Audio Merge - Join Multiple Audio Files into a Single Track Online — Combine several audio clips (MP3, WAV, FLAC, OGG, M4A, AAC and more) into one continuous audio file. Select your files, drag them into the right order with the arrow buttons, pick an output format, and download the merged result. Everything is processed locally in your browser, with files never uploaded to a server.
Supported input: MP3, WAV, FLAC, OGG, Opus, M4A, AAC, WMA, AIFF and other common audio formats. Mixed formats in one merge are fine - each track is resampled to a common sample rate and channel layout automatically. Files are never uploaded to a server.
First use loads an ~30MB audio processing engine into the current browser. It is cached and reused afterwards, so please be patient.
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Click to select or drag and drop audio files (select multiple)
Any common audio format; 2 or more files recommended
Default settings: MP3 192 kbps, OGG quality 5, WAV/AIFF 16-bit PCM, FLAC level 5, WavPack level 3. Merged tracks are normalized to 44100 Hz stereo for a clean result.
How merging works: every track is first aligned to one common format (44.1 kHz, stereo) and then concatenated, so mixed inputs — an MP3 plus a WAV, say — join without glitches. Raw concatenation requires all tracks to share the same sample rate and channel count; resampling is what makes mismatched files compatible. The output is then re-encoded once in the format you choose: a lossless output (WAV, FLAC, AIFF, ALAC, WavPack) keeps the decoded audio intact, while MP3 or OGG output adds one lossy generation.
