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Audio Joiner

Combine recordings into one audio file in the order you choose. Mix supported input formats and select a common output format, sample rate and channel count.

Audio and transcripts stay on your device. Processing runs in your browser.
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Choose audio files

MP3, WAV, M4A, OGG, FLAC. Up to 100 MiB per file (50 MiB on touch devices), 1800 seconds. Decoded audio memory limits also apply.

    Settings

    Bitrate applies to MP3 and AAC. WAV uses 16-bit PCM; FLAC is lossless. OGG uses quality-based encoding.

    Result

    Your result will appear here

    Add files, pick your settings, then select Join audio.

    No account or daily usage quota. File and device limits protect your browser from running out of memory.

    Processing audio

    Checking your settings…

    How to use Audio Joiner

    1. Select the audio files you want to combine, or drop them into the input area.
    2. Use Move up and Move down to set the playback order.
    3. Choose the output format, sample rate and channels for the combined recording.
    4. Press Join audio. Preview the combined file and download it.

    Different inputs need a common audio format

    Recordings can use different codecs, sample rates and channel counts. The joiner first converts them to a common PCM format at the selected rate and channel count, then concatenates them and encodes the output.

    This makes the order predictable when, for example, you combine a mono voice note with a stereo music recording. Resampling and downmixing may change the source signal. The combined duration and temporary PCM data also need to fit the displayed processing limits.

    Assemble a recording from separate takes

    Add the introduction, main recording and closing clip. Reorder them before running the joiner, then listen across each boundary. The files play end to end; silence already in a source remains in the result.

    Trim an MP3 source with MP3 Cutter if it has an unwanted pause. Use Audio Fade In/Out for a gradual start or finish on the final recording.

    Before you download

    • Joining does not add a crossfade, remove silence or normalize loudness.
    • Combined duration and decoded audio size must fit browser memory limits.
    • The output is re-encoded. Input metadata and artwork are not merged into a new album record.

    Frequently asked questions

    Can I mix MP3 and WAV files?

    Yes, when both can be decoded in your browser. Each input is normalized to a common sample rate and channel count before joining.

    Can I change the order?

    Yes. Use the Move up and Move down buttons before joining. The displayed list is the output playback order.

    Will there be silence between recordings?

    The joiner does not intentionally add a pause. Silence already present at the end or beginning of an input remains.

    Does the joiner match the volume of all files?

    No. It matches format, sample rate and channels. Recordings with different loudness can still sound uneven.

    Often used together with Audio Joiner.

    • MP3 Cutter

      Trim MP3 audio with waveform positioning and exact time fields.

    • Audio Fade In/Out

      Add independently timed fades to the start and end of an audio file.

    • Audio Converter

      Convert between common audio formats with bitrate and channel controls.