1. What does this tool do
This free online PDF merge and split tool combines multiple PDFs into one file or splits one PDF into separate pages—all in your browser. Use it for merge PDF, split PDF, or combine PDF to assemble reports, handouts, or extract pages. No upload, no server, no account. Your documents stay on your device. Ideal for reports, handouts, forms, or privacy-sensitive documents.
2. How to use it
Quick start: Choose Merge or Split, add/open PDFs (for merge: two or more in order; for split: one file), arrange or select pages, then download the merged PDF or split files.
- Choose mode — Select Merge (combine files) or Split (split one file into pages or ranges).
- Add or open files — For merge: add two or more PDFs in the order you want. For split: open one PDF.
- Arrange or select — Merge: reorder files if needed. Split: select pages or ranges to extract.
- Download — Get the merged PDF or the split files (e.g. one PDF per page). All processing is done locally.
3. How it works
The tool uses a client-side PDF library (e.g. PDF-lib or similar) to read PDF structure, merge document pages, or split them into new documents. Files are read via the File API; output is generated in memory and offered as a download. No data is sent to a server. All processing runs in your browser. No data is sent to any server.
4. Use cases & examples
- Reports — Merge cover, table of contents, and chapters into one PDF.
- Handouts — Split a long PDF into single-page files for distribution.
- Forms — Combine signed pages into one document.
- Privacy — Sensitive documents never leave your computer.
Example
- Merge: file1.pdf (3 pages) + file2.pdf (2 pages) → one 5-page PDF.
- Split: 10-page PDF → 10 separate PDFs, one per page.
5. Limitations & known constraints
- Browser limits — Very large or many PDFs may slow the tab or hit memory limits. Use reasonable file sizes.
- Complex content — Some advanced PDF features (e.g. certain forms or encryption) may not be fully preserved.
- No OCR — The tool does not add or modify text recognition; it only merges or splits existing pages.