What it does

PDF Splitter cuts a single PDF into one or more output files, with a colour-coded thumbnail preview so you can verify each split before downloading. Single-output splits download as a single PDF; multi-output splits are bundled into a zip.

The three split modes

• Per page — every page becomes its own PDF (1-page PDF × N).
• Custom ranges — comma-separated ranges like 1-3, 7, 12-20 produce three output files.
• Fixed chunks — split every N pages (e.g. chunk size 5 turns a 17-page PDF into four files of 5 / 5 / 5 / 2 pages).

How it works

• The page-set math runs against the loaded document; pdf-lib creates each output PDF by copying the chosen pages into a fresh document.
• The visual preview tints each output's pages with a unique background colour so the split is verifiable at a glance.
• Multi-output downloads are zipped via JSZip in-browser — no upload step.

Limits

• Encrypted PDFs aren't supported.
• OCR / text extraction isn't part of this tool.
• Bookmark-aware splits (split at chapter boundaries) aren't supported yet.
• Range mode scales better than per-page for very large documents — it doesn't render thumbnails for slices the user isn't keeping.

Privacy

Browser-only, like every ChoreCrush tool. Your PDF is loaded into memory, split locally, and downloaded as a blob. Nothing leaves the device.