Choose the right output
Use MP3 or AAC for broad playback support, FLAC for lossless storage, WAV for editing workflows, and OGG or OPUS when an open, efficient codec fits your destination.
PRIVATE AUDIO CONVERTER
Convert audio without uploading it.
Change MP3, WAV, FLAC, AAC, M4A, OGG and OPUS files directly in your browser. Trim clips, choose quality and normalize loudness while the source stays on your device.
MP3WAVFLACAACM4AOGGOPUS
Open the converter →＋
Choose your files
They stay on this device.
01 · ADD02 · CHOOSE03 · CONVERT
- 01
Choose one or more audio files.
- 02
Select a format, quality, sample rate and channel layout.
- 03
Convert locally, compare the result and download it.
Make controlled changes
Trim the same range across a batch, convert stereo to mono, preserve the original sample rate or normalize speech and podcast audio to a consistent target.
Keep sensitive audio private
Recordings, interviews and works in progress are processed with WebAssembly on your device. SoundToStory does not receive the media or its filename.
LOCAL PROCESSING
The media does not take a round trip through our servers.
Account and quota requests are separate from the conversion itself. SoundToStory stores plan and daily usage information, but not media files, filenames or converted output.
Review the privacy details →COMMON QUESTIONS
Before you convert.
Is SoundToStory an online upload converter?+
No. The converter runs in your browser and the selected audio does not upload to SoundToStory or a conversion server.
Which format should I use for editing?+
WAV is widely supported by editors and avoids another lossy encoding step. FLAC is useful for smaller lossless archives.
Can I trim and normalize audio?+
Yes. The advanced tools include start and end times, channel selection, sample rate controls and optional loudness normalization.
Ready to change the format?
Use the private conversion workspace in your browser.
Start converting →