Merge PDF
Combine PDFs in the order you want with the easiest PDF merger.
Select PDF Files
or drag & drop PDFs here
About Merge PDF Online — Free PDF Combiner
KAOpdf Merge PDF is the easiest way to combine multiple PDF files into one single document online for free. Whether you need to merge PDF for a report, join contracts, or combine chapters of an ebook, our tool handles unlimited files without any upload size restrictions. The entire merging process runs locally in your browser — no files are sent to any server. No sign up, no registration, no watermark, and no limits on how many PDFs you can combine. Drag, drop, reorder, and merge in under 10 seconds.
How to Use Merge PDF
Upload Multiple PDF Files
Select two or more PDF files from your device. You can upload as many files as your device memory allows.
Drag to Reorder
Drag and drop the file cards to arrange them in the exact order you want in the final merged PDF.
Merge & Download
Click Merge PDF and download your combined PDF document instantly — no waiting, no server queues.
100% Secure & Private
Your files are processed securely on our server and automatically deleted after 7 days. We never share or store your data.
Super Fast & Lightweight
Processing runs instantly on our optimized VPS server, bypassing slow client-side queues.
Free & No Watermark
All PDF tools are accessible for free without watermark, limits, or registration.
Frequently Asked Questions (FAQ)
Upload all your PDF files to KAOpdf Merge PDF, drag them into your preferred order, and click Merge PDF. Your combined PDF will be ready to download in seconds.
No. You can merge as many PDF files as your device's memory allows. There is no restriction from our side.
No. KAOpdf never adds watermarks to any merged documents. Your files are returned exactly as merged, completely clean.
Yes. No account, email, or registration is required. Open the tool, upload your files, and merge immediately.
No. Merging is processed entirely in your browser. Your files never leave your device and are never uploaded to any server.
Yes. You can drag and drop the file cards in the UI to set the exact page order before merging.
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