Formats, file types, and size limits for Merge PDF
A quick reference for what the merger accepts.
Supported input
The tool combines PDF documents.
| Format | MIME type | Status |
|---|---|---|
| `application/pdf` | Supported |
To merge other formats, convert them to PDF first (images can be turned into PDF, then combined).
Size limits
Each PDF can be up to 100 MB. There is no daily cap on how many files you can merge, and because processing runs locally, the practical limit is your device's memory.
Output
The result is a single PDF containing every file, in the order you arranged. Page order and bookmarks are respected when available.
Getting the best results
- Convert non-PDF inputs to PDF before merging
- Reorder before merging so the output reads correctly
- Preview before downloading to confirm the final order
Verdict
Merge PDF combines PDF input up to 100 MB each, with no file ever leaving your device.