Convert WAV audio recordings to MP3
WAV is the format recorders and editors produce, and it is enormous — roughly ten megabytes per minute of stereo audio. MP3 is a fraction of the size and plays everywhere.
This turns WAV into a smaller file that plays everywhere. To go the other way — MP3, M4A or FLAC into WAV — use the Audio Converter; to shrink a file you already have, use the Audio Compressor.
How it works
Choose your WAV file
The recording is opened from your device and never leaves it.
Pick a bitrate
320 kbps is the highest quality MP3; 192 kbps is indistinguishable for most listening and half the size.
Convert
The audio is encoded on your device — no server is involved at any point.
The track is opened, not sent
Editing audio normally means uploading the file and hoping the service is trustworthy. Here your browser opens the track from your disk, works on it in place, and saves the result back. The audio never crosses the network.
- Opened from your disk by your browser — not sent anywhere first.
- Held in the tab while the tool works, then dropped.
- Saved to your device by your browser, not by a link to a server.
- Closing the tab clears the working copy completely.
- No account, so nothing is ever attached to an identity.
- No tracking of what you worked on or what was inside the file.
There is no queue, no render farm and no waiting room. The track is worked on in front of you and released the moment the tab closes. The how it works page covers what actually happens inside the tab, and our DevTools guide shows how to confirm 0 bytes are uploaded.
What people use it for
Sending a voice note that is too long
A ten-minute recording is a lot to ask someone to play. Trim it to the useful minute and it actually gets heard.
Fitting an episode inside a feed limit
Podcast hosts set a maximum size. Checking the result here saves a failed upload later.
Keeping a copy that will still open in ten years
A widely supported format is a safer long-term bet than a container only one app understands.
Formats & limits
What this tool accepts, what it produces, and what it will never ask you for.
- Input
- Uncompressed WAV audio recordings
- Output
- MP3
- Maximum file size
- Set by your device, not by a plan
- Files per run
- One at a time
- Sign-up required
- None
- Watermark
- Never added
- Works offline
- Yes, once the page has loaded
- Supported browsers
- Any current Chrome, Edge, Firefox or Safari
When something goes wrong
Corrupt files, and formats outside the list above, stop with a plain message rather than a spinner that never finishes. If a track plays in your music app it will normally open here.
The audio container is not one the browser can read. Convert it to MP3 or WAV first, then run it through again.
Why not an upload site
An upload-based audio editor sends your recording to a server and sends the result back. Removing that round trip removes the waiting, the caps and the copy of your file.
A typical upload site
This tool
Questions
Which bitrate should I choose?
320 kbps is the highest quality MP3 available and is the safe choice for music you intend to keep. 192 kbps is indistinguishable from the original for most people on most playback equipment, and produces a file roughly half the size. Speech recordings are fine at 128 kbps.
How much smaller will the file be?
Typically around ten times smaller. A stereo WAV runs at about ten megabytes per minute; the same audio as a 192 kbps MP3 is roughly 1.4 megabytes per minute.
Does converting to MP3 lose quality?
Yes, MP3 is a lossy format — that is how it achieves the size reduction. At 192 kbps and above the difference is inaudible to most listeners. Keep the WAV if you plan to master or re-edit the recording later.
Is my recording uploaded anywhere?
No. The audio is decoded and encoded inside this browser tab. No request containing your file is made, so there is nothing to intercept and nothing stored on a server.
Is there a file size limit?
No fixed limit is imposed by the tool. The practical ceiling is how much memory your device has free, because the whole job runs inside this browser tab.
Does it work without an internet connection?
Yes, once the page has loaded. Nothing is fetched while you work, so a dropped connection does not interrupt a run.