Combine several PDFs into one document, in the order you choose. Pages are copied across exactly as they are — nothing is re-encoded and nothing is re-drawn. Your file never leaves this page. Everything happens in your browser, and there is no upload endpoint to send it to — that is checked by a build gate that fails if any network code reaches a tool’s bundle.
How to do it
- Add two or more PDFs.
- Put them in the right order with the arrows beside each row. The order in the list is the order in the finished document.
- Press Merge and download the combined PDF.
Questions
Does merging change the quality?
No. Pages are copied from one document into another without being decoded, so every page in the result is byte-for-byte the page it came from.
Can I reorder the files after adding them?
Yes — that is what the arrows beside each row are for. They work from the keyboard as well as the mouse, which drag-and-drop reordering does not.
What if one of my files is password-protected?
It cannot be merged, and the tool will say so. A protected PDF has to be unlocked by somebody who has the password before any tool can read its pages.
Is there a limit on how many files?
150 files, or 250 MB in total, whichever comes first. Those are the ceilings a browser can hold in memory at once rather than a rule we chose, and a batch over them is refused up front rather than running out of room half way through.