Parcourir les fichiers
or drag and drop it anywhere in this area
No file size limit · minimum 10 seconds · 30+ seconds recommended for analysis
Files stay on your device — no uploads · no account · private processing in this browser tab.
Output settings
Comment ça marche
Your file is decoded with the browser's own audio decoder, so anything your browser can play can be converted: MP3, WAV, OGG/Vorbis, FLAC, M4A/AAC and WebM. The decoded samples are then resampled offline to the sample rate you pick, optionally downmixed to mono, and re-encoded — WAV as 16-bit PCM, MP3 through a JavaScript LAME encoder at your chosen bitrate. Because decoding and encoding both happen in the page, nothing is uploaded and there is no file-size limit beyond your device's memory.
- 01
Upload
Pick a file or drop it in — decoding happens on your device.
- 02
Process
The spectral engine renders the result in this browser tab.
- 03
Download
Preview and save the output as a lossless WAV file.
Which format should you pick?
MP3 is lossy and universally supported. 192 kbps is a good default for listening; 320 kbps is close to transparent for most material; 96–128 kbps suits speech and podcasts.
WAV is uncompressed 16-bit PCM. Use it for editing, mastering, sampling or any step where you will re-encode later, since every lossy encode discards information permanently.
Converting a lossy file to WAV does not restore lost quality — it only stops further loss. Keep 44.1 kHz for music and 48 kHz when the audio will be paired with video.
Spectral engine
Frequency-domain processing tuned for voice and instrument content.
Fast
Rendered locally in this tab — no upload waiting or queue.
Free
Unlimited tracks, no account and no usage limits.
Analysis and separation results are estimates produced by signal processing, not definitive verdicts. Quality depends on the source recording.
Converting audio formats locally
Converting audio is mostly about picking the right trade-off between size and fidelity. WAV stores uncompressed PCM and is the right choice for editing, mastering and archiving. MP3 discards inaudible detail to shrink files by roughly ten times, which is what you want for email, messaging and web playback.
Bitrate controls MP3 quality: 320 kbps is transparent for most listeners, 192 kbps is a sensible middle ground, and 128 kbps is acceptable for speech. Sample rate should normally stay at the source rate — 44.1 kHz for music, 48 kHz for video — and dropping to 22.05 kHz only makes sense for voice recordings where size matters more than bandwidth.
Everything is decoded and re-encoded in the page, so a batch of files never leaves your device and there is no queue or file-size cap beyond available memory.
How to use the audio converter
- 01Add one or more files in any format your browser can decode.
- 02Choose the output format, bitrate and sample rate.
- 03Optionally downmix to mono to halve the size of speech recordings.
- 04Convert and download the results.
Frequently asked questions
No. Detail removed by the original MP3 encoder is gone; the WAV simply stops any further loss from happening in later edits.
320 kbps for music you care about, 192 kbps for general listening, 128 kbps or lower for voice.
Yes, batches are processed one after another in the browser.