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Merge Audio Files Online

Join several MP3, WAV, or M4A files into one audio file in order, in your browser. Mixed formats are fine. Nothing uploaded.

Drop files here, paste with Ctrl+V, or

Accepts .mp3, .wav, .m4a, .aac, .flac, .ogg, .opus · Processed on your device, never uploaded

Runs on FFmpeg compiled to WebAssembly (a 31 MB download the first time, then cached). Your file stays in this tab.

About this tool

Combine voice memos, podcast segments, chapters of an audiobook, or samples into a single file. Files are joined in the order you add them, resampled to a common format, and exported as one MP3. Different input formats and bitrates can be mixed freely.

How to use it

  1. Drop your MP3, WAV, M4A or AAC files into the box above, or click to browse. Nothing is uploaded.
  2. Adjust the options if you want; the defaults suit most files.
  3. Click the button and wait a moment.
  4. Download the results individually or all at once as a ZIP.

Questions

How do I control the order?

Files are merged in list order. Add them one at a time in the sequence you want, or remove and re-add to rearrange.

Is there a gap between files?

No gap is added. Trim silence from the ends of each file first if you want them tighter.

Is it free, are files uploaded, which browsers work: the general questions are answered once for the whole site.

Format guides

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MP4 to MP3.mp4 → .mp3WAV to MP3.wav → .mp3M4A to MP3.m4a → .mp3FLAC to MP3.flac → .mp3OGG to MP3.ogg → .mp3MP3 to WAV.mp3 → .wavMP3 to OGG.mp3 → .oggWAV to OGG.wav → .ogg