PDF Merger Online [2026] — Merge Contracts/Scans in 4 Clicks (No Upload)

1. 12 Real Use Cases (Stop Solving Problems You Don't Have)

1. Visa application: merge Passport photo page + Bank 3-month statement + Employment letter + Flight itinerary + Hotel booking into ONE 30-page PDF. Consulates reject 8 separate PDFs as 'incomplete package'.
2. Tax filing (IRS 1040 / HMRC Self Assessment / China Individual Income Tax): merge W2/1099/P60/P45 + rental income statements + charitable donation receipts + medical bills into ONE indexed PDF so your CPA opens exactly 1 file.
3. B2B NDA/contract signing: cover page + 18 body pages + signature page + 3 annexes. Merging BEFORE sending prevents the classic: 'I don't see Annex 2 attached' email loop.
4. Salary slip year-end: merge 12 monthly payslip PDFs into one file so HR / bank loan officer can page-down instead of clicking 12 attachments.
5. University thesis submission: Abstract + Declaration + Chapters 1–5 + References + Appendices A–D. Merge and add bookmarks so examiners jump to specific section.
6. Real estate purchase: sale agreement + property registry extract + bank loan sanction letter + ID proofs. Merge into chronological single PDF for notary.
7. Freelancer client portfolio: 6 case studies + 3 recommendation letters. Combine into 1 PDF so you attach a single link in Upwork proposal.
8. Hospital medical records: scan discharge summary + 3 lab reports + X-ray/CT scan PDFs. Merge in date order for the second-opinion doctor.
9. Invoices for accountant: 25 expense PDFs (Ubers/flights/meals/supplies) merged sorted by date. Your accountant thanks you and bills 30% less hours.
10. Rental application: merge ID + credit report + 2 landlord references + employment letter + 3 months payslips. Property managers open 1 file and shortlist you first.
11. Digital product e-book: 4 chapters written separately by 4 writers. Merge into final version with clickable TOC (Korelyy preserves internal links if PDFs already have them).
12. School admission: birth certificate + immunization record + previous school report cards + parent ID. Merge so admissions clerk clicks once.

2. The 4-Step Korelyy PDF Merge Workflow (Even Your Boss Can Do It)

1. Open Korelyy → PDF Merger. Drag-drop all 8 PDFs from your folder. Multi-select also works with Ctrl+A or Shift.
2. Reorder pages: drag each file card vertically. Or click individual page numbers to split a multi-page PDF and ONLY merge pages 3–7 of file #2.
3. Toggle 'Auto-detect and remove blank pages' for scanned documents (typical 8-page scan = 2 blank pages from ADF double-feed). Saves 20-30% file size.
4. Click 'Merge into One PDF' → downloads merged file with your chosen name, timestamp, and zero watermark. 0 bytes uploaded anywhere.

2.1 2026 Privacy Mandates: Why 'Upload to Server' PDF Mergers Are Now Illegal for Contracts

Before you merge your next NDA on a random free site: EU GDPR Art. 32 now requires processor-bound encryption for personal data. If an Indian property-owner uploads Aadhaar + sale contract PDF to a Spanish 'free merger' server, the processor (Spain) and controller (India) both face DPA fines up to 4% global revenue. China PIPL similar for 个人信息. US HIPAA patients: merge medical records on a server-hosted tool → provider loses HIPAA Safe Harbor. Korelyy PDF Merger runs 100% on-device via pdf-lib WebAssembly — you can confirm by turning off Wi-Fi mid-merge and it still finishes. No compliance risk whatsoever.