Are my audio files uploaded to a server?
No. The conversion engine runs as WebAssembly inside your browser, so your stems, mixes, and recordings stay local.
New — browser audio conversion, no uploads
Audio Converter
Browser-based audio converter for MP3, WAV, FLAC, and OGG. Dial in bitrate, sample rate, channels, and loudness without sending audio to a server.
Privacy-first: stays localPowered by a WASM audio engineOne-time load, then fast
Private — runs in your browser
WASM audio engine, one-time load
First conversion downloads the engine (about 30 MB)
Built for clean handoffs
Export podcast episodes, interviews, stems, or reference tracks straight from the browser. The WASM audio core stays cached in this tab, so repeat exports feel instant.
- Export MP3 for universal playback or OGG for lean web audio.
- Keep masters as WAV/PCM or FLAC when you want lossless files.
- Choose mono or stereo, adjust bitrate, and pick the right sample rate for your platform.
- Normalize loudness to EBU R128 targets for consistent delivery.
Practical presets that work
- Podcasts: MP3, 128–160 kbps, mono, 44.1 kHz, normalization on.
- Voiceovers: OGG, 96–128 kbps, mono, 24 kHz for small files.
- Mix reviews: MP3, 192–256 kbps, stereo, 44.1 kHz.
- Stems and masters: FLAC or WAV, stereo, 48 kHz, no normalization.
Preload the engine before exporting a batch to avoid waiting during handoff.
Frequently asked questions
Which formats can I export?
MP3 (LAME), WAV (PCM), FLAC (lossless), and OGG (Vorbis). Choose the format that matches your handoff or platform.
Can I control bitrate, sample rate, and channels?
Yes. Pick the target bitrate, sample rate (48k, 44.1k, 32k, 24k, or 16k), and mono or stereo output. You can also normalize loudness to EBU R128.
Does it work offline after the first load?
After the engine is cached (about 30 MB on first use), conversions run offline in this tab without sending audio anywhere.