HyperFrames is an open-source project from the team at HeyGen. We build deterministic HTML-to-MP4 rendering so developers and AI agents can produce real video the same way they produce everything else: with text, version control, and CI.
Every modern video pipeline still treats the editor as the source of truth. The timeline is in a binary file. The fonts are licensed to one machine. The colors drift between two exports of the same project.
We think that's backwards. HTML and CSS are the most-used layout language on earth, with a 30-year compatibility guarantee. A headless browser will render the same DOM identically on any Linux box from now until forever. That is the substrate for deterministic, agent-authored video — not another GUI.
HyperFrames is the engine. The playground is the demo. The docs are the spec. The GitHub repo is the source.
Previously rendering pipelines at HeyGen. Believes the next video codec is HTML.
Spent a decade in motion graphics tooling. Tired of GUIs that don't diff.
Headless browsers, frame-accurate timelines, and CI batch rendering.
HyperFrames is open-source under MIT, developed and maintained by a small team inside HeyGen. HeyGen ships AI video at scale; we extracted the rendering core, rebuilt it around HTML, and put it on GitHub. Everything is permissively licensed, including the CLI, the renderer, and the integrations for Next.js, Vercel, GitHub Actions, and OpenAI.
Free, open-source, and runs on your own machine in under a minute.