DefyAudio
100% private — files never leave your device

Pro audio tools that run entirely in your browser

Convert, edit, merge and split audio into stems — with studio-grade control, processed locally, no uploads.

Open Audio Studio
No server round-trips — instant, offline-capable processing

Six focused tools, zero friction

Each tool does one job exceptionally well — no watermarks, no upload wait, nothing to install.

Audio Studio

Convert & edit

Convert between MP3, WAV, FLAC, AAC and OGG, then shape the sound: trim, fade, speed, 10-band EQ, loudness normalization, 8D spatial, noise reduction and metadata.

  • Multi-format export
  • 10-band equalizer
  • Loudness / LUFS analysis
Open tool

Voice Recorder

Record

Record your voice or any audio straight from your microphone. Preview the waveform, download as WAV or MP3, or send it to Audio Studio to trim and add effects.

  • One-click mic recording
  • WAV & MP3 export
  • Edit in Audio Studio
Open tool

Stem Splitter

Separate stems

Split any song into separate stems — vocals, drums, bass and other — with on-device AI. Extract acapellas or instrumentals without uploading a thing.

  • 2 or 4 stems
  • On-device AI separation
  • High-quality WAV export
Open tool

Audio Joiner

Merge & mix

Combine multiple tracks on a visual timeline. Reorder, trim per-clip, crossfade or add silence between tracks, or layer them together in mix mode.

  • Drag-and-drop timeline
  • Crossfade & silence
  • Sequential or mix mode
Open tool

Audio Splitter

Split & cut

Cut one file into multiple tracks — automatically at silences or with manual markers on the waveform. Export each segment separately or grab them all as a zip.

  • Auto split by silence
  • Manual cut markers
  • MP3 / WAV / AAC / OGG
Open tool

MP3 Tag Editor

Tags & cover

Edit title, artist, album and more, and add album art — for MP3, M4A, FLAC, OGG and WAV. Tag one file or a whole batch. Lossless: tags are rewritten without re-encoding.

  • Add & replace album art
  • Batch tag editing
  • Lossless, no re-encode
Open tool

How it works

Three steps — and your audio never leaves your device.

1

Drop your file

Add an audio file straight from your device. It loads into the browser — nothing is uploaded to a server.

2

Edit & process

Convert, split into stems, trim, merge, apply effects. Everything runs on your machine for full-quality, private processing.

3

Download instantly

Export the result in the format you need. No round-trip, no waiting on an upload queue.

Private by design — no server uploads, no file storage, no tracking of your audio.

Frequently asked questions

Everything you might want to know before dropping in a file.