Merge PDF files
This page explains merge PDF files, what actually changes inside the file, and what to expect. The tool itself runs entirely on your device.
How to merge PDF files
Three steps:
- Open the tool and drop your PDF in — or choose it from your device.
- Pick a setting. Balanced suits most documents.
- Download the result. Nothing was uploaded at any point.
What to expect
Merging copies pages across exactly as they are: nothing is re-encoded, so quality is identical to the originals. Each page keeps its own size and orientation, so combining A4 and Letter produces a document containing both. The output is a single file with a fresh page index.
Practical tips
- Set the order before merging — the files combine top to bottom as listed.
- Page sizes are preserved, so mixing A4 and Letter produces a document with both. That is correct, if sometimes surprising at the printer.
- Merging is lossless: pages are copied across exactly, so nothing is re-encoded or degraded.