What does Audio Merger do?
Combine multiple audio files into one ordered result. Drag tracks into sequence, preview each source, remove or duplicate items, and choose a direct join or short crossfade. FFmpeg.wasm normalizes differing sample rates and channel layouts before exporting one local audio file.
How to use Audio Merger
- 1Add at least two audio files.
- 2Drag tracks into output order and preview each source.
- 3Choose direct sequence or a short crossfade plus output settings.
- 4Merge locally, preview the combined result, and download.
Supported inputs and outputs
Inputs
MP3, WAV, M4A/AAC, WebM/Opus
Outputs
MP3, WAV, M4A/AAC, WebM/Opus
Practical uses
- Joining podcast sections
- Combining voice notes
- Sequencing music drafts
- Creating one review file
Browser and media limitations
- Every input must contain decodable audio.
- Crossfades shorten the total duration.
- All tracks are re-encoded into a common output.
- Large collections can exceed browser memory.
How local processing works
Processing uses FFmpeg.wasm locally in this browser. The media engine downloads on first use, but the selected media and result are not uploaded to Tubelexity or a processing server.
Frequently asked questions
Can I merge audio files with different formats?
Yes, when FFmpeg can decode them. They are normalized before joining.
Can I change the track order?
Yes. Drag the ordered list before merging.
Does the merger support crossfades?
Yes. Choose a half-second or one-second crossfade.
Why is audio re-encoded?
Differing codecs, sample rates, and channel layouts must be normalized for a reliable combined file.
Are tracks uploaded?
No. All inputs stay local.