Drop Audio Files to Mix
MP3, WAV, FLAC, OGG
Just stitching clips end to end? Use the Audio Joiner instead.
Free Online Audio Mixer — Layer & Overlay Tracks
An online audio mixer lets you layer several audio tracks so they play at the same time and balance their levels — like a mixing console, but in your browser. Drop your files onto the timeline and they stack at the start, playing simultaneously. Drag any track to offset it, drag the handles to fade, and set each track's volume so nothing buries anything else. Everything runs locally on Windows, Mac, Linux, or Chromebook — no upload, no signup, no watermark.
How Do I Play Two Audio Files at the Same Time?
Drop both files into the mixer. Unlike a joiner, which plays clips one after another, the mixer overlaps them so they play together. Use the per-track volume sliders to balance the two, drag either track along the timeline to line them up, and press Play to hear the blend before you export a single combined file.
Add Background Music to a Voiceover
Load your voiceover and a music bed, then hit the “Voice over music” preset — it keeps the voice at full level and ducks the music underneath. Fine-tune with the per-track sliders, fade the music in and out at the edges, and export. Ideal for YouTube narration, explainer videos, presentations, and podcast segments.
Stack a Vocal Over an Instrumental (Mashups)
Layer an a cappella over an instrumental to build a mashup or remix. Nudge the vocal along the timeline until it lines up with the beat, balance the two levels, and render a single track. The same workflow layers sound effects or a music sting under dialogue.
Balance Tracks Recorded at Different Levels
When you mix a quiet lav-mic voice with a loud music file, per-track volume fixes it. Pull the loud track down, bring the quiet one up, and preview until the mix sits right — then export as MP3, WAV, FLAC, or OGG.
Layered Timeline
Tracks stack and play together. Drag to offset, drag handles to fade — a mixing console in your browser.Per-Track Volume
Balance every track independently. One-click “voice over music” preset ducks the bed under your voice.Runs Locally
Mix on your phone, tablet, Chromebook, or desktop. Nothing is uploaded — your audio stays on your device.Frequently Asked Questions
An online audio mixer lets you layer multiple audio tracks so they play at the same time and balance their levels — like a mixing console in your browser. cut.audio's mixer overlaps clips, gives each one its own volume, and exports a single combined file, all locally with no upload.
Drop both files into the mixer. They stack at the start of the timeline and play together. Use the per-track volume sliders to balance them and drag either track to line it up, then Play to preview and Export to render one file.
Load the voiceover and the music track, then use the “Voice over music” preset — it keeps the voice at 0 dB and ducks the music to about 30%. Adjust the sliders to taste, fade the music at the edges, and export.
The mixer layers tracks so they play simultaneously (voice + music, vocal + instrumental). The joiner concatenates files end to end into one continuous track (podcast segments, audiobook chapters). Use whichever matches your job — they share the same export engine.
Up to 10 tracks at once, each with independent volume, fade-in, fade-out, and timeline position.
Yes. No signup, no watermark, no file size limit. Audio is processed locally in your browser — nothing is uploaded to any server.