Trim & Split Video Audio
Cut away unwanted beginnings or endings, split clips at the playhead and isolate the exact section you want to edit. Adjust one moment without rebuilding the entire soundtrack.
Free Online Video Audio Editor
Edit audio in your videos with a free online multitrack editor. Trim and adjust original sound, add music and voiceovers, mix separate audio tracks, and export your finished MP4 without a watermark.
100% Free · No Watermark · No Sign-up · Private Browser Editing
Complete Video & Audio Editing
Edit Video Audio on a Multitrack Timeline
Your video has more than one sound to manage. Keep dialogue, background music, voiceovers and sound effects on separate tracks while editing the picture in the same timeline. Make precise changes, preview everything together and export one finished video.
Inside the video audio editor
Edit Video and Original Audio Together
See your video and its soundtrack in one workspace. Trim or split video clips, adjust the original audio and preview every change against the picture without switching between separate editors.
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Camera audio
Camera audio
Original sound
Original sound
SplitFadeVolume 100%Stereo mix
Inside the video audio editor
Mix Multiple Audio Tracks Without Losing Control
Keep original sound, background music, voiceover and effects on independent tracks. Move and overlap audio clips, lower music beneath speech or bring a sound effect in at the exact moment it belongs.
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Video
Video
Voiceover
Voiceover
Background music
Background music
SplitFadeVolume 100%Stereo mix
Inside the video audio editor
Fine-Tune Each Audio Clip Independently
A loud intro doesn't mean the whole video needs to be quieter. Select individual clips to adjust volume, fades, speed or pitch while leaving the rest of your soundtrack unchanged.
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Video
Video
Selected dialogue
Selected dialogue
Music
Music
SplitFadeVolume 82%Stereo mix
Inside the video audio editor
Preview, Mix and Export Video with Audio
Play back the complete edit with picture and sound synchronized. Check the balance of every track, then export your video as an MP4 with a stereo soundtrack—free and without a watermark.
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Final video
Final video
Mixed soundtrack
Mixed soundtrack
SplitFadeVolume 100%MP4 ready
Multitrack Audio Editing Tools
Trim, Mix and Adjust Every Audio Track in Your Video
From removing a few seconds of unwanted sound to balancing a complete music-and-voiceover mix, AudioMuse gives you clip-level audio controls inside an easy-to-use online video editor.
Dialogue82%Music38%Effects64%
Layer & Arrange Audio Tracks
Add music, voice recordings and sound effects to separate tracks. Drag clips into position, overlap sounds and control when each element enters or leaves the mix.
Adjust Audio Volume
Make speech easier to hear, turn down loud music or adjust a quiet recording. Change the volume of selected audio clips instead of raising or lowering the entire video.
Add Audio Fade-In & Fade-Out
Fade background music in smoothly, soften a sudden audio cut or finish your video without an abrupt ending. Apply fades only where they're needed.
Change Audio Speed & Pitch
Speed up, slow down or change the pitch of individual audio clips for timing or creative effects. Keep the other tracks at their original settings.
Reverse & Normalize Audio
Reverse a selected sound for a creative transition or normalize a quiet recording before mixing it with other tracks. Keep adjustments focused on the clip you select.
Popular Video Audio Editing Workflows
Make Your Videos Sound as Good as They Look
Different videos need different soundtracks. Whether you're editing dialogue, adding background music or recording narration, AudioMuse helps you shape the audio around the story you're telling.
A practical workflow
Make speech lead the mix
When music covers your voice or the opening feels abrupt, keep the camera audio as the anchor and shape everything around it.
- 1Clean the opening
Trim setup noise or split out a mistake.
- 2Add supporting music
Place music below the voice and lower its level.
- 3Finish smoothly
Fade the ending and preview picture with sound.
00:12
Dialogue
Music bed
Outro
A practical workflow
Guide viewers without losing the screen action
Add a clear explanation after recording, then move each voiceover clip until it matches the step shown on screen.
- 1Keep useful system sound
Mute only the parts that distract.
- 2Record the explanation
Add voiceover in short, movable takes.
- 3Match each step
Align clips to the screen action and balance levels.
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Screen video
Voiceover 01
Voiceover 02
A practical workflow
Turn a recording and image into a shareable video
For songs, podcast previews or spoken messages, use one image as the visual and let the audio carry the result.
- 1Choose a photo
Start with JPG or PNG rather than a video.
- 2Add the recording
Place music or speech on the audio timeline.
- 3Export as video
Create an MP4 that is ready to upload and share.
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Cover image
Main audio
End fade
Explore More Video Audio Editing Features
Everything You Need to Edit Audio in a Video
From adding background music to replacing a soundtrack or adjusting video volume, AudioMuse brings essential video audio editing features into one free online editor. Explore what you can do with your video and its sound.
Add Audio to Video
Add music, voiceovers or sound effects to your video while keeping the original audio. Arrange and balance multiple soundtracks on the timeline.
Replace Audio in Video
Replace your video's original soundtrack with new music, narration or other audio. Adjust the timing and volume to match your footage.
Remove Audio from Video
Remove unwanted audio or mute your video completely. Keep the visuals while controlling which sounds remain in the final edit.
Boost Video Volume
Increase quiet video audio or lower sounds that are too loud. Adjust volume levels to make dialogue, music and other audio easier to hear.
Extract Audio from Video
Extract the soundtrack from your video and save it as a separate audio file. Keep dialogue, music or other recordings for listening or further editing.
Add Music to Photo
Combine a photo with music, narration or another audio recording. Turn a still image into a shareable MP4 video using the same editor.
From upload to finished video
Edit video audio online in three clear steps
No complicated setup or editing software required. Upload your video, make changes on the multitrack timeline and download the finished MP4—all in your browser.
- 1
Upload a video
Choose MP4, MOV, M4V, WebM or MKV. The browser prepares the picture and original sound for the timeline.
- 2
Edit and layer the sound
Trim or mute the original audio, import music, record voiceover and adjust each clip while watching the video preview.
- 3
Preview and export MP4
Watch the complete mix for timing and balance, then download one video with its finished stereo soundtrack.
Supported Formats & Project Limits: Import MP4, MOV, M4V, WebM or MKV (up to 100 MB / 10 min each). Supports 48 video clips, 7 audio tracks and 48 audio clips. Export MP4 with stereo AAC audio. Actual limits depend on your device's performance.
Designed for browser editing
A Free Online Video Editor Without the Usual Limitations
You shouldn't need to install a large application or pay just to edit the sound in your video. AudioMuse brings multitrack audio editing, precise clip controls and MP4 export into your browser—with no account or watermark required.
100% Free Video Audio Editing
Edit video and audio, arrange multiple tracks and export your finished video for free. No subscription or paid export is required.
Online Editor, No Download
Open the video audio editor in your browser and start working. No desktop software or complicated installation process.
Private Browser-Based Processing
Your source video and added audio are processed locally on your device rather than uploaded to an AudioMuse processing server.
No Sign-up Required
Upload your video, edit its audio and download the finished result without creating an account or connecting your media to a profile.
Export Videos Without a Watermark
Download your finished MP4 without an AudioMuse watermark, even when using the editor for free.
Multitrack Editing Made Simple
Keep video, original sound, background music and voiceovers visible on one timeline. Make precise changes without learning a complex professional editing suite.
Video audio editor FAQs
Everything you need to know about editing video sound online, mixing multiple audio tracks, adding music or voiceovers, and exporting MP4 videos for free.
How can I edit audio in a video online for free?
Upload your video to AudioMuse's free online video audio editor. Use the timeline to trim or split clips, adjust the original sound, add music or voiceovers, and fine-tune individual audio tracks. Preview your changes with the video, then export the finished MP4 without a watermark or sign-up.
Is AudioMuse Video Audio Editor completely free?
Yes. AudioMuse Video Audio Editor is free to use, including multitrack editing and MP4 export. You don't need a subscription, credit card or account, and your exported video won't have an AudioMuse watermark.
Can I edit the audio in an MP4 video without extracting it?
Yes. AudioMuse lets you edit MP4 audio directly alongside the video on a multitrack timeline. You can adjust volume, split audio clips, add music or record voiceovers while keeping the video visible. If you only need the audio as a separate file, use our Extract Audio from Video tool.
Can I edit video and audio together on the same timeline?
Yes. AudioMuse is a video and audio editor that displays video clips and separate audio tracks in one workspace. You can trim or split video clips, move audio, arrange music and narration, and preview how the soundtrack matches the picture.
Does the video audio editor support multiple audio tracks?
Yes. You can work with up to 7 audio tracks and 48 audio clips in a project. Keep original video sound, background music, voiceovers and effects separate so you can move, trim and adjust each clip independently.
Can I add background music without removing the original sound?
Yes. You can keep your video's original audio and add background music on a separate track. Lower the music volume beneath speech, adjust its timing and apply fades without changing the original soundtrack. For a simpler workflow, try Add Audio to Video.
Can I record and edit a voiceover for my video?
Yes. Record a voiceover directly in the editor or import an existing audio recording. Place each take on the timeline, split or trim unwanted sections, and adjust the volume to match the original video sound.
Can I mute, remove or replace audio in a video?
Yes. Mute the original audio, lower its volume or replace it with new music or narration. You can make these changes inside the full editor, or use Remove Audio from Video and Replace Audio in Video for focused edits.
Can I adjust the volume, speed or pitch of individual audio clips?
Yes. Each audio clip can have its own volume, fades, speed and pitch settings. You can also reverse or normalize selected audio clips without applying the same settings to every track. If you only need to make video sound louder, try Video Volume Booster.
What video formats can I import and export?
AudioMuse supports MP4, MOV, M4V, WebM and MKV video imports. The editor exports finished projects as MP4 videos with stereo AAC audio. Each imported video can be up to 100 MB and 10 minutes long, subject to available browser memory.
Does AudioMuse upload my video or audio files to a server?
No. Video and audio editing are processed locally in your browser. Your source media is not uploaded to an AudioMuse processing server, so you can work on your soundtrack without sending the original files to the cloud.
Is AudioMuse a good alternative to desktop video editing software?
If your main goal is to edit video audio online, AudioMuse offers a simpler, free alternative to installing a full video editing application. It supports multitrack audio editing, music, voiceovers, clip-level controls and MP4 export. It doesn't replace advanced video editors for tasks such as professional color grading, complex visual effects or automatic subtitling.
Can I remove background noise or automatically add subtitles?
Not in this video audio editor. Its focus is editing, arranging and mixing the soundtrack of an existing video. For noise cleanup, try AudioMuse's AI Noise Reduction tool. Automatic subtitle generation is not included in this editor.
Make every layer of the soundtrack work together
Upload a video, keep the useful original sound and build the rest of the mix around it.
Upload a video