Browser compatibility
Check capture, encoding and directory writing separately.
On this page
Long recording needs all three capabilities together: media capture, MediaRecorder encoding and showDirectoryPicker with writable files. A browser that can capture a screen but cannot write to a selected directory cannot start this recorder.
How to use it
- Use HTTPS or localhost. Recent desktop Chrome and Edge are the main intended environments, subject to permissions and actual API checks.
- Open the app and check its compatibility notice. For audio only, microphone access is required unless a live shared-audio track is available.
- Test the exact browser, OS and source. Check microphone, shared audio and output playback before relying on a long session.
Limits and safety
Do not assume mobile Safari, Firefox, an embedded browser, or every Chromium variant supports this workflow. Screen capture and shared audio have additional restrictions. No full-recording in-memory download fallback is offered; using a native recorder may be more appropriate on unsupported devices.