Merge PDF

Unlike most online tools that limit file sizes to 50MB or 100MB, our tool processes everything locally in your browser. You can merge massive PDF files instantly without waiting for slow uploads or hitting server limits.

Yes, 100% safe. Your files are never uploaded to any external server. The merging process uses your device's memory, ensuring total privacy for legal documents, invoices, or personal records.

Because our tool downloads the core processing engine to your browser, once the page loads, you can safely disconnect from the internet and merge your PDFs completely offline.

Absolutely. The merging process respects the original orientation and dimensions of each page. Your final document will seamlessly contain both landscape and portrait pages exactly as they were.

No. Our tool uses direct byte-level page copying via pdf-lib. It does not re-encode your images or text, meaning the output quality is 100% identical to your original files.

Before you click the merge button, simply drag and drop the uploaded file cards into your desired sequence. The final PDF will be created in the exact order you arranged them.

There is no hard limit imposed by our tool. You can merge dozens of files at once. The only limitation is the available RAM (memory) on your computer or mobile device.

Yes. The web application is fully responsive. You can select multiple PDFs from your mobile device's file manager and merge them directly in your mobile browser without downloading any apps.

Internal links and basic formatting are preserved during the merge. However, complex interactive forms or deeply nested bookmarks from the original files might be flattened depending on their structure.

Combining files adds slight metadata overhead. If you need a smaller file after merging, simply run the final merged document through our 'Compress PDF' tool to reduce its size.