Merge PDF – Combine PDF Files Online Free
Merge multiple PDF files into one document online. Drag to reorder pages. Free, no upload required — runs entirely in your browser.
Click to upload or drag & drop
PDF files · Multiple files supported
Frequently Asked Questions
There is no hard limit. You can merge as many PDFs as you like, though very large files may use significant browser memory.
Yes. Drag and drop the PDF rows to set the order. The merged PDF will contain pages in the order shown.
The tool preserves page content and basic structure. Complex features like bookmarks, form fields, and interactive elements may not be fully preserved in the merged output.
There is no enforced limit, but very large PDFs (hundreds of MB) may be slow to process in the browser. For best performance, keep individual files under 50MB.
No. All merging is done client-side using the pdf-lib library. Your files never leave your device.
What is Merge PDF – Combine PDF Files Online Free?
A PDF merger combines two or more PDF files into a single document. This is useful for combining reports, contracts, invoices, or any collection of PDF documents into one file for easy sharing and archiving. Our PDF Merger uses pdf-lib running entirely in your browser — your files are never uploaded to any server. You can drag and drop to reorder the files before merging.
How to Use Merge PDF – Combine PDF Files Online Free
- 1Upload two or more PDF files by clicking the upload area or dragging them onto the tool.
- 2Drag the files to reorder them in the desired sequence.
- 3Click Merge to combine all files into a single PDF.
- 4Download the merged PDF with one click.
Key Features
- ✓Merge unlimited PDF files into one document
- ✓Drag-and-drop reordering before merging
- ✓Preserves original page quality and formatting
- ✓Runs entirely in your browser using pdf-lib
Benefits
- →Combine multiple reports into a single document
- →Merge scanned pages into one PDF
- →Organize contracts and invoices into one file
- →Keep documents private — no server upload
Why Use Irreva for Merge PDF – Combine PDF Files Online Free?
Frequently Asked Questions
How many PDFs can I merge at once?
There is no limit on the number of PDFs you can merge. However, merging very large files may be slow depending on your device's memory.
Can I reorder the files before merging?
Yes. Drag and drop the uploaded files to arrange them in the order you want before clicking Merge.
Do my PDF files get uploaded anywhere?
No. pdf-lib handles all merging locally inside your browser. The merged document is assembled in memory on your device, then downloaded directly — no cloud storage involved.
Does merging reduce PDF quality?
No. The tool preserves the original quality of all pages from all input PDFs.
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