Merge PDF online without uploading your files
Join several PDFs into one, in any order, with a preview of every page. It all happens in your browser: contracts, case files and reports never leave your computer.
✓ no upload✓ unlimited use✓ annual plan
The document is processed in your browser and is never sent anywhere.
How it works
Each file is read into the browser's memory, pages are copied into a new document in the chosen order and the result is written locally. Existing signatures stay in the file, but since any merge changes the document they no longer cover the whole: use the verifier to check.
- 01Select the file
Drag the PDF into the tool area or click to choose it. It stays in your browser's memory only.
- 02Local processing
The PDF engine runs on your computer, in JavaScript and WebAssembly. Nothing is sent; you can watch the Network tab.
- 03Download the result
The finished file is saved straight from the browser to your disk. Close the tab and no copy remains anywhere.
Frequently asked questions
Is there a limit on files or size?
We impose none. The practical limit is your browser's memory; documents of hundreds of pages work fine.
Can I reorder pages before merging?
Yes. Drag the previews to set the file order before generating the final PDF.
Does merging signed PDFs invalidate the signatures?
Merging creates a new document; the original signatures now cover only the parts they signed. Keep the signed originals and, if needed, check them with the Verify signatures tool.