About PDF Merger
This free PDF merger combines multiple PDF files into a single PDF document in your browser. Upload PDFs, drag to reorder them, then click Merge. The merged file downloads automatically. Your PDFs are never uploaded to any server — everything runs locally using PDF-lib.
Frequently Asked Questions
How many PDF files can I merge at once?+
There is no hard limit on the number of files. However, very large merges (10+ large PDFs) may take longer depending on your device. The progress bar shows merging status.
Can I reorder pages before merging?+
Yes — drag the rows in the file list to reorder the PDFs. The files are merged in the order shown top to bottom.
Is there a file size limit?+
Maximum 50MB per individual file. Total combined size depends on your device memory. For very large PDFs, use a desktop tool like PDF-Gear (free).
Are my PDFs sent to any server?+
No. All processing happens in your browser using PDF-lib. Your files never leave your device.