Any file. Any shape.

How Moyang works

What is Moyang

Moyang is a collection of free file tools — image converters, PDF utilities and developer formatters — that run entirely in your browser. There is no server-side processing: the site is static, and every conversion happens on your device.

That single architectural decision explains everything else about the site. Server-based converters impose daily limits, file-size caps and queues because every conversion costs them CPU and bandwidth. Moyang's conversions cost nothing, so there are no limits to impose — no sign-up, no quotas, no queue, and your files are never uploaded anywhere.

How your files stay private

When you drop a file onto a tool, it is read into memory by your browser and handed to a Web Worker — a background thread on your own machine. Format decoding and encoding is done by open-source codecs compiled to WebAssembly (the same libraries used by native apps), running locally. The result is assembled in memory and offered back to you as a download. At no point does the file, its name, or its contents leave your device.

Verify it yourself

You don't have to take our word for it — this is checkable in under a minute:

  1. Open your browser's developer tools (F12) and switch to the Network tab.
  2. Convert any file with any tool on this site.
  3. Watch the request list: you'll see the page's own assets loading (scripts, styles, the codec for the tool) — and zero outgoing requests carrying your file.

Or try the blunter test: load a tool page, disconnect from the internet entirely, and convert a file. It works, because nothing about the conversion needs a network.

The stack

Moyang is a statically generated Nuxt site. The heavy lifting is done by excellent open-source projects: pdf-lib for PDF manipulation, pdf.js for PDF rendering, jSquash (mozjpeg/oxipng) for image encoding, libheif for HEIC decoding, and others. We're grateful to their maintainers.

Contact

Missing a tool, found a bug, or need a custom private file tool built — including desktop versions that handle whole folders and multi-gigabyte files? or email us directly.