Merge PDF Files Free Online (100% Private, No Uploads)
Combine PDF files into one document instantly in your browser. 100% free with no file limits, no signups, and zero server uploads for total privacy.
How to Merge PDF
Upload Your PDF Files
Drag and drop multiple PDF files into the upload area, or click to browse and select them from your device.
Arrange the Order
Reorder the file thumbnails by dragging them into your preferred merge sequence.
Merge & Download
Click Merge to combine all files into one PDF. Your merged document downloads instantly.
The easiest way to combine your PDFs
I know how frustrating it is when you have multiple PDF files and just need them combined into one simple document. I built this merge tool to be stupidly simple: just drag your files into the box, arrange them in the exact order you want using the visual thumbnails, and click merge.
Best of all, your files never leave your computer. The entire merging process happens right inside your web browser using WebAssembly. This means if you're combining sensitive legal contracts, tax returns, or financial statements, they stay 100% private. It is completely free, with no file size limits or registration required.
Frequently Asked Questions
Does Merge PDF preserve the original PDF formatting and quality?
Yes. Merge PDF modifies the PDF structure without re-encoding pages or compressing images. All fonts, vector graphics, embedded images, and layout remain exactly as they were in the original document.
Is it safe to use Merge PDF with confidential documents?
Absolutely. Merge PDF processes everything locally inside your web browser using JavaScript and WebAssembly. Your files are never uploaded to any external server. Sensitive documents, contracts, and personal files remain completely private on your device.
Is Merge PDF really free? Are there hidden limits?
Yes, Merge PDF is 100% free with no hidden costs. There are no file size limits, no daily usage caps, no watermarks on your output, and no account registration required. Use it as many times as you need.
How many PDF files can I merge at once?
There is no fixed limit. You can merge as many PDF files as your browser memory allows. Most users combine 10–50 documents without any issues.