Merge PDF Files Online
Combine multiple PDF documents into a single file quickly, securely, and completely in your browser.
Drag & drop your PDFs here or browse
About Our Free PDF Merger
Our free online Merge PDF tool lets you combine multiple PDF documents into a single file quickly and securely. Because this tool runs entirely inside your browser using modern WebAssembly and client-side JavaScript, your files are never uploaded to any server. This guarantees absolute privacy for sensitive documents like bank statements, contracts, tax files, and medical reports. It works offline on any modern phone, tablet, or desktop, offering safe, lightning-fast merges without file size limits, watermarks, or sign-up gates.
Key Features
- 100% Client-Side Processing — No files are uploaded to any server, keeping your data confidential.
- Easy Drag & Drop — Seamlessly upload and order files before merging.
- Custom File Reordering — Simple up/down controls to arrange pages exactly how you want them.
- Completely Free — No paywalls, no limits on document count, and no watermarks added.
- Fully Responsive — Optimized for smooth touch interactions on mobile, tablets, and desktops.
- Zero Storage Footprint — All files exist in your local memory and are cleared upon page refresh.
Frequently Asked Questions
Is this PDF merger safe to use for sensitive documents?
Yes. Unlike other tools that upload your documents to remote cloud servers, this tool merges your PDFs entirely in your browser using local resources. Your files never leave your machine, ensuring complete privacy.
How do I change the order of the combined files?
Once you select or drop your files, a list will appear. Use the 'Move Up' and 'Move Down' buttons next to each file to arrange them in your preferred order before clicking the Merge button.
Are there any file size or file count limits?
There are no artificial limits imposed on file count or size. However, since files are processed locally in your web browser, very large files (e.g., hundreds of megabytes) will depend on your device's available memory.
Does this tool work offline?
Yes. Once the page is loaded, the processing is fully offline. You can disconnect from the internet and still merge your PDF files safely.
Can I merge password-protected PDFs?
No. Encrypted or password-protected PDF files cannot be processed directly without unlocking them first. Please make sure your files are decrypted before merging.