Privacy and capture limits.
The converter processes imported HTML and local audio in your browser. It has no account system, ads, content uploads, or application analytics.
What stays local
HTML source, decoded audio, preview frames, and generated video remain in memory during your session. The application does not send them to its server, an analytics service, or an error reporting service, and does not store them in localStorage. Reloading or closing the editor clears the session; files you choose to download remain on your device.
What can make network requests
Your browser downloads the application, local fonts, and public examples from our server. If you enable external resources, your imported HTML can connect to third parties for assets and scripts. The hosting infrastructure may log ordinary page requests, including connection metadata; those requests do not contain your imported HTML or audio payloads.
Imported HTML is active code
The preview and playback tab use an opaque-origin sandboxed iframe without permission to access the application DOM, storage, or cookies. External asset requests are blocked by default. This is not complete isolation for malicious code: source HTML can attempt iframe self-navigation or excessive CPU use. Import only code you trust.
Recording permissions and browser support
Canvas capture contains no original audio. Tab recording requires your browser's screen-sharing dialog and the correct playback tab. Keep and Mix require an actual shared audio track. The application cannot guarantee that your browser or operating system supports tab audio.
Recording is real time. Heavy animation or background-tab throttling can affect frame rate and synchronization. MP4, AAC, and WebM support depend on your browser and settings. Unsupported output combinations are hidden.
Current limits
HTML: 5 MB. Local audio: 50 MB and 10 minutes. Video: 60 seconds, up to 1920 pixels per edge, up to 1920² pixels, and up to 60 FPS. Output: 256 MB. These are upper limits, not a performance guarantee.