Is my audio uploaded anywhere?
No. Recording, encoding and saving all happen in your browser. Recordings are written to the browser's private storage on your device and stay there until you delete them or clear the site's data.
How do I record the sound my computer is playing?
Choose Add source, then System or tab audio, and pick what to share in the browser's dialog. On Windows and ChromeOS, choose Entire screen and turn on "Also share system audio". On a Mac this needs Chrome 141 or newer on macOS 14.2 or newer, and the browser must be allowed under Screen & System Audio Recording. Anywhere, you can share a single tab with "Also share tab audio" on.
Why can't Firefox or Safari record system audio?
They can share a screen with a page, but not its sound. Only Chrome and Edge on a computer hand the sound over. Microphones and other inputs work in every modern browser, including on phones.
What happens if the browser crashes while I record?
The recording is written to disk about twelve times a second and its header is updated every two seconds. The next time you open the recorder, a take that was cut off is repaired and appears as Recovered, missing at most the last two seconds.
What is pre-roll?
While an input is on, the recorder keeps the last 5, 10 or 30 seconds. When you press Record, the take starts that far back, so the moment that made you reach for the button is in it.
Can I record a microphone and system audio together?
Yes. Add up to four sources: microphones, audio interfaces, virtual cables and shared system or tab audio. Each has its own level and mute. They are mixed into one file, and you can also keep each source as its own WAV for mixing later.
How long can a recording be?
As long as there is space in the browser's storage, which is usually a large share of your free disk. The recorder shows how much time is left at your settings. A WAV cannot pass 4 GB (about 4 hours of 24-bit stereo at 48 kHz), so a longer recording continues in a second file.
Where do markers end up?
In the WAV as cue points, which Audacity, Reaper, Audition and most editors show as markers, and in the MP3 as chapters, which podcast apps and many players show.
Why is the WAV bigger than the MP3?
The WAV is the lossless master: every sample as it was recorded, about 1 GB an hour in 24-bit stereo. The MP3 is a compressed copy, about 86 MB an hour at 192 kbps, made while you record so it is ready the moment you stop.
