Merge PDF Online — Combine PDFs into One
Combine multiple PDF files into a single document, in order, right in your browser. No upload, no signup. No upload — runs 100% in your browser
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How to use this tool
- Drop two or more PDFs onto the box.
- They merge in the order you added them.
- Click Download to save the combined PDF.
How merging works here
Each source PDF is opened with pdf-lib — a full PDF toolkit compiled to JavaScript — and its pages are copied, one by one, into a new document. Page content is copied as-is: text stays selectable, vector graphics stay vector, and nothing is re-rendered or re-compressed, so the merged file is pixel-identical to the originals. This is the same technique desktop tools like Preview and Acrobat use; it just happens locally in your browser tab.
Typical jobs
Combining a signed page back into a contract, assembling bank statements for a visa application, merging chapters exported separately from Word, and building a single upload from scanner apps that save one PDF per page.
Frequently Asked Questions
Are my files uploaded to a server?
No. Everything on this page runs inside your browser using JavaScript and WebAssembly. Your file never leaves your device — you can even disconnect from the internet after the page loads and the tool still works.
What order do the files merge in?
The order you selected them. To control it precisely, add the files one at a time in reading order.
Are bookmarks and links kept?
Pages are copied over at full fidelity; internal bookmarks and form fields are not carried across (the page content itself is identical).
Can it merge a password-protected PDF?
PDFs encrypted with an owner password are merged; files that require a password just to open cannot be read without that password.