Is it safe to merge PDFs online?

Yes! PDFCompiler processes all files directly in your browser. Your PDFs are never uploaded to any server, ensuring complete privacy and security.

How many PDFs can I merge at once?

You can merge up to 20 PDF files at once, with a combined size limit of 100MB. For larger jobs, consider using our API or desktop application.

No, PDFCompiler merges PDFs without any quality loss. The original content, formatting, and resolution are preserved exactly.

Before merging, you can drag and drop files to arrange them in any order. For page-level reordering, use our Rotate & Reorder tool after merging.

Combine multiple PDF documents into a single file. Drag and drop to reorder pages. 100% free and secure - all processing happens in your browser.

Drag & drop PDF files here

or click to browse from your device

PDF files up to 100.0 MB • Max 20 files

Processed locally in your browser • No upload required

Privacy FirstNo upload required

Lightning FastProcessed locally

SecureBrowser-based

Drag and drop or click to select multiple PDF files you want to merge.

Drag files to reorder them in the sequence you want in the final document.

Click the Merge button and download your combined PDF instantly.

Is it safe to merge PDFs online?: Yes! PDFCompiler processes all files directly in your browser. Your PDFs are never uploaded to any server, ensuring complete privacy and security.
How many PDFs can I merge at once?: You can merge up to 20 PDF files at once, with a combined size limit of 100MB. For larger jobs, consider using our API or desktop application.
Will merging affect the quality of my PDFs?: No, PDFCompiler merges PDFs without any quality loss. The original content, formatting, and resolution are preserved exactly.
Can I change the order of pages after merging?: Before merging, you can drag and drop files to arrange them in any order. For page-level reordering, use our Rotate & Reorder tool after merging.