Stemly Convert — Mac & iOS

Convert audio.
Keep every folder.

Batch audio converter for Mac and iPhone/iPad. Drop files or folders, pick your format — WAV, M4A, AIFF or FLAC — Stemly Convert processes everything while preserving your original folder structure.

4 Output Formats
∞ Files at Once
100% Offline
Stemly Convert app screenshot
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Folder Structure Preserved

Sub-folders, naming and organisation stay exactly as they are. Just converted.

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WAV, M4A, AIFF, FLAC

Lossless or compressed — you choose per conversion. MP3 supported as input.

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Quality Control

Pick sample rate (44.1 / 48 / 96 kHz) and bit depth (16 / 24-bit) for WAV and AIFF. Bitrate for M4A.

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100% Offline

No cloud, no account, no uploads. Everything stays on your device.

Four output formats

From compressed M4A for streaming to lossless FLAC for archiving — convert to exactly what you need.

Most Used

WAV

Lossless — universal
  • 16-bit or 24-bit
  • 44.1 / 48 / 96 kHz
  • Works with every DAW
  • Best for Stemly stems
Streaming

M4A (AAC)

Compressed — Apple ecosystem
  • 128 / 192 / 256 kbps
  • Native Apple format
  • Plays on every Apple device
Lossless

AIFF

Lossless — 24-bit
  • Zero quality loss
  • 16-bit or 24-bit
  • Standard for Pro Tools & Logic
Lossless

FLAC

Lossless — compressed
  • Zero quality loss
  • Smaller than AIFF/WAV
  • Universal archiving format

Three steps. Done.

No setup, no configuration. Just convert.

1

Drop files or folders

Drag audio files or entire folder trees into the app

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2

Pick format & quality

Choose output format, sample rate, bit depth and output folder

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3

Convert

All files processed at once, folder structure preserved

Mac & iOS — one-time purchase

No subscription. No account required. Available on the App Store.

Mac

Stemly Convert

macOS 13 Ventura or later
  • WAV, M4A, AIFF, FLAC output
  • Batch conversion with drag & drop
  • Folder structure preserved
  • Sample rate & bit depth control
  • 100% offline
$1.99
One-time purchase — no subscription
App Store →
iPhone & iPad

Stemly Convert

iOS 16 or later
  • WAV, M4A, AIFF, FLAC output
  • Import from Files, iCloud Drive
  • Folder structure preserved
  • Sample rate & bit depth control
  • 100% offline
$1.99
One-time purchase — no subscription
App Store →

🔒 Everything stays on your device

Stemly Convert converts locally using built-in system tools. No audio is ever sent anywhere.

✓ No cloud uploads
✓ No internet required
✓ No account needed
✓ No telemetry
Mac: macOS 13 Ventura or later • Apple Silicon or Intel  •  iOS: iPhone or iPad, iOS 16 or later