PDF Merger & Splitter
Merge multiple PDFs into one, or pull a page range out of a single PDF into a new one.
No upload, no watermark, no file size limit beyond your device's memory.
Need to turn images into a PDF instead? Use the Image ↔ PDF Converter.
How it works
Merge loads each PDF into pdf-lib, copies all pages into a fresh document in your chosen order, and serialises. Encrypted PDFs are skipped with a notice. Original quality is preserved — pdf-lib copies pages by reference, no re-encoding.
Split parses your page-range syntax (1-3, 5, 7-9), copies the selected pages into one or more new PDFs, and either downloads the single PDF or bundles per-chunk PDFs into a zip.
Both run entirely on your device. pdf-lib (~150 kB) and JSZip (~50 kB) are loaded on demand from cdnjs, only when you first interact with the relevant tab.