Where does a PDF split run?

A PDF of 100 MB or smaller splits in the browser with pdf-lib. You can make up to 40 parts. If that local split fails, the page retries on the server, and the server path uses 12 MB and eight a day on the free plan.

Can one page land in two split files?

Each page goes to one part. Assign it to the part that should include it. Pages you leave unassigned are left out of the downloads. The starting point is an even two-way split, and you can rearrange from there up to 40 parts.

What do the split file names look like?

Each download’s name includes the part number and the page range, so you can see which pages are inside before you open it. The parts arrive as separate downloads. You get one PDF per part rather than a single ZIP of all parts.

What happens to pages I never assign?

Unassigned pages are left out of the downloads. Use that when a cover, a blank, or a private sheet should stay behind. Every page you do assign goes to one part, and that part downloads as its own PDF.

When does the split use the server?

The usual path is local for a PDF up to 100 MB. If the browser split fails, the page retries on the server. That server path uses the free limit of 12 MB and eight times a day. The downloads are still separate part files.

Can I merge or rotate while I split?

This page splits a PDF into parts, up to 40, with each page in one part. Merging, rotating, and adding a password are separate tools. Finish the split, download the parts, and open the other tool when that is the next job.

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Split PDF: the parts you want to keep

Split one PDF in the browser into separate downloads. Each page goes to one part, and the file name includes the page range.

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Split one PDF into separate files, each holding the pages you assign. On a PDF of 100 MB or smaller, the split runs in the browser with pdf-lib, and you download each part on its own. You can make up to 40 parts. Each page goes to one part. Pages you leave unassigned stay out of the downloads. The tool starts from an even two-way split, and you can move pages until the groups match the packets you need. Each download’s file name includes the part number and the page range, and the files arrive as separate downloads rather than one ZIP. If the browser split fails, the page retries on the server, and that server path uses the free limit of 12 MB and eight times a day. This page divides a PDF you can already open. Merging, rotating, and adding a password are separate jobs on their own pages. The 100 MB figure is the local cap for the browser split.

Separate PDFs, one download per part

Assign pages to parts, up to 40, and download each part on its own. Unassigned pages stay out, and each file name shows its range.

A browser split up to 100 MB

When the file is a PDF of 100 MB or smaller, pdf-lib splits it locally. You can create up to 40 parts. The opening arrangement is an even two-way split. Move pages until each packet is the set you want, then download. The original file stays on your computer.

Each page goes to one part

A page belongs to a single part. Put page 4 in part 2 and it stays with part 2. Pages you never assign are left out of the downloads, which is useful when a cover or a blank sheet should stay behind. You get one PDF per part, named with the part number and the page range.

Separate downloads, and a server retry

The parts download as separate files, each named with its part number and page range. If the local split fails, the page retries on the server, and that path accepts 12 MB on the free plan, eight times a day. Merge, rotate, and password tools live on their own pages. This one divides the file.

How it works

1
Add a PDF up to 100 MB
The browser path uses pdf-lib for a PDF at or under 100 MB. You will get separate downloads, one per part. If that local split fails, a server retry uses the free 12 MB and eight-a-day limit.
2
Assign pages to parts
Start from the even two-way split or change the groups. You can make up to 40 parts. Each page goes to one part. Leave a page unassigned when it should stay out of every download.
3
Download each part
Each file name includes the part number and the page range. The downloads are separate PDFs. Open one and confirm the pages before you send that packet on.

Use cases

A packet split into two sends

The default even two-way split divides the PDF into two parts. Download each file, check the page range in the name, and send them separately. The split runs locally up to 100 MB.

Pulling chapters into their own files

Assign each chapter’s pages to its own part, up to 40 parts. Each page goes to one part. Unassigned pages stay out of the downloads. You receive a separate PDF per part.

Dropping a blank page from the send

Leave the blank page unassigned. It stays out of the downloads while the pages you grouped become their own files, named with part numbers and ranges.

Problems we solve

A page showed up in the wrong packet

Each page goes to one part. Move it to the part that should contain it, and leave it unassigned if it should be omitted. Download again and read the page range in the file name.

The browser split failed

The page retries on the server. That server path uses 12 MB and eight runs a day on the free plan. The local path itself accepts a PDF up to 100 MB. You still get separate downloads for the parts that build.

Related guide

Specialized Split PDF guides

Trust & privacy

Local for a PDF up to 100 MB

pdf-lib runs the split in the browser when the file is a PDF at or under 100 MB. Up to 40 parts, each page in one part, separate downloads with the range in the name.

A clear server fallback

If the local split fails, the retry runs on the server at 12 MB and eight a day on the free plan. Merge, rotate, and password prompts belong to other pages. This page divides the PDF.