Audio Joiner
Concatenate two or more audio clips into a single WAV file. Reorderable, browser-side.
Quick answer: Audio Joiner: concatenate two or more audio clips into a single WAV file. Reorderable, browser-side. Runs entirely in your browser, free, no signup.
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Good to know
Joining clips of different origins is trickier than it sounds because they may not share a sample rate or channel count. To produce a seamless, gapless result, this tool resamples everything to a common 44.1 kHz, 16-bit baseline before concatenating — the same standard CD audio uses — so a 48 kHz voice memo and a 22 kHz download stitch together without clicks or pitch jumps.
Output is WAV rather than MP3 for a technical reason: browsers can decode dozens of formats but only encode uncompressed PCM natively. WAV is therefore lossless but large — roughly 10 MB per minute of stereo audio. If you need a compact file to share, run the joined WAV through the audio converter afterward to produce an MP3.
One thing to plan around: clips are butted edge to edge with no crossfade, so any abrupt start or trailing silence in a source file carries straight into the join. Trim your clips cleanly first — the audio cutter is handy for shaving dead air — and reorder them in the list before joining so the sequence is exactly what you want.
Frequently asked questions
- Why is the output WAV instead of MP3?
- Browsers can decode many audio formats but only natively encode WAV. WAV is uncompressed, so the file is bigger; for a smaller MP3, run the joined WAV through our Audio Converter.
- Will the clips be re-encoded?
- Yes — we resample to a common sample rate (44.1 kHz) and bit depth (16-bit PCM) so the join is gapless. Audible quality is preserved; the only loss is from MP3 → WAV → MP3 round-trips, which is minimal.
- Can I add a crossfade between clips?
- Not yet — clips are joined edge-to-edge. For crossfades, use a desktop tool like Audacity or our Audio Cutter to overlap manually.
- Are my files uploaded?
- No — Web Audio decoding and rendering both happen in your browser.
- How long can the output be?
- Limited by your device's memory. A few hours of audio works on most laptops; multi-day recordings won't fit.