Clean, simple interface
The source, audio monitoring, auto-stop, and primary action share one screen. Starting a recording does not require technical setup.
Chrome extension · browser tab audio recording
Free tab audio recorder built for long sessions
Pulse is a Chrome audio recorder extension that captures sound from browser tabs without the microphone or system noise. Record webinars, online lectures, podcasts, live streams, and music to WebM, MP3, or WAV — locally and in the background.
Reliable recording
A long browser recording should survive a closed popup or Chrome failure
Pulse does not keep the entire recording in memory until you press Stop. It persists audio to IndexedDB in chunks of about one second, so captured material can be recovered after an unexpected browser shutdown. Close the popup immediately if you want: recording continues in the background.
Why Pulse is different
More than a Record button and one WebM file
Basic tab audio recorder extensions usually focus on one tab and one output format. Pulse records multiple tabs concurrently, keeps even identical URLs as separate sessions, and preserves independent settings for each. Choose WebM, MP3, or WAV before capture: audio is encoded and persisted while recording, avoiding a long conversion wait after you press Stop.
Key advantages
Everything you need is visible before recording
Record without tab playback
Pulse Pro can silence the tab for you while continuing to capture its audio stream.
Multiple tabs at once
Pulse Pro records any number of tabs concurrently. Every source remains a separate session with its own timer and settings.
Delayed start
Start immediately or after a short delay, giving you time to launch a video, live stream, or presentation.
Smart pause
Pulse Pro pauses capture during sustained silence and keeps a pre-roll so returning audio is not clipped.
Auto-stop when you choose
Free includes preset intervals. Pro accepts a precise custom stop time from 1 minute to 24 hours.
Crash-resistant recording
One-second chunks remain in IndexedDB and can be recovered after Chrome closes, crashes, or the computer shuts down unexpectedly.
Choose the format up front
WebM, MP3, or WAV is produced as recording progresses, without a separate long conversion wait after Stop.
Pulse Free and Pulse Pro
Free records one tab. Pro records several at once
Pulse Free handles the essential job: it records tab audio to WebM, MP3, or WAV, keeps recording in the background, and stores files locally. Pro adds parallel capture and more precise controls.
Pulse Pro features
Silent tab recording
Capture a tab without playing its audio through your speakers or headphones.
Record multiple tabs at once
Capture any number of tabs concurrently. Format, monitoring, pause, and smart-pause settings remain independent for every recording.
Smart pause
Pulse skips sustained silence and keeps a short pre-roll so the beginning of returning audio is not clipped.
Filename templates
Build filenames from the tab title, website, date, time, and recording duration.
Maximum recording quality
Record at the maximum 320 kbps bitrate. Pulse Free includes quality settings up to 256 kbps.
Precise auto-stop time
Set a custom automatic stop time from 1 minute to 24 hours. Preset intervals remain available in Free.
Compare plans
What the free version includes
| Feature | Free | Pro |
|---|---|---|
| Record audio from one tab | Yes | Yes |
| WebM, MP3, and WAV | Yes | Yes |
| Background recording and local library | Yes | Yes |
| Recording quality | Up to 256 kbps | Up to 320 kbps |
| Preset auto-stop intervals | Yes | Yes |
| Custom auto-stop time | No | 1 minute to 24 hours |
| Record multiple tabs simultaneously | No | Yes |
| Smart pause and silent recording | No | Yes |
Pulse Free and Pulse Pro
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Use cases
Record the audio you need directly from Chrome
- Webinars, online courses, and lectures
- Podcasts, interviews, and internet radio
- Live streams and long broadcasts
- Several audio sources in different tabs
- Audio from local file:// pages
- Content you own or have permission to record
Under the hood
Manifest V3 with fully local audio processing
Chrome Extension · Manifest V3Tab Capture APIOffscreen DocumentsWeb Audio APIAudioWorkletIndexedDBWebM/Opus · WAV PCM · MP3Service Worker