Why Tools Ku
- 100% free, no signup
- Merge locally—files never leave your device
- Drag to reorder before merging
- Download instantly when done
Merging PDFs is one of the most common document tasks: attaching contracts, combining scanned pages, or assembling report chapters. Tools Ku runs entirely in your browser using pdf-lib—read, append, and export without sending files to a server.
Local processing is ideal for sensitive documents. No account required—open the page and start merging.
Steps
- Upload two or more PDF files by click or drag-and-drop
- Drag files in the list to set merge order
- Click merge and wait for local processing
- Download the combined PDF
FAQ
- Are my PDFs uploaded to a server?
- No. Merging happens entirely in your browser. Data is not sent to toolsku.com or any third party.
- How many PDFs can I merge at once?
- There is no hard count limit; practical limits depend on browser memory and file sizes. Keeping total size under a few hundred MB usually works best.
- Will quality drop after merging?
- No. Pages are copied and appended without recompression, so vectors and text stay sharp.
- Can I change the merge order?
- Yes. Drag items in the list—the output follows that order.
- Can I merge password-protected PDFs?
- If a PDF has an open password, decrypt it first with our PDF decrypt tool (when you know the password), then merge.
- Does it work on mobile?
- Yes on modern mobile browsers, though large files may be slower—Wi-Fi is recommended.