AudioBento

Add Audio to Video

Add music, voiceovers, or sound effects to a video clip. Mix with the original sound or replace it, trim the added audio, and preview before exporting an MP4.

Related Audio Tools

Audio tool categories
Audio ConverterConvert audio files and download them together.Convert to MP3Convert audio files to MP3 with a chosen bitrate.Video to MP3Extract an audio track from your video.Convert to WAVConvert audio to WAV for editing and uncompressed playback.Convert to M4AExport audio as M4A with selectable AAC bitrate.Convert to FLACConvert audio to FLAC for lossless file encoding.Convert to OGGConvert audio to OGG Vorbis with quality control.Convert to AACExport AAC audio streams with selectable bitrate.Audio Bitrate ChangerChange MP3 bitrate or convert to M4A and AAC.Stereo to MonoMix stereo channels or keep one side as mono.
Audio TrimmerKeep or remove a section of audio.Audio JoinerJoin audio files in your preferred order.Audio SplitterSplit audio into multiple downloadable clips.Audio Speed ChangerSpeed up or slow down your audio.MP3 Tag EditorEdit MP3 tags, song info, and album art.Add Audio to VideoAdd music or voiceovers to your video.Add Background MusicMix voice and music into one audio file.Silence RemoverRemove pauses or split audio at silence.Ringtone MakerCut songs or recordings into custom ringtones.Reverse AudioTurn your recording into backwards audio.Fade AudioAdd fade in and fade out to audio.Audio LooperRepeat or extend audio with adjustable loops.
Pitch ChangerAdjust pitch and speed with real-time playback.Audio Volume BoosterIncrease the volume of quiet audio.Audio NormalizerAdjust whole-track loudness toward a chosen LUFS.Audio EqualizerShape your sound with five EQ bands and ready-made presets.Bass BoosterMake existing bass frequencies more prominent.Slowed and ReverbMake slowed reverb edits from your songs.8D Audio ConverterAdd a rotating stereo effect to your music.
Voice RecorderRecord your voice and download it in six audio formats.Audio CompressorCompress audio and music files to MP3 in your browser.BPM and Key FinderFind song BPM, musical key, and Camelot code.
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How to Add Audio to Video

  1. 1

    Upload Video and Audio

    Choose a video clip and one music, voiceover, or sound effect file. Both files stay in your browser while you combine video with audio.

  2. 2

    Adjust and Preview

    Trim the added audio with the waveform or Start and End times. Mix audio with video while keeping the original sound, or replace it. Set volumes, looping, and fades, then preview.

  3. 3

    Add Audio and Download

    Click Add Audio to Video to create your MP4. Play the finished video, then download the file to your device.

Bring Your Video and Audio Together

Combine video with audio, balance the original sound, and trim or loop the added track to fit your clip.

01

Add Music to Video Without Losing Original Sound

Add background music to video while keeping dialogue, ambient sound, or other original audio. Switch to Replace Audio in Video when the new track should be the only sound.

  • Keep the video’s original soundtrack
  • Replace the existing soundtrack
  • Preview the video and audio together
02

Set the Balance Between Both Tracks

Control how much of each track you hear. Keep speech clear over quieter music, or bring a new soundtrack forward without changing the video’s picture.

  • Adjust each active track independently
  • Set volumes from 0% to 200%
  • Keep your settings when switching modes
03

Trim and Loop Music to Fit Your Clip

Select the part of your music you want to use. Loop that section to cover the video, or let it end while the picture continues. Fades shape the outer edges of the added soundtrack.

  • Trim added audio with a waveform or times
  • Loop your selection for the full video
  • Fade the added track at its outer edges
04

Add Sound to Video with Your Own Voiceover

Add audio over video for a tutorial, presentation, or personal clip. Your selected recording and video remain on your device throughout the mixing process.

  • Use your own voice recording
  • Replace sound on a silent clip
  • Process files inside your browser

Add Audio to Video FAQ

How do I add audio to a video?
To add audio to a video clip, choose your video and one audio file. Trim the added track with the waveform or Start and End times. Use Keep Audio in Video to retain the original sound, or Replace Audio in Video to swap it. Preview your mix, then export an MP4.
How do I add music to a video?
Choose a music file and select the section you want to use. Select Keep Audio in Video and lower Added Audio Volume until the original speech is clear. Loop Audio repeats the selected section, while fades shape only the added soundtrack.
Can I replace video audio or add sound to a silent video?
Yes. Replace Audio in Video removes the original audio from the output and uses your added track. Videos without an audio track also work. For a silent source, the mode and original-volume controls disappear and the added volume starts at 100%.
What happens when the audio is shorter or longer than the video?
The video determines the output duration. You can trim the added audio with the waveform or Start and End times. A selection longer than the video is cut at the video’s end. A shorter selection repeats when Loop Audio is on. When it is off, the selection ends and the video continues with no added sound.
Do fades repeat each time the audio loops?
No. Fade In and Fade Out apply to the outer edges of the added soundtrack. With looping on, the fades follow the full video duration. With looping off, they follow the portion of added audio used. Original audio is not faded.
Which video and audio formats can I use?
The video must contain an H.264 picture stream that can be copied into MP4. A supported container extension alone does not prove compatibility. Added audio accepts MP3, WAV, M4A, FLAC, OGG, AAC, subject to the processing engine’s available decoders.
What video file will I download?
The result is an MP4 with copied H.264 video and a new AAC audio track. You can select a video up to 2 GB. Exports have a separate memory budget, so a large video may be accepted for preview but too large to export on your device.
Are my video and audio uploaded to a server?
No. File validation, preview, mixing, and video creation run locally in your browser. The processing engine may download when first needed, but your selected media stays on your device. No account or payment is required.

Give Your Video a Soundtrack

Choose a video and an audio track to start your mix.