Add your tracks, arrange the order, and join them into one file.
Runs locally in your browser
Add two or more tracks to get started.
MP3, WAV, M4A, FLAC, OGG, AIFF, WMA & moreYour audio stays on this device · Up to 128 MB per fileDrag and drop from your device.
Reorder tracks and add a crossfade.
Listen to the result and download.
Open MP3, WAV, M4A, AAC, FLAC, OGG, OPUS, AIFF, WMA, AMR, AC3 and other audio formats supported by the included FFmpeg decoder. You can also extract audio from video files. Support depends on the codec inside the file; damaged or protected files may not open.
Export MP3, WAV, M4A, FLAC, OGG, or M4R ringtones. The converter downloads on first use. Files stay on your device. Refreshing this page clears the current session.
Use arrow keys on the selection handles for precise adjustments. Shift + arrow moves by one second. Press Escape to stop playback.
Complete tool guide
Join two to ten audio files into a single track in the order you choose. Reorder tracks, preview each one, and optionally blend each transition with a crossfade before saving MP3, WAV, M4A, FLAC, or OGG. Mixed sample rates and mono/stereo files are converted automatically so the joins line up.
Your input is processed in the current browser tab and is not sent to the application server.
Choose or drag in the files you want to join. You can add more files later, up to 10 in total.
Put the tracks in order with the up and down buttons, or drag a track to a new position. Remove any you do not need.
Choose a crossfade length if you want the tracks to blend, or leave No crossfade for back-to-back joins.
Pick an output format and select Merge audio, then preview and download the combined file.
The list is joined from top to bottom. Changing the order clears any previous result so you never download an outdated merge.
A crossfade overlaps the end of one track with the start of the next while one fades out and the other fades in. Each crossfade shortens the total length by its duration. It is automatically limited to half the length of a very short track.
Every track is resampled to 44.1 kHz before joining. If any track is stereo, mono tracks are copied to both channels so the output stays balanced.
MP3 and M4A use 192 kbps, OGG uses Vorbis quality 5, FLAC is lossless, and WAV is uncompressed 16-bit PCM. The result is named merged-audio with the matching extension.
Start with: intro.mp3 (0:15), interview.wav (8:00), outro.mp3 (0:20)
merged-audio.mp3 · 8:33.00The tracks total 8:35. Two 1-second crossfades overlap the joins, removing 2 seconds.
Start with: song-a.flac (3:00, 48 kHz stereo) and song-b.mp3 (4:00, 44.1 kHz stereo)
merged-audio.flac · 7:00.00 · 44.1 kHz stereoWithout a crossfade the lengths simply add up. The 48 kHz track is resampled to 44.1 kHz so both parts play at the correct speed and pitch.
Tracks are joined at their original levels. If one file is much quieter, adjust it in another editor first, or check the levels with the Audio Inspector before merging.
All tracks together must fit within 256 MB of decoded audio and 30 minutes. At 44.1 kHz stereo that is about 12 minutes in total, so merge long material in smaller batches.
Without a crossfade, the last sample of one track is followed directly by the first sample of the next. Silence that is already inside a file, such as encoder padding at the end of an MP3, is kept.
Up to 10 files per merge, as long as their decoded audio fits the 256 MB memory budget. You can merge the result with more files in a second pass.
Yes. Every file is decoded to raw samples first, so you can combine MP3, WAV, M4A, FLAC, OGG, and other supported formats and choose any output format.
Each crossfade overlaps two tracks. Three tracks with a 1-second crossfade have two overlaps, so the result is 2 seconds shorter than the sum of the tracks.
No. Decoding, joining, and encoding all happen in this browser tab. Only the converter code downloads the first time a format needs it.
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