Orbit

I built Orbit because I did not trust the web for something as simple as merging a PDF. Most online PDF tools upload your file to their server first, and when a document is sensitive that is a real problem: you have no idea whether it is stored, trained on, or leaked. So I built the opposite, a PDF toolkit that does everything on your own device and never uploads a thing.

The constraints were simple from day one: lightweight, private, and offline. Heavy operations like compression run on WebAssembly, so they are fast without a server. It works in the browser, installs as a PWA on mobile with offline caching, and ships as a Tauri desktop app for anyone who would rather have it as a real app. Nothing here is groundbreaking. It is convenience done properly: a clean UI, sane defaults, and your files staying yours.

✨ Why Orbit?

• 🔒 Private by default: Everything runs locally in your browser's sandbox. No uploads, no server, no telemetry on your documents.
• ⚡ Fast: The heavy lifting runs on a WebAssembly engine, so processing feels desktop-class.
• 📱 Works offline: Fully functional with no connection. Install it as a PWA on mobile, or grab the Tauri desktop build.
• ♾️ No limits: No daily quotas, no file size caps, and no subscriptions. Batch as much as your machine can handle.

🛠️ Essential Tools

🚀 Tech Stack

Orbit is built with:

• Frontend: Svelte 5 (Runes), SvelteKit
• Styling: Tailwind CSS 4.0
• PDF Core: pdf-lib, pdfjs-dist
• WASM Engine: @neslinesli93/qpdf-wasm
• Icons: Lucide Svelte
• Linting: Biome

🤝 Contributing

Orbit is open source. If you have an idea for a tool or a feature, feel free to open an issue or a pull request on GitHub.