Merge PDF Files — Free & Private
Combine multiple PDF files into one, free and without uploading anything — merging happens entirely in your browser. No signup, no watermark, no limits.
Merge PDFs without uploading them
Most "free PDF mergers" upload your documents to their servers — a real concern for contracts, medical records or anything private. This tool is different: the merging runs entirely in your browser using JavaScript. Your files never leave your device — you can even disconnect from the internet after the page loads and it still works.
Add files, arrange them with the arrows, and download the combined PDF. There are no page limits, watermarks or signups; practical file size depends only on your device's memory (hundreds of pages are fine on any modern machine). Need just some pages instead? Use split PDF, or rotate pages first.
Frequently asked questions
Are my PDF files uploaded to your server?
No — merging is done by JavaScript on your own device. The files never travel over the network, which you can verify in your browser's developer tools.
Can I merge password-protected PDFs?
Encrypted PDFs that require a password to open can't be processed. Remove the password first (with the password you know), then merge.
Is there a file or page limit?
No artificial limits. Very large merges are constrained only by your device's memory.