Add Audio to Video
Add music or voice to a video by mixing an audio track with your clip. Local processing keeps files private and outputs a synced export fast.
Why add audio here?
Simple syncing
Combine video and audio into one clean export.
Volume control
Adjust audio level before exporting.
Local privacy
Your media stays on your device while processing.
How adding audio works
- 1
Add a video file.
- 2
Add a music or narration file.
- 3
Set volume and export the new video.
Use cases for Add Audio to Video
This page works best when you already know the workflow problem and need a focused browser tool instead of a generic editor.
Add context with Add Audio to Video
Use Add Audio to Video when the file itself is fine but the final export still needs subtitles, extra audio, text, or image overlays.
Prepare clearer demos and tutorials
These tools are helpful when captions, labels, or supporting assets matter more than changing the underlying media container.
Keep the workflow in one browser tab
This fits quick packaging tasks where you need a final presentable export without moving to a larger timeline-based editor.
Before you start
A quick preflight check usually avoids the most common false starts on browser-based exports.
Start from the original local file
Keep the untouched source nearby before running Add Audio to Video, especially if you plan to compare exports or test multiple settings.
Prepare the main video file input
This tool expects a video file file first, so confirm the browser can access the local source you actually want to process.
Have the secondary audio file ready
Because Add Audio to Video combines more than one asset, line up both files before export so timing and naming stay easy to manage.
Settings guide
These are the controls most likely to change the final result or whether the export fits the target workflow cleanly.
Set volume multiplier on purpose
1.0 keeps the original volume
Output expectations
These notes help you decide whether this page is the right endpoint or just one step before a later conversion.
Expect MP4 output by default
Add Audio to Video exports a MP4 file, so treat this page as a workflow tool first and a format chooser second.
A new export usually means a fresh encode
Most actions here create a new file, so small quality, timing, or size differences are normal even when the visible change feels simple.
Use Video Converter when format is the real question
If the workflow is correct but the destination type is not, move to Video Converter instead of forcing this page to solve a format-choice problem.
Troubleshooting
Most issues come from the source file, the export target, or a mismatch between the workflow problem and the tool you chose.
The browser rejects the file or export feels stuck
Check that the source really matches the expected video file type and try a shorter or smaller sample first to isolate the issue.
The result is larger or softer than expected
That usually means Add Audio to Video solved the workflow problem but still had to re-encode the media, so compare settings before assuming the source was wrong.
This page solves the wrong problem
If the actual blocker is output format compatibility, email size limits, or subtitle handling, move to the dedicated converter, compressor, or subtitle workflow instead.
Related tools
Add Text to Video
Add text overlays for captions, titles, or callouts without complex editors. Process locally for fast exports and private footage handling.
Add Subtitles
Add subtitles by burning in or attaching SRT/VTT tracks to your video. Local processing keeps files private and exports ready to share.
Subtitle Converter
Convert subtitle files between SRT, VTT, and other formats with clean output. Everything runs locally for quick, private conversions.
Extract Subtitles
Extract subtitle tracks from videos and export SRT or VTT files quickly. Local processing keeps media private and outputs ready to edit.
Add Image to Video
Overlay an image or logo on your video to create watermarks or branding. Local processing keeps footage private and exports fast.
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