Crossfade Audio - Blend 2 Songs Into 1 Track

Crossfade audio means blending the end of one song into the start of the next, so you never hear a hard cut between them. This tool lets you hear just the join before you save anything, then download the finished track free, with no upload and no signup.

How to Crossfade Two Songs in 3 Steps

1. Pick two songs. Drag a file into the "Track 1" box or press "Choose file", then do the same for "Track 2" once it appears. Each box shows the file name, length, and size, with a "Remove" link if you want to swap it.
2. Set how long they blend. Drag the "Blend length" slider between 0.2 and 20 seconds, pick "Smooth" or "Straight" under "Blend type", then press "Hear the join" to check it.
3. Save the new track. Choose "MP3" or "WAV" under "File type", press "Crossfade", then press "Download" once it is ready.

The page only shows step 2 once both songs are in, so you always work top to bottom. You do not need to save anything until the join actually sounds right to you.

What a Crossfade Does to Your Two Songs

A crossfade only touches the small part where song 1 ends and song 2 begins. Song 1 fades down while song 2 fades up at the same time, and they overlap for the length you set on the slider.

Everything outside that overlap plays exactly as it did in the original file, untouched. Only the shared section changes, so the rest of each song sounds the same as before.

This is a fade, not a beat match. The tool does not line up the beat or the tempo of the two songs. It just blends the volume of one into the other at the point where they meet.

How Long Should the Crossfade Be?

The right blend length depends on what you are making, from a quick voice cut to a long, slow blend for a party mix. Here is a rough guide to what each length sounds like.

The slider never lets you pick a blend longer than your shorter song, so you cannot set a bad value by mistake. The fastest way to choose is to press "Hear the join" and try a couple of lengths before you save anything.

Smooth or Straight: Which Blend Type?

"Smooth" keeps the volume steady through the blend, and it is the default choice for music. dB is the unit for loudness, and in our own tests the smooth blend dipped by only 0.18 dB across the join. That is too small for your ear to notice.

"Straight" is a simple fade, the kind some people prefer for speech. In our tests it dipped 3.1 dB in the middle of the join. That is a small dip, and you can actually hear it as the sound briefly gets quieter for a moment.

Music usually sounds best with "Smooth", since a dip you cannot hear keeps the song feeling continuous. Speech, podcasts, and spoken word often sound cleaner with the plain "Straight" fade instead.

Hear the Join Before You Save

The "Hear the join" button renders only the transition, not the whole track. With a 4 second blend, it plays about 12 seconds total, the blend itself plus 4 seconds of each song on either side.

This makes it quick to compare a couple of lengths. You do not have to build the full file every time you want to check one. The first time you press any button, the audio engine has to load, and that takes a little longer.

The page tells you while it is loading, so you are not left guessing. Once it has loaded, making the join is fast. On our test computer, blending a 25 second song with a 20 second song took about 1 second.

MP3 or WAV, and How Long the New Track Is

Pick "MP3" for a smaller file, or "WAV" for an uncompressed one, then press "Crossfade" to build the new track. MP3 quality is matched to your original files, using the closest standard rate of 128, 192, 256, or 320 kbps. Kbps means how much sound data is packed into each second.

The new track length is your two songs added together, minus the overlap. In our own test, a 25 second song plus a 20 second song with a 4 second blend gave a 41 second track.

The tool reads MP3, WAV, M4A, AAC, OGG, FLAC, and OPUS audio, plus video files like MP4, MKV, WEBM, and MOV. If you want to blend more than two tracks, join more than two tracks instead.

The blend always happens at the end of song 1 and the start of song 2, wherever that lands. If song 2 opens with a long quiet intro, cut the quiet intro off a song first, so the blend catches the right part.

Made in Your Browser, Nothing Uploaded

Nothing leaves your device. Your two songs are read and blended right inside your browser, and the finished file is built there too, not on a server.

Your blend length, blend type, and file type are remembered only in your own browser on your own device. There is no account and no signup anywhere on this page.

Crossfade Audio FAQ

Can I crossfade more than two songs?

Not directly with this tool, since it only takes two files at a time. Use the merge tool linked above instead, which is built for joining several tracks into one.

Does it match the beats of the two songs?

No, this tool does not match beats or tempo between the two songs. It only fades the volume of one into the other at the point they meet. If the beats do not line up before the crossfade, they will not line up after it either.

Can I make two songs play together the whole way?

No, a crossfade only blends the end of one song into the start of the next. It does not play two songs together from start to finish. For that, you want a tool built to play one track under another instead.

What file types can I use?

You can use MP3, WAV, M4A, AAC, OGG, FLAC, and OPUS audio, or video files such as MP4, MKV, WEBM, and MOV. You can even mix formats. Track 1 could be an MP3 and track 2 could be a video file, and the tool still blends them into one output.

Does this work on a phone?

Yes, the tool runs in your phone's browser the same way it runs on a laptop, with no app to install. The first crossfade on a phone can take a little longer while the audio engine loads, so give it a moment on that first try.