How do I combine several PDF files into one?
Add two or more PDFs, set the order you want, and the tool writes a single PDF containing every page in that order. Merging happens in your browser with pdf-lib, so the files are never uploaded and there is no page limit imposed by a server.
Runs entirely in your browser · no upload · no account · no watermark
- Choose two or more PDF files.
- Put them in the order you want using the arrows.
- Merge, then download the single PDF.
Choose two or more. The files are read by this page and never sent anywhere.
What this page can do
- Combine any number of PDF files into one
- Reorder the input list before merging
- Keeps the original page size and rotation of every page
- Files are never uploaded
When to use this page
- Joining a handful of signed pages, invoices or scans into one file before you send it off.
- Combining documents you would rather not upload to a third-party server.
- Putting pages in a specific order when all you need is the pages themselves, in that order.
When to use something else
- You need to edit the text, add a signature field or fill in a form — this tool copies pages, it does not edit them.
- The source PDFs are encrypted or password protected; the page will say so and stop rather than produce a broken file.
- You need document-level bookmarks, attachments, form fields or internal links preserved across the merge.
How it compares with other options
Desktop tools such as Acrobat, qpdf or pdftk can preserve outlines, form fields and metadata, optimise the result, and handle encrypted or very large documents in a batch. A hosted merge service can also take bigger files, but you have to upload them. This page only copies page objects into a new document: bookmarks, attachments and form logic are not carried over, page annotations are not guaranteed, and the output is roughly the sum of the inputs because nothing is re-compressed. For a few ordinary PDFs that must stay on your device, that trade is usually worth it; for a 500 MB archive or a form that has to keep working, use a desktop tool.
Where your files go
Nowhere. This page loads the code that does the work, and from then on the file you open is read by your own browser. There is no upload step, no temporary server copy and no cleanup to trust — the data never crosses the network, so there is nothing to delete afterwards. You can confirm it yourself: open your browser’s network panel while the tool runs and watch it stay quiet.
Questions about this tool
- Is there a limit on how many PDFs I can merge?
- No — nothing is uploaded, so there is no server quota. The practical limit is your device’s memory: a handful of large documents is fine on a phone, and hundreds are fine on a desktop.
- Does merging change the pages inside my PDFs?
- No. Each page is copied into the new document as it was, including its size and rotation. The text stays selectable and nothing is re-compressed or rasterised.
- What if my PDF is password protected?
- The tool cannot open an encrypted PDF, and it will tell you rather than produce a broken file. Remove the password in the application that created it, then merge.
Other tools in the same group
- Split PDFExtract a page range, or explode a document into one PDF per page. Runs locally.
- Rotate & reorder pagesSee every page, rotate or delete the ones you do not want, drag to reorder, then save.
- Add page numbersStamp page numbers onto every page, at the corner you choose. Text stays selectable.
- Images to PDFBuild a PDF from JPG, PNG or WebP images, one page each or fitted to a page size.
Guides
- How to merge PDF files without uploading themCombine several PDFs into one document, in the order you choose, entirely in your browser. No upload, no account, no page limit.
- How to split a PDF: extract a page range or one file per pagePull out the pages you need from a PDF, or turn a document into one file per page — locally, without uploading it.