Merge PDF
Combine multiple PDF files into one.
Merge several PDF files into a single document in seconds. Select two or more PDFs, choose the order, and download one combined file — everything happens locally in your browser, so your documents never leave your device.
How to use
Select your PDF files
Click SELECT PDF and choose two or more files, or drag and drop them into the panel. You can select up to 20 PDFs at once.
Order the files
The files are merged in the order shown in the list. Remove any file by clicking the x button, then re-add it if needed.
Merge
Click the MERGE button. Processing happens instantly in your browser — watch the progress bar complete.
Download
When the result is ready, click DOWNLOAD to save your combined PDF. Start over any time to merge a different set.
Features
Privacy & security
Your PDFs are read and combined inside your browser using local processing. Nothing is uploaded, stored, or sent to any server.
Limitations
- Very large files (over ~200 MB) may be slow because processing runs on your device.
- Merging copies pages without re-compressing them, so the output size is roughly the sum of the inputs.
Frequently asked questions
Yes. Merge PDF is completely free with no limits on the number of files or pages, and no account is required.
No. All merging happens locally in your browser using WebAssembly. Your files never leave your device.
Yes. The tool works in any modern mobile browser — pick files from your device storage, camera, or files app.
You can merge up to 20 PDFs at once. Each file can be as large as your browser and device memory allow.