Split PDF by File Size

Split Large PDFs into Smaller Files Online for Free

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Drag & drop a PDF file here, or browse

Single PDF file

How It Works

  1. Add a PDF file Drag and drop your PDF file or click to browse. The tool reads the page count and file size instantly.
  2. Set a size limit Enter the maximum file size in MB. The tool will keep each output file under this limit.
  3. Split Click split. The tool estimates page sizes and groups them to stay under your limit.
  4. Download Download each part individually or as a ZIP archive.

Features

Supported Formats

FAQ

How do I split a PDF by file size?

Drop your PDF into the tool, enter the maximum file size in MB, and click Split. The tool measures each page individually and groups them into chunks that stay under your limit.

Is it safe to split PDFs online?

Yes. Most online tools upload your file to a server. Apparatus splits everything in your browser - your PDF is never transmitted anywhere. Safe for client documents, financial reports, and confidential presentations.

Can I split a PDF to fit email attachment limits?

Yes. Most email providers allow 10-25 MB per attachment. Set the limit to match your provider (e.g. 10 MB for most corporate email, 25 MB for Gmail) and the tool splits your PDF into parts that fit.

How accurate is the size estimation?

The tool measures each page individually to estimate sizes. Multi-page PDFs with shared resources (fonts, images) may produce output files smaller than estimated, so results will always be at or under your limit.

What if a single page exceeds the size limit?

If a page is larger than the limit on its own, it will still be included as a single-page PDF. The tool cannot split content within a page.

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