Merge PDF Files Online

+ Add More PDFs

How to Merge PDFs

1. Add your PDF files — drag and drop or click to browse. Add at least 2 PDFs.
2. Reorder if needed — drag files in the list to change the merge order.
3. Click Merge — the files are combined instantly in your browser.
4. Sign in to download — create a free account to save the merged PDF.

100% Private — No Server Upload

Unlike most online PDF tools, your files are never uploaded to any server. The merging happens entirely in your browser using the pdf-lib library. This means your confidential documents stay on your device — nobody else ever sees them.

Frequently Asked Questions

Will merging affect the quality?

No. Pages are copied exactly as-is. All text, images, fonts, links, and formatting are preserved perfectly in the merged PDF.

Can I merge password-protected PDFs?

Password-protected PDFs must be unlocked before merging. For advanced PDF security features, use the DocFila app.

How many PDFs can I merge at once?

There is no hard limit. The practical limit depends on your device's available memory. Most devices handle merging dozens of PDFs without issue.

Can I also split or compress PDFs?

Yes — the DocFila app includes splitting, compressing, password-protecting, and many more PDF tools. Learn more about PDF tools.

Need split, compress & more PDF tools?

Merge, split, compress, password-protect, sign, and annotate PDFs — all in one app.

App Store Google Play