Merge PDF Files Online
Combine multiple PDF files into a single document. Reorder them however you like, then download — free, with no signup.
Your files are processed entirely in your browser — nothing is uploaded to a server.
Drag & drop PDF files here
or click below to choose files — up to 20 files, 25MB each
Merging your files…
Your PDF is ready
How to Merge PDF Files
Choose or drag in the PDF files you want to combine.
Reorder them using the arrows so they appear in the order you want.
Click “Merge PDF” and download your combined file.
Why Use This Tool
Is It Secure?
Yes — this tool runs entirely in your browser using JavaScript. Your PDF files are read locally on your device and merged there; they are never uploaded to OpsSpire’s servers or anywhere else. Closing this page removes everything from memory — nothing is stored.
Frequently Asked Questions
Is this PDF merger really free?
Yes. Merging PDFs is free, with no signup and no watermark added to your file.
Are my files uploaded to a server?
No. The merge happens entirely inside your browser using JavaScript. Your PDF files are never uploaded or transmitted anywhere.
How many PDF files can I merge at once?
You can merge up to 20 files in one go, each up to 25MB.
Can I reorder pages before merging?
Yes. You can reorder the files in the list before merging — the final PDF follows that order.
Will merging affect the quality of my PDFs?
No. Pages are copied directly from your original files into the combined document, so content and quality are preserved.
Can I merge a password-protected PDF?
Not currently. Password-protected or heavily encrypted PDFs may fail to merge — remove the password first, then try again.
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