What is Audio Crossfade?

Blends the end of one audio track into the start of the next for smooth transitions. Set the crossfade duration and curve type (linear, exponential, equal power) until it sounds right. Works great for DJ sets, podcast editing, and mixtapes.

Crossfades are computed sample-accurately right on your device, so a 6-second fade between two 44.1 kHz tracks lines up to within a single sample. You can drop in MP3, WAV, OGG, FLAC, AAC, or WebM files; the merged output is exported as a single audio file you can preview before saving. Trim each track to cut intros or outros first, then pick a curve: equal-power keeps the perceived loudness flat at the midpoint, which is why it's the default for DJ-style transitions.

How to use

1. Upload two audio files — Track A and Track B. The tool shows their waveforms side by side with the overlap zone highlighted.
2. Set the crossfade duration (1-30 seconds) and choose a fade curve: linear for steady blending, exponential for dramatic transitions, or equal power for constant perceived volume.
3. Preview the crossfade in real-time, adjust timing if needed, then download the merged audio as a single file.

When to use

• Joining two songs in a DJ mix or a workout playlist without an audible gap.
• Stitching together podcast segments recorded in separate takes so the cut isn't obvious.
• Looping ambient or background tracks for video so the seam is undetectable.

Result

A wedding DJ uploads a slow dance track and an upbeat song, sets a 6-second equal-power crossfade, previews the transition to confirm the energy shift feels natural, then downloads the merged file.

FAQ

What's the difference between linear, exponential, and equal-power curves?

Linear fades each track at a steady rate, which causes a 3 dB volume dip at the midpoint. Exponential starts slow and accelerates, good for dramatic builds. Equal-power keeps the combined loudness constant, so DJs reach for it on music.

How long should my crossfade be?

For dance music with a steady beat, 4 to 8 seconds usually feels natural. Spoken word or podcast cuts work better at 0.5 to 2 seconds. Ambient pads can stretch to 15 or 20 seconds without sounding awkward.

Does the tool re-encode my audio or change its quality?

The crossfade math runs at the source sample rate. Output is encoded once at 44.1 kHz to a single file, so you avoid the generation loss of running both tracks through separate effects passes.

Can I crossfade tracks that have different bitrates or sample rates?

Yes. The tool decodes both files first and resamples them to a common rate before the fade, so a 320 kbps MP3 and a 16-bit WAV mix together cleanly. The output sample rate matches the higher of the two inputs.

Why does the merged file have a longer duration than the sum of the originals?

The output length is trackA + trackB minus the crossfade duration, since the two tracks overlap during the fade. A 60-second song crossfaded 6 seconds into a 50-second song gives a 104-second file.

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