How to split a PDF into parts
This takes about a minute. Nothing to install, and the file is never uploaded — your browser does the splitting.
Step by step
- Open the tool and drag your PDF onto the drop zone (or click to pick a file).
- Under the file name you will see how many pages it has and how many parts you will get.
- Set how many pages each part should contain.
- Optionally change the prefix — every part name starts with it.
- Press “Split” and download the parts one by one or as a single ZIP.
How many pages per part
There is no universal number — it depends on why you are splitting. If the document has to go by email, count megabytes rather than pages: check the size of the source file and split so that each part fits your attachment limit.
For reading, parts of 50–100 pages work well: they open fast on a phone and do not lag. For printing it makes more sense to cut by chapters — just enter the number of pages in the chapter.
How the output files are named
Every part is named as “prefix_partNUMBER_pFIRST-LAST.pdf”. For example, the third part of a book covering pages 201 to 300 becomes “Book_part3_p201-300.pdf”.
Because the page range is in the name, you will still know what is inside a year later, and sorting by name always gives the correct order.
If the file is very large
There is no server-side limit — only your browser’s memory matters. A few hundred megabytes is fine on an ordinary computer; on an old phone a very heavy file may take a while to open.
When there are many parts, use “Download all (ZIP)” — the browser packs them into one archive instead of dozens of separate downloads.
Questions & answers
Can I split a PDF without internet?
The splitting itself needs no connection — it runs inside your browser. You do need to load the page once, so a connection is required to open the site.
Does splitting reduce quality?
No. Pages are copied as they are, with no re-rendering or re-compression: text stays text and images stay identical.
Can I split a password-protected PDF?
No. A protected file has to be opened and unlocked first in software that can do it. The tool will tell you if the file is encrypted.
Does it work on a phone?
Yes, it works the same in a mobile browser. The finished parts land in your phone’s downloads folder.