Audio converter
Convert an audio file in your browser. Choose WAV settings, an MP3 bitrate or WebM with Opus when your browser can write it. Your recording stays in this tab.
Drop the audio in, choose its shape, then save the result.
Audio converter is in your dock. Everything you started is still there.
Change the format. Keep the sound.
Decode an audio file in this tab, choose the output settings you need, then save the converted file.
Drop an audio file here
MP3, WAV, M4A, AAC, OGG, Opus, FLAC and AIFF
MP3WAVM4AAACOGGOGA+6
Audio file
Reading the file…
WAV PCM
Choose settings, then prepare the converted audio.
Ready to convert locally.
Choose an output
WAV works in every modern browser. MP3 is compact. WebM uses Opus when this browser exposes a recorder.
Set the audio shape
Changing these values resamples or mixes the decoded audio.
Prepare, listen, save
The result is made only when you ask for it. Your source stays unchanged.
- Output
- Not prepared
- Processing
- In this tab
Audio bytes stay in this browser tab.
What this converter can write
WAV PCM and MP3 are encoded locally. WebM with Opus appears when the browser's MediaRecorder supports it. AAC and FLAC output are not promised because browsers do not expose dependable cross-browser encoders for them.
Audio stays in your browser.Audio stays here. Settings save privately.Saving details
How to convert an audio file
Drop in your audio
Choose an MP3, WAV, M4A, AAC, OGG, Opus, FLAC or AIFF file. The browser decodes it in this tab.
Choose the output settings
Save WAV PCM or MP3 with the settings you need. WebM with Opus appears when your browser can write it.
Listen, then save
Prepare the conversion, check the result and save it. The original stays unchanged on your device.
Pick the format for the next job
WAV is the dependable output for editing because it stores uncompressed PCM. MP3 is the compact choice for sharing. WebM with Opus is smaller again when the receiving app supports it.
| Output | Use it when | Tradeoff |
|---|---|---|
| WAV PCM | You need an uncompressed file for an editor or another browser tool. | Large files. A higher setting cannot recover lost source detail. |
| MP3 | You need a compact file that plays almost everywhere. | Lossy. A higher bitrate preserves more detail but makes a larger file. |
| WebM · Opus | You need a compact web or chat file and your browser shows the option. | Some desktop editors and older players do not open it. |
| AAC or FLAC | You need a specific delivery codec. | Use a desktop encoder or an app that ships that codec. |
What conversion changes
Audio conversion decodes the source to samples and writes a new container. Changing sample rate resamples those samples. Choosing mono averages the source channels. Choosing stereo duplicates a mono source across two channels. None of these operations can restore information the original codec discarded.
The original file remains untouched. The output is a new file with a -converted suffix, and you can listen to it before saving.
Why MP3 bitrate matters
The bitrate is the encoder's budget per second. 128 kb/s makes a smaller spoken-word file. 192 kb/s is a useful general default. 256 or 320 kb/s keeps more music detail at a higher size. The second MP3 pass cannot restore detail lost by the source, so convert from the original when you can.
Size planning
PCM size is predictable. Multiply sample rate by channel count, bytes per sample and seconds. A five-minute stereo WAV at 48,000 Hz and 16-bit is about 57.6 MB before the header. MP3 size is close to bitrate × seconds ÷ 8. Lowering the sample rate or mixing to mono reduces WAV size and changes the audio, so preview the result before you replace an original.
Frequently asked questions
Can I convert MP3 to WAV?
Yes. Drop the MP3 in, choose WAV PCM and prepare the conversion. The browser decodes the MP3 locally and writes uncompressed samples to a new WAV file. Converting to WAV cannot restore detail already removed by MP3.
Can I convert audio to MP3?
Yes. Choose MP3 and a bitrate, then prepare the result. The local LAME encoder writes the file in a worker so the page remains responsive. MP3 is lossy, so keep the original and avoid repeated conversions.
Does the audio upload anywhere?
No. The file is read and decoded in this browser tab. The converter sends no audio bytes, filename or preview to floi. Signed-in settings and numeric activity are separate from the file.
What do sample rate and bit depth change?
Sample rate sets how many samples are stored per second. Bit depth sets the precision of each PCM sample. Higher values make a larger WAV. Converting a lower-quality source to a higher setting does not add detail.
Why is my WAV much larger?
WAV PCM is uncompressed. A 48,000 Hz stereo 16-bit file uses about 192,000 bytes per second before its small header. That is the trade for an edit-friendly file with no further codec loss.
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