Concatenate multiple audio files into one. Supports drag-and-drop reordering, trimming, and crossfade transitions.
Click or drag audio files here
Supports MP3, WAV, OGG, M4A, FLAC
All processing is done locally in your browser. Audio never leaves your device.
Theoretically unlimited, but limited by browser memory. We recommend merging no more than 10 files of medium length (under 5 minutes each). Merging many large files may cause the browser to run out of memory. Process in batches for large projects.
The total length equals the sum of all input files concatenated in order. If you apply trimming to individual files, the trimmed length is used. Crossfade transitions between files add to the total length based on the overlap duration (configurable from 0-5 seconds).
Input: all browser-playable audio formats (MP3, WAV, OGG, AAC, M4A, FLAC, etc.). Output: WAV (lossless, best quality but larger files) or OGG (lossy compression, smaller files). Choose WAV for highest quality, OGG for sharing online.
No quality loss occurs when outputting as WAV (lossless). OGG output involves lossy compression which may slightly reduce quality. The merging process itself simply concatenates PCM data without altering quality.
No. All audio processing is done locally in your browser using the Web Audio API. Audio data never leaves your device. You can safely process sensitive audio content.