Merge PDF Files Online
Combine multiple PDF documents into one file. Merge PDF is useful when you have separate reports, invoices, scanned pages, or chapters that belong in a single, shareable document — without installing software or creating an account.
How to use this tool
- Select two or more PDF files by dragging them into the box or clicking to browse.
- Check the list of added files and remove any you do not want to include.
- Click “Merge PDFs” to combine them in your browser.
- When processing finishes, your merged file downloads automatically as merged.pdf.
Features
- Combine multiple PDF files into a single document.
- Runs entirely in your browser — no uploads, no server storage.
- Add as many PDFs as you need before merging.
- Instant download of the combined result.
Common use cases
- Joining several scanned pages or chapters into one PDF.
- Combining monthly invoices or statements into a single archive.
- Merging presentation handouts and appendices before sending.
- Assembling application or submission documents in order.
Supported files and limitations
Supported inputs
- Two or more valid, readable PDF files selected from your device.
- Files are combined in the order shown in the selected-file list.
Limitations
- Encrypted or damaged PDFs may not open. Remove protection only when you are authorized to do so.
- Processing uses browser memory; very large documents may exceed the memory available on your device.
- The tool does not preserve digital-signature validity after modifying a document.
Troubleshooting
- A PDF will not load.
- Check that it opens in a trusted PDF reader and is not password-protected or damaged, then try again.
- The merge is slow or the tab closes.
- Try fewer or smaller files at a time and close other memory-intensive tabs.
Privacy and security
Merge PDF combines your files entirely inside your browser. The PDFs you select are read and joined on your device, and are never uploaded to a server.
Frequently asked questions
How does the Merge PDF tool work?
Your selected PDFs are merged directly in your browser using local processing. The files are combined on your device and the result is downloaded straight back to you.
Are my PDF files uploaded?
No. Everything happens locally in your browser, so your documents are never sent to a server.
Can I merge more than two files?
Yes. You can add multiple PDF files and they will be combined in the order you added them.
Is there a file-size limit?
There is no fixed server-side limit because processing happens on your device. Very large files depend on your browser and device memory.
Which browsers are supported?
ToolsUlagam works in all modern browsers, including Chrome, Firefox, Safari, and Edge.
Can I change the order of the merged PDFs?
The files are merged in the order displayed in the list. Remove and add files again in the desired order before merging.