Merge PDF files into one — free, no watermark
Combine multiple PDFs into a single document, right in your browser. Drag to reorder, then download. Your files never leave your device.
- ✓ No watermark
- ✓ No sign-up
- ✓ No file size limit
- ✓ Works offline
How to merge pdf
- 1Click ‘Add PDFs’ or drag your PDF files into the box below.
- 2Reorder them with the up/down arrows until the sequence is right.
- 3Click ‘Merge PDFs’ — the combined file downloads instantly, with no watermark.
Merging PDFs is one of the most common document tasks — combining a cover letter with a CV, stitching signed contract pages together, or assembling a report from separate exports. pdfia does it instantly and privately, without the upload step that tools like Smallpdf and iLovePDF require.
Because everything runs locally in your browser, there is no waiting for files to upload or download from a server, and nothing sensitive is transmitted over the internet. Close the tab and nothing remains anywhere but on your own machine.
Frequently asked questions
＋ － Are my files uploaded to a server?
No. Merging happens entirely in your browser using WebAssembly. Your PDFs never leave your device, which makes pdfia safe for confidential documents.
＋ － Is there a limit on the number of files or size?
There is no hard cap on the number of files. Very large merges are limited only by your device's available memory, not by us.
＋ － Will the merged PDF have a watermark?
Never. pdfia does not add a watermark to any output file, and there is no sign-up required.
＋ － Does the original quality stay intact?
Yes. Merging copies pages as-is, so text stays selectable and image quality is unchanged.