Merge PDF files
Add PDFs, put them in order, and download one combined document.
Choose PDFs to merge
Up to 20 files, 150 pages and 25.0 MB total.
How it works
How to merge PDFs
- Choose two or more PDF files. Each file is checked before it is added.
- Use Up, Down and Remove to set the finished page order. The first file's pages come first.
- Select Merge PDFs, check the page count, then download the combined PDF.
Example
Example
A 2-page cover letter followed by a 3-page portfolio becomes a 5-page PDF. Moving the portfolio above the letter puts its pages first.
Limits and output
- Up to 20 PDF files, 150 pages in total and 25 MB of combined input. These are safeguards, not a promise that every phone can process the maximum.
- Password-protected or encrypted PDFs are rejected. Remove the password in a PDF app first; this tool does not bypass encryption.
- This creates a new PDF from page content. Do not rely on digital signatures, interactive form fields, comments, bookmarks or attachments surviving, and the tool does not verify signatures.
Privacy
Files are read and merged in this browser tab. Filenames, page contents and the generated PDF are not sent to a server or added to analytics. Closing or reloading the page discards the working files.
Common questions
Are my PDFs uploaded?
No. The files are read into page memory and merged in this browser tab. They are not sent to a Two Trees server or stored by the tool.
Can I change the order after adding files?
Yes. Use the Up and Down controls before selecting Merge PDFs. The first file in the list supplies the first pages of the output.
Do forms or signatures survive merging?
Existing page content is copied, but forms, signatures and annotations can be affected by document edits. Open the downloaded PDF and inspect anything important before relying on it.