Split PDF

Divide a PDF into smaller files — by custom page ranges, or one file per page. Everything runs in your browser.

Split your PDF

Add a PDF file, choose your split points, then split.

Drag & drop a PDF file here, or click to browse
Choose a single PDF to split into multiple files.

    Split files ready

    Output files
    0
    Total pages
    0
    Total size
    0 B
    Your files are processed locally in this browser tab using JavaScript. They are never uploaded to Calcooo or any server.

    How to use this tool

    1. Drag and drop your PDF file into the box above, or click to browse and select it.
    2. Optionally enter comma-separated split points, or leave the field blank to get one file per page.
    3. Press Split PDF to divide the file into the pieces you specified.
    4. Click Download to save the result — a single PDF, or a ZIP if there's more than one file.

    FAQ

    Frequently asked questions

    Is my PDF uploaded anywhere?

    No. All processing happens locally in your browser using pdf-lib. Your file is never uploaded to Calcooo or any server.

    How do I choose where to split?

    Enter comma-separated page numbers marking the end of each chunk, e.g. "3,7" on a 10-page PDF creates pages 1-3, 4-7, 8-10. Leave the field blank to split every page into its own file.

    What do I get back?

    If the split results in a single file, you get a direct PDF download. Otherwise you get a ZIP archive containing each split PDF.

    Does splitting affect quality?

    No. Pages are copied as-is, so text, images and formatting stay exactly as they were in the original file.