Convert Audio
Convert Audio changes a track between MP3, WAV, AAC, OGG and FLAC, with optional control over bitrate and sample rate. Turn a WAV into a shareable MP3, or a lossy file into WAV for editing — all converted privately in your browser.
Add your audio file
The file is read by your browser and stays on your device — there is no upload step.
Your audio
The work runs in this tab. Nothing is sent anywhere, and the download is generated locally.
Output —Load audio
How to use Convert Audio
- 01Upload
Add your audio
Drop your file in; the source format is detected.
- 02Customize
Pick a target format
Choose MP3, WAV, AAC, OGG or FLAC, and set bitrate or sample rate if you want.
- 03Process
Convert
Export to save your audio in the new format.
Is converting the right move?
- The player or site will not accept the fileConvert Audio
- It plays, but it is too largeCompress Audio
- It is stereo and does not need to beMono / Stereo
- It is inside a videoExtract Audio
What changes in the conversion
- Lossy to lossy stacks damage
Converting MP3 to AAC decodes the first encoder's guesses and re-guesses them. Always convert from the best source you have, never from an already-compressed copy.
- Lossless to lossy is one-way
WAV or FLAC to MP3 discards detail permanently. Going back to WAV afterwards produces a large file with none of the quality restored.
- Tags may not survive
Artist, album and artwork are stored differently in each format, and some fields have no equivalent in the target.
Which format for which job
| Format | Best for | Avoid when |
|---|---|---|
| MP3 | Universal playback — every device made in thirty years | You are archiving a master, or will re-edit later |
| AAC / M4A | Better quality than MP3 at the same bitrate; Apple ecosystems | A very old player has to read it |
| WAV | Editing masters and handing audio to a studio | Sending by email — it is roughly ten times an MP3 |
| FLAC | Archiving at full quality in about half the space of WAV | The destination device does not list FLAC support |
Supported formats
- MP3
- WAV
- M4A
- OGG
- FLAC
- Maximum file size —
- bounded by your device's memory
- Processed by —
- FFmpeg (WebAssembly), on your device
Your file, and what the page does
Your file is never uploaded. Convert Audio reads it into this browser tab and processes it with FFmpeg compiled to WebAssembly on your own device. There is no upload endpoint in the application and no copy on any server — closing the tab discards it.
That is also why processing takes longer here than on a site that uploads: your device is doing the work rather than a rack of servers. The trade is that the file never leaves it.
What the page does send or fetch
- The processing engine, once
- The first time you use any video or audio tool, the browser downloads the FFmpeg WebAssembly build (~30MB) from the jsDelivr CDN and reuses the cached copy afterwards. That is a file coming to you — no part of your own file is in the request.
- Ads on the page
- The site is funded by advertising, so the page loads Google AdSense. That carries the usual web basics — IP address, browser, referring page — as on any ad-supported site.
- An anonymous usage counter
- When Convert Audio finishes we record that the tool ran, whether it succeeded and how long it took. No file data, no identifier, no cookie.
Your file is not on that list. How this works.
Frequently asked questions
MP3 and AAC are small and play everywhere; WAV and FLAC are lossless but much larger.
Yes — an advanced option lets you set the output sample rate, such as 44100 Hz.
It won't recover detail already lost in a compressed file, but WAV is ideal as an editing master.
Yes — Convert Audio is completely free. There's no account, sign-up, watermark or limit.
No. It runs in any modern browser — Chrome, Edge, Safari, Firefox, Brave — with nothing to download or install.
Not sure converting is what you need?
- Wrong format for the playerConvert Audio
- Right format, too largeCompress Audio
- Too quiet or unevenNormalize Audio
- It is still inside a videoExtract Audio
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