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.
Six focused tools, zero friction
Each tool does one job exceptionally well — no watermarks, no upload wait, nothing to install.
Audio Studio
Convert & editConvert 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
Voice Recorder
RecordRecord 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
Stem Splitter
Separate stemsSplit 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
Audio Joiner
Merge & mixCombine 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
Audio Splitter
Split & cutCut 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
MP3 Tag Editor
Tags & coverEdit 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
How it works
Three steps — and your audio never leaves your device.
Drop your file
Add an audio file straight from your device. It loads into the browser — nothing is uploaded to a server.
Edit & process
Convert, split into stems, trim, merge, apply effects. Everything runs on your machine for full-quality, private processing.
Download instantly
Export the result in the format you need. No round-trip, no waiting on an upload queue.
Frequently asked questions
Everything you might want to know before dropping in a file.
Are my files uploaded to a server?
No. All processing runs locally in your browser. Your audio never leaves your device, so it stays completely private.
Which formats are supported?
Audio Studio opens common audio files (MP3, WAV, FLAC, OGG, AAC, M4A and more) and the audio track of MP4, MOV, MKV and WEBM videos, and exports MP3, AAC, OGG, WAV or FLAC, several at once as a ZIP if you like. Audio Joiner and Audio Splitter export MP3, WAV, AAC or OGG.
Is there a file size or length limit?
There is no fixed size or length limit. Because everything runs in your browser, the practical limit is your device's memory: very large files use more RAM while processing. On the free plan, Audio Studio converts up to 2 files per batch.
Does it work offline?
Partly. Signing in, loading your daily usage and downloading a tool's processing engine need an internet connection. Once a tool is loaded, the processing itself runs on your device and your audio is never uploaded.
Do I need an account?
Yes — a free account is required to use the tools. It's free to create and takes a moment; every conversion, merge and stem split still runs entirely on your device. The free tier includes a daily allowance, with unlimited use on Pro.