VideoToolkit • 100% on-device
Replace Video Audio
Replace the existing soundtrack using your own audio file.
Maximum combined input size: 64 MB desktop / 24 MB mobile; each clip up to 90 seconds.
Select your local media to begin.
Results
How to use it
Choose your local file, adjust the available controls, and select Process in browser. Keep the tab open while the engine works. Preview and download the result only after successful processing. If a codec is not supported, try a short MP4/H.264 clip first.
Why output varies
Container format and actual video/audio codecs are different. A supported filename is not a promise that every encoded track can be decoded. Processing can be memory intensive on phones and older laptops, even under the published size limits.