Is this PDF merger free?

Yes, absolutely free with no hidden costs, subscriptions, or watermarks. All processing happens locally in your browser — there are no server costs, so we'll never charge for this tool. Merge as many PDFs as you need, as often as you want.

Your files never leave your device. All PDF merging is done locally in your browser using client-side JavaScript. No data is uploaded to any server. This privacy-by-design approach ensures your documents remain completely confidential.

Can I merge password-protected PDFs?

Currently, the tool does not support password-protected PDFs. Please remove the password protection first using our Unlock PDF tool, then merge the files.

Is there a file size limit?

Since all processing happens locally in your browser, the practical limit depends on your device's available memory. Each individual file is capped at 100 MB for optimal performance. Most files under 100 MB work smoothly.

Can I select specific pages to merge?

Yes! For each uploaded PDF, you can specify exactly which pages to include. Use formats like "1-3,5,7-9" to select specific pages, or keep "all" to include every page from that file.

Does it work on mobile?

Yes, the tool is fully responsive and works on smartphones and tablets. You can upload files from your device's storage, drag to reorder, and download the merged PDF directly.

How many PDFs can I merge at once?

You can merge up to 20 PDF files in a single operation. Since everything runs locally on your machine, the limit is based on your browser's memory capacity.

Will my files be deleted automatically?

Since files are processed entirely in your browser, nothing is ever stored on our servers. The files remain only in your browser's memory and are cleared when you close the page or click 'Clear All'.

What page range formats are supported?

The page range input supports flexible formats: use "all" to include every page, specify individual pages with commas like "1,3,5", define ranges with hyphens like "1-10", or combine them like "1-3,5,7-9". Invalid page numbers are automatically ignored.

Can I reorder files after uploading?

Yes, you can reorder files using drag and drop via the grip handle on the left side of each file entry. You can also use the up and down arrow buttons for precise reordering. The merge order follows the displayed file order from top to bottom.

Is there a limit on the number of pages in the merged output?

There is no hard limit on the total number of pages in the merged PDF. However, since everything runs in your browser, very large documents with thousands of pages may consume significant memory and processing time. For most practical use cases involving documents up to several hundred pages, performance is excellent.

Can I merge PDFs from different sources, like scanned documents and digital PDFs?

Yes, you can mix any PDF files regardless of their origin. The tool handles both digitally created PDFs and scanned documents. As long as each file is a valid PDF, our merger can combine them into a single unified document regardless of their source or creation method.

What happens to my files after I close the browser tab?

Since all processing happens locally in your browser's memory, files are automatically cleared when you close the tab or navigate away. There is no server-side storage, cache, or backup of your documents. For your records, make sure to download your merged PDF before leaving the page.

Does the tool preserve bookmarks and hyperlinks from the original PDFs?

The merger preserves the core content and structure of your PDF pages, including text, images, and formatting. However, interactive elements like bookmarks, internal hyperlinks, and form fields may not be preserved in the merged output. We recommend checking your merged document for critical interactive features.

How does PDF page tree structure affect merging?

PDF pages form a hierarchical tree (ISO 32000 7.7.3) with intermediate Pages nodes. Merging deep-clones Page objects from each source into a new tree, preserving content but potentially losing document-level links and outlines.

What happens to PDF version compatibility during merge?

Different source PDF versions (1.4 through 2.0) are normalized to pdf-lib output version. Features specific to PDF 2.0 (ISO 32000-2:2020) like mandatory AES-256 encryption may not be preserved.

PDF 병합

PDF 도구

여러 PDF 파일을 페이지 선택 및 미리보기와 함께 하나의 문서로 쉽게 결합하세요.

PDF 병합 소개

A free, privacy-first online tool to merge multiple PDF files into one document directly in your browser with page selection and drag-and-drop reordering.

Merge unlimited PDF files — 100% free with no watermarks or signups. Select specific pages from each PDF using flexible page range syntax. Drag-and-drop reordering with smooth animations and live preview. Thumbnail previews for every uploaded file — see what you're merging.

업로드 0% · 브라우저 로컬 처리 · 기기에 데이터 유지

Rate this tool

Drop PDF files here

or click to browse files — supports multiple PDF selection

Files are processed locally — nothing is uploaded

Secure Processing

Files never leave your device

Instant Results

No waiting or processing queues

Local Merging

100% browser-based

No Watermark

Free & unlimited

사용 방법

1
Upload two or more PDF files by dragging them into the upload area or clicking to browse your device.
2
Arrange the files in your desired order by dragging them. You can also reorder individual pages if needed.
3
Configure advanced options like page selection, compression, or password protection as needed.
4
Click 'Merge PDFs' to combine all files into one document — processing happens entirely in your browser.
5
Download your merged PDF, preview it, or rename it before saving to your device.
6
Pro Tip: Use "Show Preview" after merging to verify page order. You can also rename the output file before downloading.

기능

Merge unlimited PDF files — 100% free with no watermarks or signups

Select specific pages from each PDF using flexible page range syntax

Drag-and-drop reordering with smooth animations and live preview

Thumbnail previews for every uploaded file — see what you're merging

Advanced options: compress output, preserve bookmarks, smart optimize

All processing happens in your browser — zero server uploads, maximum privacy

Supports files up to 100 MB each, up to 20 files per merge session

Fully responsive — works on desktop, tablet, and mobile devices

Live thumbnail previews for every uploaded PDF file

기술

pdf-lib을 사용한 문서 조작(병합, 분할, 회전, 암호화)과 pdfjs-dist(Mozilla의 PDF.js)를 사용한 렌더링 및 텍스트 추출 – 모두 브라우저 내에서, 서버 업로드 제로.

pdf-libpdfjs-dist클라이언트 측업로드 제로

PDF 병합을 사용해야 하는 이유

100% 무료 & 회원가입 불필요

계정 생성, 구독 또는 무료 체험 후 사용 제한이 필요한 많은 온라인 도구와 달리 PDF 병합은 회원가입 없이 완전히 무료입니다. 제한이나 숨은 요금 없이 필요할 때마다 사용하세요. 보완 기능이 필요한 경우 PDF 분할 도구를 확인해보세요.

설계 기반 프라이버시

파일이 기기를 떠나지 않습니다. 모든 처리는 클라이언트 측 JavaScript를 사용하여 브라우저에서 로컬로 이루어지며 서버로의 데이터 전송이 전혀 없습니다. 이 프라이버시 우선 아키텍처는 민감한 문서의 완전한 기밀성을 보장합니다. 유사한 프라이버시 중심 처리가 필요하다면 PDF 압축에 대해 알아보세요.

워터마크나 광고 없음

많은 무료 온라인 도구는 출력 파일에 워터마크를 추가하거나 방해가 되는 광고를 표시합니다. PDF 병합은 방해 없이 깨끗하고 워터마크 없는 결과물을 제공합니다. 미니멀한 인터페이스로 작업에 집중할 수 있습니다.

모든 기기에서 작동

데스크톱, 노트북, 태블릿 또는 스마트폰 등 어떤 기기를 사용하든 PDF 병합은 완전히 반응형으로 모든 기기와 화면 크기에서 원활하게 작동합니다. 앱 설치 불필요 – 브라우저를 열고 즉시 도구를 사용하세요. 더 많은 유틸리티를 위해 전체 도구 컬렉션을 살펴보세요.

자주 묻는 질문

1. Upload two or more PDF files by dragging them into the upload area or clicking to browse your device. 2. Arrange the files in your desired order by dragging them. You can also reorder individual pages if needed. 3. Configure advanced options like page selection, compression, or password protection as needed. 4. Click 'Merge PDFs' to combine all files into one document — processing happens entirely in your browser. 5. Download your merged PDF, preview it, or rename it before saving to your device. 6. Pro Tip: Use "Show Preview" after merging to verify page order. You can also rename the output file before downloading.

더 많은 PDF 도구 도구

FreeAIBox의 PDF 도구은(는) 위의 관련 도구 외에도 다양한 옵션을 포함합니다. 문서, 이미지 또는 데이터 처리 작업에 필요한 도구를 추가로 살펴보세요.

PDF → 이미지

PDF 페이지를 JPG 또는 PNG 이미지로 변환하세요.

PDF 도구도구 사용

페

신규

페이지 번호 추가

PDF 문서에 페이지 번호를 추가하세요.

PDF 도구도구 사용

PDF 회전

PDF 페이지를 왼쪽이나 오른쪽으로 쉽게 회전하세요.

PDF 도구도구 사용

모든 PDF 도구 둘러보기

도구 카테고리 살펴보기

FreeAIBox은 9개 카테고리에 걸쳐 무료 도구를 제공합니다. 다른 카테고리를 둘러보며 워크플로우를 보완하고 플랫폼을 전환하지 않고도 더 많은 작업을 수행할 수 있는 추가 도구를 찾아보세요.

이미지 도구 텍스트 도구 학생 도구 채용 및 프리랜싱 개발자 도구 계산기 QR 도구 비즈니스 도구

개인정보 보호 및 보안

PDF 병합은 FreeAIBox이 제공하는 무료 온라인 도구입니다. 파일이 기기를 떠나지 않습니다 – 모든 처리가 서버 업로드 없이 브라우저에서 로컬로 이루어집니다. 문서를 원격 서버로 전송하는 클라우드 기반 경쟁사와 달리 이 도구는 로컬 컴퓨팅을 사용하여 기기에서 완전히 실행되므로 완벽한 데이터 프라이버시와 보안을 보장합니다.

이 아키텍처는 GDPR, HIPAA 및 승인되지 않은 클라우드 서비스에 민감한 문서 업로드를 금지하는 기업 IT 정책을 포함한 엄격한 데이터 규정 준수 요구사항이 있는 엔터프라이즈 환경에 FreeAIBox을 이상적으로 만듭니다. 기기에서 데이터가 나가지 않으며 BAA가 필요 없고 국경 간 데이터 전송 문제도 없습니다.

브라우저 기반 처리 및 웹 표준에 대한 자세한 내용은 MDN Web Docs, web.dev 또는 W3C HTML Specification을 방문하세요.

도구 로딩 중...

PDF 병합 소개

A free, privacy-first online tool to merge multiple PDF files into one document directly in your browser with page selection and drag-and-drop reordering.

사용 방법

Upload two or more PDF files by dragging them into the upload area or clicking to browse your device.

Arrange the files in your desired order by dragging them. You can also reorder individual pages if needed.

Configure advanced options like page selection, compression, or password protection as needed.

Click 'Merge PDFs' to combine all files into one document — processing happens entirely in your browser.

Download your merged PDF, preview it, or rename it before saving to your device.

Pro Tip: Use "Show Preview" after merging to verify page order. You can also rename the output file before downloading.