Merge PDF
Combine multiple PDF files into one document directly in your browser. 100% private.
Drop PDF files here to merge
Processed 100% locally in browser memory
Overview
Merge PDF files online for free. Drag and drop two or more PDF documents, arrange their order, and download a single merged PDF instantly. Files stay strictly on your device.
Combine & Merge PDF Files Online – Fast, Private & Unlimited
Merge multiple PDF documents into a single, organized file effortlessly with DGNTool. Our in-browser PDF merger runs directly in your device memory via client-side WebAssembly and PDF-lib. This means your private contracts, invoices, and sensitive documents are never uploaded to any remote server.
Rearrange pages, customize document order, and combine unlimited PDF files without file size limits, subscriptions, or watermarks. The final compiled PDF preserves original vector graphics, embedded fonts, and bookmarks with 100% fidelity.
How to Merge PDF Files in 3 Simple Steps
Fast & IntuitiveSelect or Drop PDF Files
Drag and drop multiple PDF documents from your computer or mobile device into the merger workspace.
Arrange Document Order
Drag file cards to rearrange the chronological sequence or page order of your final unified document.
Merge & Download
Click "Merge PDF" to compile your combined document locally in seconds and download it immediately.
Key Highlights & Advantages
Zero server uploads. Everything processes securely within your local browser memory.
Immediate results with no file upload or download queues.
No registration, no paywalls, and no hidden quotas.
Seamlessly optimized for mobile smartphones, tablets, and desktop workstations.
All data processing runs natively via W3C compliant browser hardware acceleration.
- Review the thumbnail previews before clicking Merge to ensure your cover letter or title page is placed first.
- Combine this tool with our PDF Compressor to reduce the final file size for hassle-free email attachments.
Frequently Asked Questions
4 Q&AsIs there a limit on file size or number of PDF pages I can merge?
No. Because DGNTool processes everything locally within your web browser using your device hardware, there are no artificial file quotas or page limits.
Are my confidential documents uploaded to an external server?
Never. The entire merging process executes 100% client-side in RAM. Your confidential documents remain strictly on your machine.
Will text formatting, hyperlinks, and bookmarks be preserved?
Yes. The underlying byte stream is compiled losslessly without re-rendering or rasterizing your text, maintaining crisp resolution on retina screens.
Can I merge PDFs with different page sizes (A4, Letter, Legal)?
Yes. DGNTool seamlessly harmonizes documents with varied page dimensions and orientations into one unified file.