inputPath);
await pdf.compressSize(75);
await pdf.saveAs(outputPath);

const afterBytes = statSync(outputPath).size;
const reduction = (((beforeBytes - afterBytes) / beforeBytes) * 100).toFixed(1);

console.log(`Before: ${(beforeBytes / 1024).toFixed(1)} KB`);
console.log(`After:  ${(afterBytes / 1024).toFixed(1)} KB`);
console.log(`Reduced by ${reduction}%`);

//:path=/static-assets/pdf/content-code-examples/how-to/nodejs-compress-pdf/batch-compress.js
import { PdfDocument } from "@ironsoftware/ironpdf";
import path from "path";

async function compressPdfFiles(inputPaths, quality = 80) {
const results = await Promise.all(
inputPaths.map(async (inputPath) => {
const pdf = await PdfDocument.fromFile(inputPath);
await pdf.compressSize(quality);

const outputPath = inputPath.replace(".pdf", "-compressed.pdf");
await pdf.saveAs(outputPath);

return { input: inputPath, output: outputPath };
})
);

return results;
}

// 사용
const files = ["report-q1.pdf", "report-q2.pdf", "report-q3.pdf"];
const compressed = await compressPdfFiles(files, 75);
compressed.forEach(r => console.log(`Saved: ${r.output}`));

//:path=/static-assets/pdf/content-code-examples/how-to/nodejs-compress-pdf/batch-compress.js
import { PdfDocument } from "@ironsoftware/ironpdf";
import path from "path";

async function compressPdfFiles(inputPaths, quality = 80) {
const results = await Promise.all(
inputPaths.map(async (inputPath) => {
const pdf = await PdfDocument.fromFile(inputPath);
await pdf.compressSize(quality);

const outputPath = inputPath.replace(".pdf", "-compressed.pdf");
await pdf.saveAs(outputPath);

return { input: inputPath, output: outputPath };
})
);

return results;
}

// 사용
const files = ["report-q1.pdf", "report-q2.pdf", "report-q3.pdf"];
const compressed = await compressPdfFiles(files, 75);
compressed.forEach(r => console.log(`Saved: ${r.output}`));

//:path=/static-assets/pdf/content-code-examples/how-to/nodejs-compress-pdf/compress-after-render.js
import { PdfDocument, ChromePdfRenderer } from "@ironsoftware/ironpdf";

// HTML을 PDF로 렌더링
const renderer = new ChromePdfRenderer();
const pdf = await renderer.renderHtmlAsPdf("<h1>인보이스 #1042</h1><p>지불할 금액: $540.00</p>");

// 저장하기 전에 압축 -- Chrome에서 렌더링된 콘텐츠의 이미지 무게를 줄입니다
await pdf.compressSize(85);

// 최종 문서를 저장
await pdf.saveAs("invoice-1042.pdf");

//:path=/static-assets/pdf/content-code-examples/how-to/nodejs-compress-pdf/compress-after-render.js
import { PdfDocument, ChromePdfRenderer } from "@ironsoftware/ironpdf";

// HTML을 PDF로 렌더링
const renderer = new ChromePdfRenderer();
const pdf = await renderer.renderHtmlAsPdf("<h1>인보이스 #1042</h1><p>지불할 금액: $540.00</p>");

// 저장하기 전에 압축 -- Chrome에서 렌더링된 콘텐츠의 이미지 무게를 줄입니다
await pdf.compressSize(85);

// 최종 문서를 저장
await pdf.saveAs("invoice-1042.pdf");