Audio Joiner

Turn separate clips into one recording. Put them in order, trim the unwanted parts and choose how each clip flows into the next.

No uploadsTrims & crossfadesWAV & MP3 downloads

1. Add your audio clips

Drop 2–10 clips here. Up to 20 MiB per file, 50 MiB total and 5 minutes of decoded audio in total. Mono and stereo are supported; playable input formats depend on your browser.

Choose at least two clips to begin.

2. Choose the transitions

Between clipsSilence / crossfade (seconds)Output channelsFade in (seconds)Fade out (seconds)Normalize the joined audioOutput formatDownload filename

Crossfade overlaps clips and shortens the result; silence makes it longer. Crossfade is limited to half the shortest trimmed clip. Peak protection reduces volume when needed. Normalization adjusts the whole recording, not each clip separately.

3. Check the sequence & join

Add at least two clips to see the output plan.

Using Audio Joiner

Combine short audio recordings into one sequence with local trimming and transitions.

Choose 2–10 mono or stereo audio files. Each file may be up to 20 MiB; total source size is 50 MiB and decoded duration is limited to five minutes.
Set clip order with drag or Earlier/Later buttons and enter trim start/end seconds. Choose direct joins, silence or crossfade, and optional whole-recording fades and normalization.
Create the audio, listen to the joined preview and download WAV or MP3. The optional timing report describes clip positions and overlaps.

Example

Two clips trimmed to 4 seconds each with a 0.5-second crossfade.
Output duration is 7.5 seconds: clip 2 starts at 3.5 seconds. A 0.5-second silence instead gives 8.5 seconds.

Questions & answers

Which audio formats can I open?

The tool uses your browser audio decoder. WAV and MP3 are common choices; AAC, M4A, Ogg, FLAC and WebM support varies by browser and codec. If decoding fails, convert the file to WAV or MP3 first.

Does joining preserve the original MP3 bytes?

No. Audio is decoded, trimmed and re-encoded. WAV exports 16-bit PCM; MP3 uses 192 kbps and adds lossy compression. Tags and cover art are not copied.

Why is the duration different after crossfade?

Crossfade overlaps adjacent clips and subtracts its duration at each join. Silence adds duration. MP3 may have a little encoder padding, so a player can report a slightly longer duration than the PCM timeline.

Can I combine mono and stereo clips?

Yes. Automatic output uses stereo if any clip is stereo. Mono clips are duplicated into both channels for stereo output; mono output averages the left and right channels.

What does normalization do?

It adjusts the whole joined signal toward a 0.95 peak, with a maximum fourfold boost. It does not equalize the loudness of individual clips. Peak protection attenuates signals that would otherwise clip.

Are my recordings uploaded?

No. Decoding, joining and encoding run locally. The tool does not record from the microphone or save your audio between sessions.