Voice Recorder
Record voice notes, interviews and lectures, safely saved in your browser as you go.
Recorder
Ready0:00.0
The input clipped (it was too loud for a moment). Move back from the microphone or lower its volume in your system settings.
Microphone settings
For speech, noise suppression and auto gain help in noisy rooms; echo cancellation only matters when speakers play at the same time. For music or a clean studio recording, turn all three off.
Your recordings
No recordings yet. Press Record: each take is saved in this browser as you record, so a reload does not lose it.
About the Voice Recorder
Record from any microphone your browser can use, with a live level meter and waveform so you can see you are being picked up, pause and resume, and switches for the browser’s echo cancellation, noise suppression and auto gain. Every recording is saved in your browser (IndexedDB) while you record, a second at a time, so reloading the page or an accidental close does not lose it.
Play takes back, give them names, and download them as MP3, M4A (AAC), Opus or WAV. The sound never leaves your device: recording, storage and encoding all happen in the browser.
How to use it
- Press Record and allow microphone access when the browser asks. (Use Test microphone first to check the level without recording.)
- Speak: the timer runs and the meter shows your level. Use Pause and Resume as needed.
- Press Stop and save. The take appears under Your recordings with its length and waveform.
- Rename it if you like, press Play to listen, choose an Export format and press Download.
Examples
Record 2 minutes with the default settings
A take of 2:00 · 48 kHz · mono · 11 MB stored; Download MP3 at 128 kbps gives about 1.8 MB
Noise suppression and auto gain on, echo cancellation off
Steady background noise is reduced and quiet and loud voices are evened out
All three processing switches off, stereo microphone
The natural sound of the room and instrument, without the voice-call processing that can make music sound strange
How your recordings are kept
The microphone is captured with an AudioWorklet, which runs on the browser’s audio thread and does not drop sound when the page is busy or in the background. Every second, the recorded sound is written to IndexedDB as 16-bit PCM — the same uncompressed audio as a CD — together with the take’s details. If the page is closed during a recording, the take is marked Recovered on your next visit with everything up to the last saved second.
Uncompressed mono at 48 kHz takes about 5.5 MB per minute (stereo twice that). Takes stay until you delete them or the browser clears the site’s data. Safari deletes a site’s saved data after 7 days without a visit unless the site is added to the Home Screen, and any browser may clear data when the device runs out of space — so download what you want to keep.
Choosing an export format
- MP3 plays everywhere; 64–128 kbps is plenty for speech.
- M4A (AAC) is smaller for the same quality and native on Apple devices.
- Opus is the most efficient: 24–48 kbps already sounds clear for speech.
- WAV is the stored sound unchanged, for editing; it downloads instantly and needs no encoder.
Each download carries the recording’s name as its title and the recording date. WAV keeps them as RIFF INFO tags, which hold Western European letters only, so a name in another script is left out of a WAV file (the page says so). If a take’s sample rate does not allow the chosen bitrate (MP3 at 16 kHz goes up to 160 kbps, for example), the nearest one is used and the page tells you.
The processing switches
These are the browser’s own audio processing options from the W3C Media Capture and Streams standard. Noise suppression reduces steady noise such as fans; auto gain control evens out loud and quiet speech; echo cancellation removes sound from your speakers that the microphone picks up (useful only when something is playing). The defaults suit speech; for music, turn all three off. Some browsers or devices keep a switch on regardless; the Microphone Test shows what your browser really applies.
Limitations
- The page must stay open while recording. Phones may stop recording when the screen locks or you switch apps; the take is saved up to that point.
- Recordings are stored only in this browser on this device; another browser or device will not see them.
- There is no editing (trimming or cutting) on this page; export as WAV for an audio editor.
- In private windows some browsers do not allow saving, so takes are kept only until the page is closed (the page warns you).
Privacy
Everything happens in your browser. What you enter or open here is not uploaded or stored by MySmartCoPilot. Recording and WAV downloads work without a connection. The MP3, M4A and Opus encoders download from MySmartCoPilot the first time you export in those formats. Your recordings are never uploaded.
Frequently asked questions
Are my recordings uploaded anywhere?
No. They are recorded, stored and encoded in your browser and saved to your device when you download them. MySmartCoPilot never receives the audio.
What happens if I close the tab while recording?
The take is saved every second, so you lose at most the last second. When you open the page again it is listed as Recovered.
How long can I record?
As long as the browser lets the site store data — usually many hours. Mono at 48 kHz uses about 5.5 MB per minute; the page shows how much is stored and how much space is left.
Which format should I download?
MP3 for sharing and older devices, M4A for Apple devices, Opus for the smallest files, WAV for editing. For speech, MP3 at 64–128 kbps or Opus at 24–48 kbps is enough.
Why does my recording sound processed or robotic?
Noise suppression and echo cancellation are designed for calls. Open Microphone settings, switch them off and record again.
Can I record on my phone?
Yes, in current mobile browsers. Keep the screen on and the page open while you record: phones may pause pages in the background.