Order matters
Every page from the first file is copied before every page from the next file. Reorder files before merging.
PDF tools · Local processing
Merge PDF
Combine multiple PDF files in the order you choose. Your PDFs stay on your device.
Process on your device
Drop PDF files here
The practical guide
One document, assembled entirely on your device.
Add PDFs, sort them by useful file details or drag anywhere on a first-page preview card to create a custom order, choose the download name, and merge.
Originals stay untouched
The merged PDF is a new download. Selected files are read from browser memory and are never overwritten.
Large files
Merging many large PDFs needs substantial browser memory. Work in smaller batches if the device becomes slow.
Privacy by architecture
Your PDFs stay on your device.
The selected document bytes, page choices, and generated output are processed locally and are not intentionally uploaded to an application server.
Questions, answered
Frequently asked questions
Is my PDF uploaded?
No. PDF reading, editing, rendering, and output generation happen in this browser tab without uploading the document to an application server.
Why can a large PDF be slow?
Local processing uses this device’s memory and CPU. Large or image-heavy documents can take longer, especially on mobile.
Can encrypted PDFs be processed?
Password-protected or permission-restricted documents may not open. The tool does not bypass encryption.