Merge PDF joins two or more files into one: add them with the button or drop several at once, put them in order, and press Merge. Each row shows the file’s page count and size. The output name starts as merged.pdf and can be edited; .pdf is added if you leave it out.
Split PDF takes one file and saves a single page or a range of pages as a new PDF: enter a page and press Extract page, or enter From page and To page and press Extract pages. Enter in a field runs its action.
Example
Merge report.pdf (12 pages) and appendix.pdf (3 pages), with the report first. Press Merge: the status reads “Merged 2 files, 15 pages” and the size, and Download saves merged.pdf, with pages 1 to 12 from the report and 13 to 15 from the appendix.
Split report.pdf with From page 3 and To page 7: Extract pages gives report-pages-3-7.pdf with 5 pages, status “Extracted pages 3–7 (5 pages)”. Extract page with 4 gives report-page-4.pdf.
Limitations
- All files on the page together can be at most 50 MB, merge and split counted as one. Sizes are shown in MB of 1,048,576 bytes.
- A file is accepted as a PDF by its content, not by its extension. Damaged or truncated files are refused, and Merge stays disabled while any listed file has an error.
- Password-protected PDFs are refused, including files that open without a password but have an owner password restricting printing or copying.
- Split handles one range at a time; several ranges in one run and one file per page are not supported. Adding a second file replaces the first.
- No rotating, deleting or reordering of single pages, no compression, no password removal.
FAQ
Are my files uploaded?
No. The PDFs are read and combined in your browser, and nothing is sent to a server, stored in the address bar or kept in browser storage.
How do I change the order of the files?
Drag a row in the list, or use its Move up and Move down buttons, which also work from the keyboard and on touch screens. Sort by name orders the list by file name, with numbers sorted as numbers, so 2.pdf comes before 10.pdf. The merged file follows the list from top to bottom.
How do I extract one page, and how are pages counted?
Enter the page number and press Extract page. In a range, both ends are included. Pages are counted from 1 in the order they are stored in the file, not by the numbers printed on them. If a book starts with ten pages of front matter, its printed page 1 may be page 11 here.
What is kept and what is lost?
The new PDF is built from copies of the pages, so text, images, page size, rotation and annotations stay as they were. Document metadata (title, author, dates), bookmarks, attachments, accessibility tags, page labels and digital signatures are not carried over; a signature would be invalid after any change anyway. Form fields stay visible but can no longer be filled in, and links to another page of the same document may not work. The only thing added is the producer “ToolBit” in the document properties.
Why was my PDF refused?
The error message names the reason: the file is password-protected, it is damaged or not a PDF, or the files on the page would be over 50 MB in total. Remove a password in the program that created the file, then add it again.