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Merge PDF Files Locally

Seamlessly combine multiple PDF documents into a single organized file right in your browser.

Drag & drop your files here, or click to browse

.PDF

Max file size: 20MB per job

No account required
🔒 Processed locally, secure
📦 Max size 20MB
Files are processed directly in your browser and are never uploaded.

Uploading file to server...

Please do not close this window while we compile your files.

Reading files...
Waiting in queue...
Processing pages...
Creating output file...
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Success! Your file is converted.

Your document has been compiled and is ready for download.

Download PDF
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📋 How to use in 3 steps

  1. 1

    Select two or more PDF documents from your device.

  2. 2

    Our browser-side engine processes pages locally without uploading.

  3. 3

    Download your unified PDF document instantly.

📁 Supported formats

Fully supports formats: PDF.

💡 Tips to avoid font corruption

Always use standard Unicode fonts like Times New Roman, Arial, or Calibri. If using custom fonts, embed them in your document before saving.

⚠️ Common errors & solutions

⚡ Password-locked files

Please remove password protection from the file before uploading so the system can read and convert it.

⚡ Corrupted or incorrect formats

Make sure your file opens correctly on your device before uploading.

Frequently Asked Questions

Is there a limit on how many files I can merge?
You can merge as many pages as you want, provided the aggregate file size is under 20MB for stable memory usage.
How are my files protected?
This tool runs locally in your browser memory. Your files are never uploaded to any servers.
Will hyperlinks and bookmarks be kept?
Yes, pdf-lib maintains internal page linking, annotations, and outlines when copy-mapping pages.