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PDF Merge/Split Tool

Merge multiple PDFs into one or split PDF into desired pages.

📄 PDF 도구

PDF 파일을 병합하거나 분할하세요

📌 사용 안내

  • 2개 이상의 PDF 파일을 선택하세요
  • 파일 순서를 변경할 수 있습니다 (▲▼ 버튼)
  • 병합된 PDF는 자동으로 다운로드됩니다
  • 브라우저에서 직접 처리되어 안전합니다

⚠️ 주의사항

  • 모든 처리는 브라우저에서 이루어지며 서버로 전송되지 않습니다
  • 큰 파일은 처리 시간이 오래 걸릴 수 있습니다
  • 암호화된 PDF는 지원하지 않습니다
  • 처리가 완료되면 자동으로 다운로드됩니다

Key Features​

  • 🔗 PDF Merge: Combine multiple PDFs into one
  • ✂️ PDF Split: Divide by pages
  • 📁 File Order Change (When merging)
  • 🔢 Page Range Specification (When splitting)
  • 💾 Automatic Download
  • 🔒 Browser Processing (No server upload)
  • 🚀 Fast Processing Speed

PDF Merge​

📖 What is Merge?​

Combining multiple PDF files
into one PDF

Example:
file1.pdf (3 pages) +
file2.pdf (2 pages) +
file3.pdf (4 pages)
= merged.pdf (9 pages)

🔄 How to Use​

1️⃣ Select Files​

1. Select "🔗 PDF Merge" mode
2. Click "Select PDF Files"
3. Select 2 or more PDFs
4. Or add one by one

2️⃣ Adjust Order​

✓ ▲ button: Move up
✓ ▼ button: Move down
✓ ✕ button: Delete file
✓ 🗑️ Clear All: Remove all

3️⃣ Execute Merge​

1. Click "🔗 Merge PDFs"
2. "Processing..." display
3. Automatic download
4. merged.pdf saved

💡 Merge Use Cases​

✓ Combine multiple documents
✓ Integrate contract attachments
✓ Merge reports
✓ Organize scanned files
✓ Resume + Portfolio
✓ Invoice collection

PDF Split​

📖 What is Split?​

Dividing one PDF file
into multiple PDFs

Example:
document.pdf (10 pages)
→ split-1.pdf (pages 1-3)
→ split-2.pdf (page 5)
→ split-3.pdf (pages 7-9)

🔄 How to Use​

1️⃣ Select File​

1. Select "✂️ PDF Split" mode
2. Click "Select PDF File"
3. Select 1 PDF

2️⃣ Enter Page Range​

Format: Use numbers, hyphens, commas

Example 1: 1-3,5,7-9
→ split-1.pdf: pages 1-3
→ split-2.pdf: page 5
→ split-3.pdf: pages 7-9

Example 2: 1-5
→ split-1.pdf: pages 1-5

Example 3: 2,4,6
→ split-1.pdf: page 2
→ split-2.pdf: page 4
→ split-3.pdf: page 6

3️⃣ Execute Split​

1. Click "✂️ Split PDF"
2. "Processing..." display
3. Multiple files auto download
4. split-1.pdf, split-2.pdf...

💡 Split Use Cases​

✓ Extract only needed pages
✓ Divide by chapters
✓ Separate personal info pages
✓ Divide large files
✓ Extract specific sections
✓ Separate for printing

Page Range Syntax​

📝 Basic Rules​

Number: Single page
  Ex: 5 → page 5 only

Range: start-end
  Ex: 1-5 → pages 1,2,3,4,5

Comma: Separate multiple ranges
  Ex: 1-3,5,7-9

📋 Examples​

Example 1: Split into 3 groups​

Input: 1-3,4-6,7-9

Result:
split-1.pdf: pages 1,2,3
split-2.pdf: pages 4,5,6
split-3.pdf: pages 7,8,9

Example 2: First page only​

Input: 1

Result:
split-1.pdf: page 1 only

Example 3: Odd pages only​

Input: 1,3,5,7,9

Result:
split-1.pdf: page 1
split-2.pdf: page 3
split-3.pdf: page 5
split-4.pdf: page 7
split-5.pdf: page 9

Example 4: Front and back separation​

Input: 1-5,6-10

Result:
split-1.pdf: front part (1-5)
split-2.pdf: back part (6-10)

⚠️ Notes​

✓ Page numbers start from 1
✓ Exceeding total pages are ignored
✓ Invalid formats are skipped
✓ Spaces are auto removed

Technical Features​

🔒 Security​

✅ Browser processing
✅ No server upload
✅ No file transmission
✅ Personal info safe
✅ Local processing

⚡ Performance​

✓ Client-side processing
✓ Uses pdf-lib library
✓ Fast processing speed
✓ Real-time feedback

💾 File Processing​

JavaScript FileReader API
Convert to ArrayBuffer
PDF parsing and manipulation
Blob creation and download

Tips​

💡 Tip 1: File Size​

Small files: Instant processing
Medium files (< 10MB): Fast
Large files (> 10MB): Takes time
Very large files: Browser may slow down

💡 Tip 2: Merge Order​

✓ Think about order in advance
✓ Distinguish by filename
✓ Adjust with ▲▼ buttons
✓ Delete and re-add if wrong

💡 Tip 3: Split Plan​

✓ Check total pages first
✓ Write range in notepad
✓ Test with 1-2 first
✓ Split all after confirmation

💡 Tip 4: Filenames​

Merge: merged.pdf
Split: split-1.pdf, split-2.pdf...

Recommend renaming after download

💡 Tip 5: Error Handling​

✓ Encrypted PDF: Not supported
✓ Corrupted PDF: Error occurs
✓ Browser slow: Refresh
✓ If fails: Check file and retry

Limitations​

⚠️ Unsupported Features​

❌ Encrypted PDFs
❌ Protected PDFs
❌ Corrupted PDFs
❌ Scanned image OCR
❌ Page rotation
❌ Watermark addition
❌ PDF editing

⚠️ File Size​

Browser memory limits:
- Chrome: ~2GB
- Firefox: ~2GB
- Safari: ~1GB

Recommended:
✅ Under 50MB per file
✅ Under 100MB total

⚠️ Browser Compatibility​

✅ Chrome (recommended)
✅ Firefox
✅ Edge
✅ Safari
❌ IE (not supported)

FAQ​

Q: Are files sent to the server?​

A: No, all processing is done in the browser. Not sent to server.

Q: Can I merge encrypted PDFs?​

A: No, encrypted or protected PDFs are not supported.

Q: How many PDFs can I merge?​

A: No limit, but depends on file size and browser performance.

Q: Does page order change when splitting?​

A: No, maintains original order.

Q: Can image PDFs be merged?​

A: Yes, scanned image PDFs can also be merged/split.

Q: Processing is slow​

A: File size may be large. Try testing with smaller files.

Conclusion​

Process document work efficiently with PDF Merge/Split tool. Use safely in your browser!

"Good tools make work easy. PDF work is now easy too."