WAV to MP3 Converter

Turn large WAV recordings into MP3 files a fraction of the size. Everything runs on your device, so there is no upload wait and no size limit.

  • 100% private
  • No sign-up
  • No watermark
  • Unlimited files
Drop a WAV file hereor tap to browse · one file at a time · nothing is uploaded

    The converter is a one-time download of about 10 MB, which is why it isn't fetched until you ask for it. After that it stays cached. Everything runs on your device — the file is never uploaded, and conversion speed depends on your computer rather than a server.

    Where the size saving comes from

    WAV stores audio uncompressed — every sample, exactly as recorded. CD-quality stereo works out at about 10 MB per minute, so an hour-long recording is roughly 600 MB. That is why WAV files are awkward to email, upload or keep on a phone.

    MP3 discards information the ear is unlikely to notice: frequencies masked by louder sounds, detail above the range of most listeners. At 192 kbps the same hour becomes about 86 MB — around a seventh of the size — and most people cannot tell the difference on ordinary equipment.

    When to keep the WAV

    If the file is a master, a multitrack stem or anything you intend to edit further, keep the WAV. Every edit-and-re-export cycle on a lossy file compounds the loss, and effects like heavy compression or pitch shifting expose artefacts that were inaudible before.

    Convert to MP3 for the finished thing — the version you send, upload or listen to. Treat it as an output format rather than a storage format, and keep the WAV somewhere if you have the room.

    Choosing a bitrate for a recording

    For music, 320 kbps is the safe choice and 192 kbps is the sensible one. For voice — interviews, meetings, lectures, dictation — 128 kbps is ample and produces a much smaller file.

    The saving is not subtle at the low end. A one-hour voice recording is roughly 600 MB as WAV and about 57 MB at 128 kbps MP3, which is the difference between a file you cannot email and one you can.

    Frequently asked questions

    Are my files uploaded to a server?

    No. The conversion runs inside your browser using your device's own processor. Your files are never transmitted anywhere, which is why the tool works even if you disconnect from the internet after the page loads.

    How much smaller will the file be?

    Around 85–90% smaller at typical settings. A 100 MB WAV usually lands between 9 MB and 15 MB depending on the bitrate you pick.

    Can I convert back to WAV afterwards?

    You can produce a WAV file from the MP3, but it will not restore the discarded detail — it will simply be an uncompressed copy of the compressed audio, at full WAV size. Keep the original if you may need it.

    Is there a length limit?

    No fixed limit, though very long files use a lot of memory because the whole thing is processed in the browser. Multi-hour recordings are better handled on a computer than a phone.

    Is there a file limit or a paywall?

    There is no account, no watermark, and no upload cap. Because your device does the work, the only practical limit is your available memory. The site is funded by ads, not subscriptions.

    Further reading

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