Merge and mix audio online
Join music or several audio recordings into one file. To play a voice over music, overlap the tracks.
Add files from your device, a link or cloud storage
Add audio or video
FREEYour recording. Your sound.
Drag audio or video here
Choose a recording from your device
MP3, WAV, M4A, FLAC, OGG, AAC, Opus or video · up to 500 MB
Or import from cloud storage
The file is processed on the server. The source file is deleted after processing,
and the audio expires after one hour. Download it before then.
Up to 5 files. Combined source duration and output duration: up to 60 minutes.
Overlapping files play together. Adjust each recording’s volume to the left of its waveform.
Your mix
00:00Add audio or video
Make the sound yours
Waiting for a videoYour audio track will appear here
Add a video link to get started
Select your clip
Drag the edges on the waveform or move the whole selection. Enter exact times as MM:SS.
What to do with the selection?
Keep a clip or remove a pause from the middle.
Quieter · 0% — original · 100% — louder · 200%
Balanced level
Normalization adjusts the overall loudness.
The sound gradually gets louder.
The sound fades out at the end.
0.5× · slower — 1× — 2× · faster
Natural sound
The output duration updates automatically.
From −12 to +12 semitones. 0 is the original pitch; 12 semitones is one octave.
Enter the known original BPM manually. Tempo = target BPM / original BPM; range: 0.5×–2×. Automatic BPM and key detection is not available yet.
Pitch and tempo can be adjusted independently. These controls preserve pitch when changing tempo. Compare the original and edited audio before downloading.
Clean sound
Compare with the original: strong noise may remain and the tone may change.
Automatic silence removal
A short gap remains between phrases. Preview shows the actual duration.
Your mix
00:00 ·Your original stays unchanged — all edits can be undone.
Up to 10 processed versions per video. Preview saves a version for download.
How to join recordings or overlap audio
Add up to five device files: they upload together, each with its own progress. Audio preparation runs in a queue. Once ready, tracks appear in selection order. You can also add recordings through a supported link or cloud storage.
- 01
Add a file
Upload audio or video from your device. Videos can also be added by link or from cloud storage.
- 02
Adjust the result
Add up to 5 files. Drag tracks in overlap mode or use the arrows to arrange them in sequence. Adjust volume and fades, preview and download your mix.
- 03
Preview and download
Compare with the original and save in your selected format.
How do I join music into one file?
Add two to five recordings and choose Sequential. Each track starts after the previous one; the ↑ ↓ arrows change the order. Use this mode to join songs or parts of a recording without playing them at the same time. Preview the joins before downloading.
Example: put a voice over background music
Add your voice recording and a music file you have permission to use. Choose Overlap. To start both files together, select each track and set Timeline start to 0. To bring the voice in later, set its start to 3 seconds. As a starting point, set the music volume on the left of its track to 20% and the voice to 100%. Preview the mix and adjust the balance until the words are clear. Dragging a track along the timeline also switches to overlap mode automatically.
How do I preview and save the mix?
The Fade in and out checkbox adds two-second fades to the selected track. The play button first prepares the mix on the server, then plays it. After checking the result, choose MP3, WAV, M4A or FLAC and click Mix and download. Both the combined source duration and the mix duration are limited to 60 minutes. Download the result within one hour of preparation.
Which files are supported?
MP3, WAV, M4A, FLAC, OGG, AAC, Opus and videos with audio. Up to 500 MB per file and 60 minutes of audio.
How long is the result available?
Recordings are stored for one hour after processing. Download before expiry. No registration required.
After merging, you can adjust the volume of the finished recording.
Only use content you have the right to process.