The Offline PDF Merger allows you to merge PDF files directly in your browser without uploading them anywhere.
It uses the Rust crate lopdf, compiled to WebAssembly.
Try it here: https://pdfmerge.mhh.dev/
- Build the WebAssembly files:
wasm-pack build --target web
- Serve the files with any HTTP server, for example:
python3 -m http.server