PDF Merge

Choose Privacy to merge on this device, or Standard to process on our server. Standard files expire after 30 minutes and cleanup removes them shortly afterward.

Where should this run?

Privacy mode merges PDFs on this device without uploading them. Smaller limits protect browsers with limited memory. Page quality is preserved.

Standard processing becomes available when this site has HTTPS. Privacy mode works now and keeps files on your device.

Limit: 5 files, 10 MiB each, 50 MiB total.

How to use

1Upload two or more PDF files you want to combine

2Use the arrows to reorder files — merge order matches your list

3Choose Privacy for local processing or Standard for server processing

4Click Merge PDFs, then download your result

Frequently asked questions

Where does PDF Merge run?

PDF Merge in Privacy mode runs on your device without uploading. Standard mode supports larger files on our server. Both copy pages without re-rendering, so page quality is preserved. Standard files expire after 30 minutes and cleanup removes them shortly afterward.

Are my files actually deleted?

In Standard mode, files expire after 30 minutes and cleanup removes them shortly afterward. Privacy mode never uploads files.

Is there a file size limit?

Privacy: up to 5 PDFs of 10 MiB each (50 MiB total). Standard: up to 10 PDFs of 20 MiB each (100 MiB total).

Can I reorder files before merging?

Yes. Use the up/down arrows next to each file to set the exact merge order.

Is the merge lossless?

Yes. Pages are copied directly without re-rendering, so text, images and vector graphics stay at original quality.

How many files can I merge at once?

Up to 5 in Privacy mode or 10 in Standard mode.