How many files can I merge?

There is no hard limit, but browsers start to slow down above ~20 tracks or 500 MB combined. For larger jobs, merge in batches.

Do I need to match sample rates?

No. The merger renders every source into a single OfflineAudioContext so mismatched rates are resampled automatically.

Yes. Each track card has a remove button. You can also drag to reorder at any time before merging.

Merge multiple MP3 and WAV files into one. Drag to reorder and add crossfades between tracks.

Drop MP3 or WAV files here

or click to browse

Your audio never leaves your browser. All merging and encoding happens locally.

Combine multiple audio files into one with optional crossfades.