How do I merge PDF files for free?

Drop your PDF files onto the upload area, drag them into the order you want, then click Merge. Your combined PDF downloads immediately. Everything runs in your browser — files never leave your device.

Is there a limit on how many PDFs I can merge?

No hard limit. Merging happens entirely in your browser, so the practical limit is your device's available memory. We've tested with 50+ PDFs at a time without issue.

Are my PDFs uploaded to a server?

No. Merge PDF runs entirely in your browser using pdf-lib. Your files are never uploaded — they stay on your device the whole time.

Will the merged PDF preserve text and images?

Yes. We preserve all text, images, fonts, and most bookmarks from the source PDFs. Form fields are flattened during merge.

Is this tool really free?

Completely free with no signup, no ads, and no watermarks. We built it because the alternatives upload your files to their servers — we don't.

All Tools

Merge PDF

Combine multiple PDFs into one. Drag to reorder, then download. Everything happens in your browser — your files never touch a server.

Drop PDF files here or click to select

Files stay on your device — nothing is uploaded