Can this fix an MP4 that has audio but no video?

It can often recover playback when the issue is container metadata corruption. If video frame data itself is physically missing, repair may be partial.

Do I need a reference file for MP4 repair?

Not always. Most files can be repaired directly. A reference file helps when the damaged file has lost critical codec metadata.

Does MP4 repair require uploading my file?

No. Processing stays local in your browser. Files are not uploaded to a repair server.

Can a 0-byte MP4 be repaired?

No. A 0-byte file contains no media data to recover. Non-zero files have a much better chance of repair.

Built for users searching for immediate MP4 recovery without installing desktop software.

Repair Corrupted MP4 Files Online

Fix MP4 files that will not play after interrupted recording, transfer errors, or storage damage. VideoRepair rebuilds missing metadata directly in your browser.

MP4 video shows black screen but file size is normal

Player says file is unsupported or cannot seek

Recording stopped unexpectedly and playback fails

Live workspaceLocal processing

Drop in. Repair out.

Upload, repair, preview, and export without leaving the homepage.

Pick

Damaged clip

Fix

Live repair

Save

Preview + export

Formats

MP4, MOV, AVI+

Privacy

No upload

Reference

Optional

Drag video here, or click to select file

Supports .mp4, .mov, .m4v, .m4a, .3gp, .avi formats. Max 4GB

Repair Engine Loading

Uploader unlocks as soon as the engine is ready.

Why This Repair Page Works

Metadata Rebuild

Repairs broken playback indexes and reconstructs missing moov data needed for seeking and timeline recovery.

Reference File Assist

Uses a healthy file from the same device to recover codec and timing details when metadata is heavily damaged.

Local Privacy

All repair steps run inside your browser with WebAssembly. Your MP4 files stay on your device.

Repair in 3 Steps

Select your MP4 file

Choose the corrupted MP4 file you want to repair. Add an optional reference clip from the same device and settings for severe corruption cases.

Start repair in your browser

Run the browser repair engine so it can inspect the container, rebuild missing metadata, and reconstruct a playable file structure.

Preview and download

Preview the recovered output in your browser, then download the repaired file once playback and timeline look correct.

Frequently Asked Questions

Quick answers for this repair scenario so you can decide fast and start recovery.

Can this fix an MP4 that has audio but no video?: It can often recover playback when the issue is container metadata corruption. If video frame data itself is physically missing, repair may be partial.
Do I need a reference file for MP4 repair?: Not always. Most files can be repaired directly. A reference file helps when the damaged file has lost critical codec metadata.
Does MP4 repair require uploading my file?: No. Processing stays local in your browser. Files are not uploaded to a repair server.
Can a 0-byte MP4 be repaired?: No. A 0-byte file contains no media data to recover. Non-zero files have a much better chance of repair.