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📄 Merge PDF Files Online – Free Secure PDF Merger

Easily merge multiple PDF files into one high-quality document directly in your browser. Our free online PDF merger is fast, secure, and private — no uploads or installations needed. Combine your PDFs seamlessly for work, school, or personal projects.

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Select PDF Files to Merge

Drag and drop PDF documents or click below to upload.

💡 What is a PDF Merger?

A PDF merger is an online tool that allows you to combine multiple PDF files into a single organized document. It’s widely used for document management, academic submissions, contracts, and reports. All merging is handled locally within your browser for maximum privacy — no data is uploaded to any server.

⚙️ How to Merge PDFs Online

  1. Click “Choose PDF Files” or drag and drop your files into the upload box.
  2. Arrange and preview your PDF list.
  3. Click “Merge PDFs” to combine all files into one.
  4. Download your merged file instantly.

🔒 Is It Secure?

Yes — this secure PDF merger works entirely offline using PDF-Lib JavaScript. Your documents never leave your browser, ensuring complete privacy and security.

🌐 Learn More About PDFs

❓ Frequently Asked Questions

Can I merge PDFs offline?

Yes. This tool merges PDFs entirely in your browser using JavaScript — no internet upload is needed, ensuring privacy.

Is there a limit to the number of files?

You can merge multiple files simultaneously, though performance may vary with very large PDFs.

Will my PDFs lose quality?

No. The merged output maintains the original quality and resolution of each PDF page.

Is this tool free?

Absolutely! This free PDF merger requires no registration or installation — use it directly in your browser.

Can I merge password-protected PDFs?

Only if you can open them first; encrypted PDFs must be unlocked before merging.