Built with open source

Split PDF is free and private because it stands on the work of others. Thank you to every project below — please go star them.

Engine

• qpdf (Apache-2.0) — the PDF engine, compiled to WebAssembly, that performs the actual split.

Rendering

• PDF.js (Apache-2.0) — page thumbnails and preview.
• react-pdf (MIT) — React bindings for PDF.js.

Framework

• Astro (MIT) — the static site shell.
• React (MIT) — the interactive tool Island.

UI & styling

• Tailwind CSS (MIT) — utility-first styling.
• Radix UI (MIT) — accessible primitives.
• class-variance-authority (Apache-2.0) — component variants.
• clsx (MIT) — className composition.
• tailwind-merge (MIT) — merging Tailwind classes.

Build toolchain

• Emscripten (MIT / LLVM) — compiles qpdf to WebAssembly.
• zlib (Zlib) — compression, bundled into the engine.
• libjpeg-turbo (BSD-3-Clause) — JPEG support, bundled into the engine.

Full license texts for the components shipped to your browser are in our third-party notices.