Merge PDF Files
Into One Document
Combine multiple PDF files into a single document. Drag to reorder pages, then merge instantly. Free, fast, and completely private.
Drop PDF files here
or click to browse · select multiple files
What Is PDF Merging?
PDF merging is the process of combining two or more separate PDF files into a single, unified document. Instead of sending multiple attachments or juggling several files, you can join them into one PDF that is easier to share, print, and archive. Our online PDF merger handles the entire process on your device — your files are never sent anywhere.
The tool preserves the original page sizes, orientations, and content of each source file. You can drag to reorder the files before merging, so the pages appear in exactly the sequence you need. Whether you are combining invoices, reports, scanned documents, or presentation slides, the output is a single, clean PDF ready for immediate use.
Unlike desktop software that requires installation and often a paid license, our online merger works on any device — Windows, Mac, Linux, Chromebook, or even a tablet. There is nothing to download, no account to create, and no limit on the number of files you can merge.
The merge engine copies pages directly from source documents without re-rendering or re-compressing them. This means every page in the output retains 100% of the original quality — fonts, images, vectors, and annotations are all preserved exactly as they were.
Discover Features of Our PDF Merging Tool
Effortless PDF file management with a secure, fast, and intuitive merging experience
Combine Multiple PDF Files
Select any number of PDF documents and merge them into a single, unified file in seconds. Whether you have 2 invoices or 50 scanned pages, the tool handles them all in one batch without breaking a sweat. Each source file's pages are appended sequentially so nothing is lost.
Secure & Private Merging
All the PDF files you add are processed entirely on your device. Your sensitive documents — contracts, financial statements, medical records — remain completely private. Once you're done, everything is gone.
Drag & Drop Reordering
After adding your PDF files, use the intuitive up and down controls to rearrange them in the exact order you need. The merged output will follow your custom sequence, giving you full control over the final document's page flow without any manual page extraction.
Preview File Details
Before merging, you can see each file's name and size displayed in a clean list. This lets you verify you've added the right files and spot any duplicates or missing documents before committing to the merge operation.
Instant Processing
The merging engine copies pages directly from source documents without re-rendering. This means merges happen in milliseconds to seconds even for large collections, with zero quality loss since no re-compression occurs.
Works on Any Device
No software installation required. The PDF merger works on Windows, macOS, Linux, Chromebooks, tablets, and smartphones. Just open the page, add your files, and merge — it's that simple, regardless of your operating system.
Steps to Combine Multiple PDFs into One
Merge or combine PDFs with ease and efficiency by following the steps below
Add Your PDF Files
Drag and drop multiple PDF documents into the upload zone, or click to browse your device. You can add as many files as you need — there is no file count limit.
Arrange the Order
Use the arrow buttons to move files up or down in the list. The final merged document will follow this exact sequence, so put your cover page first and appendices last.
Click Merge
Press the Merge button and the tool combines all pages from every file into one PDF. Processing happens right on your device — fast, private, and secure.
Download Your Merged PDF
The combined document downloads automatically as "merged.pdf." Your original files are untouched — you get a brand-new single PDF alongside them.
Free vs Paid — Merge PDF
Get started free, upgrade when you need more power.
Unlock the Full Power of Merge PDF
Remove daily limits, process larger files up to 500 MB, enable batch processing, and get priority support.
PDF Tools includes:
- 21 PDF tools included
- Unlimited daily uses
- 100 MB file size limit
- Batch processing
- Sign, Redact, OCR, Watermark
- All export formats
Also available in the All Tools Bundle
Our Users' Questions & Reviews
Verified questions from real users and expert answers from the OnlinePCTools team
“I run a small business and every month I need to combine 15–20 invoices into a single PDF before sending them to my accountant. Can I add that many files at once?”
Jane Morris
Small Business Owner, Dubai, UAE
Absolutely. There is no limit on the number of PDFs you can add. Simply drag all 15–20 invoice files into the upload area, arrange them in chronological order using the arrow buttons, and hit Merge. The tool will produce a single PDF containing every page from every invoice, ready to send to your accountant in seconds.
— OnlinePCTools Team
“I'm a student and I need to combine my cover letter, resume, transcript, and two recommendation letters into one file for a university application portal that only accepts a single PDF upload.”
Priya Kapoor
Graduate Student, Mumbai, India
This is exactly what the tool is designed for. Add each document as a separate PDF, then use the reorder controls to put them in the sequence the university expects — typically cover letter first, then resume, transcript, and recommendation letters. Click Merge and you'll get one clean PDF that meets the portal's single-file requirement.
— OnlinePCTools Team
“I have a 300-page scanned document split across 6 PDF files (about 50 pages each). Will the tool handle that without crashing or losing quality?”
Marco Bianchi
Legal Consultant, Milan, Italy
Yes. The merge engine copies pages directly from the source files without re-rendering or compressing them, so there is zero quality loss regardless of file size. A 300-page merge typically completes in just a few seconds. Just keep the page open while it processes. If your device has limited memory, consider merging in two rounds — combine 3 files first, then merge that result with the remaining 3.
— OnlinePCTools Team
“Are my documents safe? I need to merge confidential contracts and I don't want them stored on any server.”
David Chen
Software Developer, Toronto, Canada
Your documents are completely safe. The entire merge process happens on your device — no file is ever sent anywhere. We have no external processing, no file storage, and no analytics that touch your document content. Once you're done, nothing remains. Your data stays completely safe and private.
— OnlinePCTools Team
Who Needs a PDF Merger?
Common scenarios where combining PDFs saves time and simplifies your workflow
Invoice & Receipt Bundling
Combine monthly invoices, expense receipts, or purchase orders into one PDF for accounting, tax filing, or reimbursement submissions. No more emailing 20 attachments.
Academic Submissions
Merge cover pages, research papers, reference lists, and appendices into a single submission file for journals, conferences, or university portals that accept only one PDF.
Legal Document Packages
Assemble contracts, exhibits, affidavits, and signature pages into a complete legal package for filing, review, or e-signature workflows.
Scanned Document Assembly
Join individually scanned pages — each saved as a separate PDF — into one multi-page document for archiving, sharing, or OCR processing.
Report Compilation
Merge cover pages, executive summaries, charts, data tables, and appendices into a polished, unified report ready for stakeholders and board meetings.
E-book & Manual Creation
Combine chapters, illustrations, and a table of contents into a complete digital book or product manual. Perfect for self-publishers and technical writers.
Frequently Asked Questions
Some common queries and their answers about the PDF Merge Tool
Q1. How do I combine multiple PDFs into one PDF?
Q2. Is there a limit on how many PDFs I can merge?
Q3. Are my files uploaded to a server?
Q4. Will the merged PDF lose quality?
Q5. Can I merge password-protected PDF files?
Q6. Does this tool support corrupt PDF files?
Q7. Can I reorder individual pages from different PDFs?
Q8. Is the tool free?
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