Concatenate audio
Concatenate audio sequentially or mix it simultaneously in the browser locally, normalize the sample rate, adjust gain and fades, and export WAV.
How to merge audio
Audio files are processed by the local media runtime only in the current browser; they are not uploaded, remote API is not called, and input is not saved.
Add file
Select the audio tracks to concatenate or mix in order, and check the format, duration, and total size limits.
Adjust parameters
Choose concatenation or mixing, set the target sample rate, output gain, and fade-in and fade-out, then start processing.
Preview export
Check the output duration and volume of WAV, then download it after confirming they are correct; canceling or leaving the page releases temporary resources.
Limitations and Notes
- Audio is decoded through the browser’s Web Audio and exported as PCM WAV; whether the input encoding can be decoded depends on the current browser.
- Damaged, oversized, excessively long, or non-allowlisted files will be rejected; remote transcoding will not be attempted.
- The loudness and encoding compatibility of the mixed result require manual listening tests; the page does not guarantee professional mastering.
FAQ
Will the audio be uploaded to a server?
No, decoding, processing, and exporting are all completed locally in the browser.
Why is the first processing operation slower?
The browser must read and decode all audio locally; the larger the files and the greater their number, the more time and memory are required.
Can files be added without limit?
No, the page limits input based on file size, total duration, and memory risks.