SuperDevTools
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Online voice recorder

Nothing is uploaded: the microphone only opens when you click and turns off when you stop, and recordings stay in this page (and on this device only if you tick the box).

Ready to record

00:00,0
Level

Space bar: start or stop. Keep this tab in front while recording.

These three browser filters are tuned for speech. Untick them to record music or an instrument.

Recordings are then stored in this browser, on this device only, and come back on your next visit. Unticking the box deletes them from the device.

Recordings from this session

No recordings yet.

    A voice recorder that runs in your browser

    This online voice recorder turns your laptop, tablet or phone into an audio recorder. Click "Record", speak, click "Stop", and the recording appears in the list, ready to play back, rename or download. A timer and a live level meter show that sound is coming through, and the waveform appears as soon as you stop.

    Use it to record audio online for a voice memo, a lecture, a best man's speech or work presentation rehearsal, singing practice or a trial podcast episode. If you record an interview or a meeting, always ask the people involved for their consent before you start.

    How to use it

    1. Click "Record" and allow the microphone. Access is never requested when the page opens.
    2. Speak. The timer counts in tenths of a second and the "Level" bar moves with your voice. The space bar also starts and stops recording.
    3. "Pause" holds the recording and "Resume" carries on in the same file. Paused time is not included: 1 minute, a 30-second pause, then another minute gives a 2-minute file.
    4. "Stop" ends the recording and turns the microphone off. Under "Recordings from this session", edit the "Name" field, listen with the player, then click "Download" or "Delete".
    5. For a WAV file, drag the two handles on the waveform to cut a silence at the start or a noise at the end, then click "Download as WAV". With the keyboard, the arrow keys move a handle by 0.1 s and Shift + arrow by 1 s. "Keep everything" removes the trim.

    The settings let you pick the "Microphone", the "Recording format" when your browser offers more than one, and three filters that are on by default: "Noise suppression", "Automatic gain control" and "Echo cancellation". They suit speech; untick them for a guitar or a piano, or long notes get squashed.

    webm, ogg, mp4 or wav: which format?

    Your browser records in a compressed format it can produce: webm or ogg (Opus audio, very small for speech) or mp4 (AAC audio, often saved as .m4a). They are small but do not open everywhere.

    WAV is uncompressed: it opens almost anywhere and in every editing program, but it is large. The tool writes it as 16-bit audio at 48,000 Hz. In mono, each second takes 96,000 bytes, about 5.5 MB per minute. Example: a 2 min 45 s speech rehearsal with 5 s trimmed from the start and 10 s from the end leaves 2 min 30 s of audio, which is 14,400,000 bytes, shown as 13.7 MB.

    Tips for clean sound

    • Keep the microphone 6 to 8 inches from your mouth, slightly to the side.
    • Pick a quiet, furnished room: curtains and bookshelves soak up echo.
    • Do not touch the phone or the desk while recording: handling noise is loud.
    • On a phone, keep the tab in front: some mobile browsers cut the microphone in the background. The tool warns you if the tab was hidden and keeps the screen awake when the device allows it.

    Privacy

    Nothing is uploaded: recording, waveform and WAV conversion happen in your browser, with no network request. The microphone opens only when you click and turns off as soon as you stop. By default, recordings disappear when you close the page, which warns you if one has not been downloaded. "Keep on this device" stores them in the browser on this device only; unticking it deletes them.

    Frequently asked questions

    How long can I record?

    There is no set limit; it depends on your device's memory. An hour of speech in webm stays small, but the same hour as mono WAV is 345,600,000 bytes, roughly 330 MB.

    Does the site keep my recordings?

    No. No audio leaves your device. Only the "Keep on this device" box stores them, in your own browser.

    Why won't my file play on another device?

    Some players do not support webm or ogg. Download the WAV version: it is the most widely supported audio format.

    Does trimming change the original file?

    No. The handles only apply to the WAV export. The "Download" button always gives you the full recording.