FormatOwlFormats and limits
- Input
- PDF · 2–20 files
- Output
- One PDF
Choose 2 to 20 PDF files, up to 50 MiB per file and 1,000 pages per file. The combined document is limited to 1,000 pages. Encrypted and digitally signed PDFs are rejected.
How to use this tool
- Upload at least two PDF files and wait for each upload to finish.
- Move files up or down until the pages appear in the order you need.
- Start the merge, review the combined PDF, and download it when the result is ready.
Settings and results
The files are merged in the order shown before you start. Keep the original files until you have checked the page order and important content in the result.
File storage and deletion
Files are uploaded and processed on the server. Originals and results are stored privately and accessed through their account or browser session; downloads use short-lived links. By default, files expire 24 hours after upload and are removed by the cleanup process. You can delete them earlier in your workspace. The current local default allowance is 20 uploaded files per 24 hours.
Read the usage and data guideCommon questions
Can I change the page order before merging?
Yes. Move each uploaded file up or down before starting. The merged PDF follows that file order.
Can I merge encrypted or signed PDFs?
No. Encrypted and digitally signed PDFs are rejected because opening or rewriting them could require a password or invalidate a signature.