Merge PDF

Combine multiple PDF files into one — drag to reorder, then download instantly.

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Add multiple PDFs — drag to reorder

Output filename:

.pdf

PDFs merged successfully!

All processing is done locally in your browser — your files are never uploaded.

How It Works

Upload two or more PDF files, drag them into your preferred order, name the output file, and click Merge. The combined PDF downloads automatically.

**Merge PDF — Combine Multiple PDFs into One File**

Merging PDFs is one of the most searched-for file tasks online. Whether you're combining chapters, assembling a report from separate files, or merging scanned pages, our Merge PDF tool does it entirely in your browser — no upload, no waiting, no size limit beyond your device memory.

**Features**

- **Multi-file upload** — Add as many PDFs as you need
- **Drag-to-reorder** — Drag files up or down to set the page order
- **Up/Down buttons** — Keyboard-friendly reordering
- **Page count display** — See how many pages each file contributes
- **Custom output filename** — Name the merged file before downloading
- **File size display** — See the size of each source file
- **Privacy** — Files never leave your browser

**Common Use Cases**

- Combine scanned document pages into one PDF
- Merge chapters of a report or thesis
- Assemble invoices or statements from multiple months
- Combine a cover letter with a CV
- Merge contract pages sent as separate files

**Privacy**

All merging is performed client-side using the pdf-lib JavaScript library. Your files are never uploaded to any server.

Frequently Asked Questions

There is no hard limit. You can add as many files as needed. Very large files (100MB+) may be slow to process depending on your device memory.

No. pdf-lib copies pages exactly — text, images, and vector graphics are preserved at their original quality.

Partially. The tool attempts to load encrypted PDFs with ignoreEncryption mode. Fully locked PDFs may fail — remove the password first using a PDF unlocker.

No. All merging is performed locally in your browser using the pdf-lib library. Your files never leave your device.

You can reorder entire files before merging. For page-level reordering within a single PDF, use our Split PDF tool to extract and recombine specific pages.