Loading PDF tool...
Drag and drop multiple PDF files or click to select them from your device. All files stay in your browser — nothing is uploaded.
Use the arrow buttons to reorder your files. The PDFs will be merged in the order shown on screen.
Click "Merge PDF" and download a single combined file containing all your documents in the chosen order.
Your files never leave your device. All merging happens in your browser using WebAssembly — no server uploads, no third-party access.
No registration, no file limits, no watermarks. Merge as many PDFs as you need, completely free.
The merged PDF retains the original quality, fonts, and formatting of all source documents. No re-encoding or compression.
Combine invoices into a single PDF for accounting and record-keeping
Merge contract pages that were scanned separately into one document
Create a portfolio by combining multiple PDF documents
Combine research papers or articles for a unified review package
| Format | Description | Best For |
|---|---|---|
| PDF 1.4+ | Standard PDF format | Universal compatibility |
| PDF/A | Archival format | Long-term document preservation |
| Mixed sources | PDFs from different applications | Combining documents from Word, Sheets, scanners |
Arrange files in the desired order before merging — use the arrow buttons to reorder
If some PDFs are password-protected, unlock them first using the Unlock PDF tool
For very large merges (50+ files), process them in smaller batches for best performance
Check the page count of the merged file to confirm all documents were included. After merging, add page numbers for better navigation
Combining several PDFs into one can be done in your browser (like FyleTools) or by uploading the files to an external server. The main differences are privacy and limits.
FyleTools merges your PDFs entirely in your browser using WebAssembly and the lopdf library compiled from Rust. Your documents are never uploaded to any server — the merge algorithm runs locally on your device. This means confidential contracts, financial documents, and personal files stay completely private.