# Split PDF By File Size

Break down large PDFs into smaller files. Use the 'Every N pages' option to control document size.

Live page: [https://freetoolsfr.com/split-pdf-by-file-size](https://freetoolsfr.com/split-pdf-by-file-size)

Some PDFs are simply too heavy to send. Your email provider rejects anything over 25MB, a client portal caps uploads at 10MB, and a 90MB scanned contract bounces back every time. Splitting by file size solves this by breaking one oversized PDF into a sequence of smaller files that each stay under the limit you set. Instead of guessing which pages to cut, you choose a target — say 8MB per part — and the document is divided into as many chunks as it takes to respect that ceiling, with every page landing intact in one part or the next. A 90MB scan might come out as five files of roughly 18MB, or a dozen tighter pieces if you need to clear a stricter cap. Because the whole thing runs in your browser, even a confidential file never leaves your machine while it is being measured and divided.

## How it works

1. **Upload PDF** — Select or drag and drop the PDF file you want to split
2. **Choose Method** — Select how to split: by page range, specific pages, or every N pages
3. **Download Results** — Get your split PDFs as individual files or in a convenient ZIP archive

## Use cases

- **Email Attachments**: Break a 60MB proposal into parts that clear a 25MB inbox limit without bouncing.
- **Portal Uploads**: Fit a heavy scanned submission under a 10MB government or court filing cap.
- **Slow Connections**: Send a large manual in smaller pieces that upload reliably over weak rural internet.
- **Storage Quotas**: Divide an archive PDF to fit the per-file ceiling of a document management system.

## Tips

- **Match the Cap, Then Subtract**: If the limit is 25MB, target around 20MB per part so headers and email encoding don't push a chunk over the edge.
- **Scans Run Large**: Image-heavy scans weigh far more per page than text PDFs, so expect more parts from the same page count.
- **Number the Parts**: Keep the part-1, part-2 order when you send them so the recipient can reassemble the document in sequence.
- **Compress First If You Can**: If the goal is one attachment, try shrinking the PDF before splitting — you may avoid breaking it up at all.

## FAQ

### How does splitting by file size decide where to cut?

It adds pages to a part until the next page would push it past your size target, then starts a new part — so no page is ever split in half.

### Can I set an exact size like 5MB?

You set a maximum target. Each part stays at or under it; the final part is usually smaller because it holds whatever pages are left.

### Why did my scanned PDF make so many files?

Scanned pages are stored as images and weigh much more than text, so a low size cap on a scan naturally produces more parts.

### Is the quality of each part the same as the original?

Yes. Pages are copied as-is into each part with no recompression, so a 20MB chunk looks identical to those pages in the source file.

## Problems solved

- Attachments rejected for exceeding email limits
- Uploads blocked by portal size caps
- Heavy scans that won't send over slow connections
- Files too big for a storage quota

## Stats

- **Under any cap** email or upload limits
- **Auto-chunked** as many parts as needed
- **In-browser** large files stay private

## Tool

This page is powered by the [split-pdf](https://freetoolsfr.com/pdf/split) tool.

## Related

- [split-pdf-files](https://freetoolsfr.com/split-pdf-files)
- [extract-pages-from-pdf](https://freetoolsfr.com/extract-pages-from-pdf)
- [split-pdf-by-bookmarks](https://freetoolsfr.com/split-pdf-by-bookmarks)
- [split-pdf-every-n-pages](https://freetoolsfr.com/split-pdf-every-n-pages)
- [split-pdf-by-interval](https://freetoolsfr.com/split-pdf-by-interval)
- [select-specific-pages](https://freetoolsfr.com/select-specific-pages)

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Source: https://freetoolsfr.com/split-pdf-by-file-size
Site: https://freetoolsfr.com