Fix an MP4 video with no sound
An MP4 that plays without sound usually carries a kind of sound the player does not know, such as Dolby Digital from a TV recording or uncompressed sound from a camera. Convert it here and the sound comes out in the kind every player and editor reads.
- Never uploaded
- No size limit
- No watermark
- Free
Keep this tab open and in front. Browsers slow down background tabs.
Quick answer: To fix an MP4 video with no sound, drop the file into the tool at the top of this page and press "Convert to MP4". iLoveAudioVideo does the work in your browser, so the file is never uploaded. It is free, with no sign-up and no watermark.
Updated
How it works
- Drop your videoThe file is read on your computer, never uploaded.
- ConvertMany videos convert in seconds with no quality loss; the rest are converted at high quality.
- Download the MP4Plays on Windows, Android, iPhone, Mac and every website.
Why an MP4 goes silent
MP4 is only the wrapper. The sound inside is usually in the standard format every device plays, but not always:
- Dolby Digital (AC-3 or E-AC-3), from TV recordings, film downloads and some screen recorders. Windows Media Player, Chrome, many phones and many editors show the picture and play nothing.
- Uncompressed sound from some cameras and screen recorders, which browsers and phones often skip.
- Newer formats used by some apps and downloaders, which older players and editors do not read.
A quick check: if the file has sound in VLC, the sound format is the problem, and converting fixes it.
The fix, in your browser
Drop the MP4 above. The sound is converted to the kind every phone, browser, TV and editor plays, and the picture is copied unchanged when it is already in the most common format, so it looks exactly the same. We tested files with each kind of sound above: all came out with full, normal-volume sound. Nothing is uploaded.
Size limit: files with Dolby Digital sound go through a slower backup path that handles results up to about 1 GB.
No sound in DaVinci Resolve or Premiere
Converting here fixes the files above in most editors. One exception: DaVinci Resolve on Linux cannot read the standard MP4 sound format at all. There, save the sound as a WAV file with the WAV converter (it takes MP4 videos) and put it under the video on the timeline.
If no video has sound
When every video is silent, not just one file, the cause is on the computer: check the volume, the output device and the player's own mute button, and update the sound driver. And if the video was recorded with the microphone off, there is no sound in the file to recover.
Measured, not promised
From our tests on a 2019 Intel MacBook, an Apple M1 and a Windows PC without a graphics card. See all results.
Why your video never leaves your computer
Online video tools upload your file to their servers, process it there, and send it back. That is slow for big videos and costs them money for every minute, so free plans cap your file size or add watermarks, and your video sits on someone else's computer.
Here your own computer does the work, inside this tab. Nothing is uploaded, so there is nothing to cap: no file size limit, no daily limit and no watermark.
Questions
Does the picture lose quality?
Not when it is already in the most common video format: then it is copied unchanged and only the sound is converted. Other videos are converted at high quality.
How do I know if the file has sound at all?
Open it in VLC. If you hear it there, the file is fine and converting it here makes it play elsewhere. If VLC is silent too, the recording has no sound.
Is my file uploaded?
No. The conversion runs inside your browser and the MP4 is saved straight to your computer.
Can I convert several files at once?
Yes. Choose or drop several files together. They are converted one after another with the same settings, and you can download each one or all of them in one ZIP.
Is it really free?
Yes. Your computer does the work, so a video costs us nothing to process. No account, no watermark, no limits.
Is my video uploaded?
No. It is processed inside this browser tab and saved straight back to your computer.
Which browsers work?
Recent Chrome, Edge and Safari on a computer. Chrome and Edge are fastest on most machines. Phones work for short videos.
How long does it take?
In Chrome, a one-minute 1080p video took 13–19 seconds on the laptops we tested and about 40 seconds on a computer without a graphics chip. Safari can be slower.
Can I close the tab while it works?
Keep the tab open and in front until it finishes. Browsers slow down background tabs.