Zro7 is a growing suite of file & network utilities that runs entirely in your browser. No accounts, no servers, no uploads — just powerful open-source engines compiled to WebAssembly and orchestrated with a beautiful interface.
Once loaded, every tool works without a network. Flip on airplane mode — it still runs.
Nothing is uploaded. All processing happens inside this tab, in memory, then downloaded.
Powered by WebAssembly ports of FFmpeg, DuckDB, pdf-lib, libarchive, Tesseract and more.
115 tools spanning PDFs, images, video, audio, data and archives — with more categories on the way.
Every tool follows the same three-step contract — with your files never leaving the tab.
The browser reads it locally into memory. No upload request is ever made.
A WebAssembly engine runs the transformation inside a sandboxed worker.
The output stays in your tab until you save it. Refresh and it's gone.
Battle-tested libraries — compiled to WebAssembly or written in pure JavaScript.
A quick tour of what's inside.
Pick a tool and drop a file. Nothing installs, nothing uploads, nothing tracks you.
Zro7