How many PDFs can I merge at once?

There is no hard limit on the number of files, but processing is limited by your device's memory. Merging 10–20 PDFs works well for most devices.

Will the merged PDF keep all original pages?

Yes. Every page from every PDF is included in the merged output, in the order you set.

Yes, completely free with no signup required.

Merge PDF Files Online Free

Combine multiple PDF files into a single document. Drag to reorder files before merging. Processed entirely in your browser — your files are never uploaded to any server.

1 Upload PDF Files

PDF only · Select 2 or more files · Max 50MB each

3 Merge

💡 All pages from each PDF are preserved in the merged output. Password-protected PDFs cannot be merged — remove the password first.

How to Merge PDF Files

Upload PDFs — Select two or more PDF files from your device.

Reorder — Drag files up or down to set the order they appear in the merged PDF.

Download — Click Merge PDFs and save the combined file instantly.

Frequently Asked Questions

Are my PDFs uploaded to a server? +

No. Everything is processed locally in your browser using pdf-lib. Your files never leave your device.

How many PDFs can I merge? +

There is no hard limit. In practice, merging 10–20 PDFs works smoothly. Very large files may be slower depending on your device.

Will all pages be included? +

Yes. Every page from every uploaded PDF is copied into the merged output, preserving the original layout, images, and text.

Can I merge password-protected PDFs? +

No. Password-protected PDFs are encrypted and cannot be read by this tool. Remove the password first using your PDF reader, then upload.

Is this tool free? +

Yes, completely free. No signup, no watermark, and no limit on how many times you use it.