Tumult Hype's exports are essentially 3 lines of HTML so it is easy to embed in other documents and output mostly takes the form of JSON animation data and a JavaScript runtime file. It isn't meant to be hand-edited or even read, since we minify heavily to keep file sizes extremely small.

While everything has its tradeoffs, we went with this approach because:

- Our app has a lot of animation and interactivity capabilities not meaningfully expressed through anything but JavaScript. For example, we don't use CSS3 Animations nor transitions because they aren't powerful enough (pausing, synchronization, etc.).

- We have better control over how we express the DOM to the browser. There's plenty of browser bugs or incompatibilities which sometimes require us to on-the-fly change the DOM structure or which properties we are using.

- The user could easily bork the output so it could not be read back in

- No tool will ever produce output that will appease everyone :)

We provide lots of hooks in and outside of the runtime for your own JavaScript and HTML so you can still customize quite a bit.

So it isn't that our output isn't very clean (in fact I'm quite proud of the runtime and how we've been able to add features without increasing bloat); it is that edits are meant to happen from the app itself.