Do you have a MP4 video or movie file that will not open correctly? If so, our free-to-use MP4 video repair tool may be able to help. Our tool analyses the content of your MP4 file and is able to determine if the file content is valid. Our tool will let you know what is wrong with your MP4 file and attempt to fix it.
Or drag and drop your files here to upload.
A maximum of 20 files can be uploaded at once.
Here are 3 simple steps to repair your MP4 using our fast and free repair tool.
No. Our MP4 repair tool will not adjust the resolution or quality of the repaired file.
Yes! Our MP4 repair tool is 100% free to use.
No, you can repair as many files as you wish. We do not have any limits when using our MP4 repair tool.
We aim to process MP4 repairs as quickly as possible; this usually takes around 5 seconds; however, this may be longer depending on the file size and data needed to be repaired.
Once your MP4 has been selected, it will undergo some initial checks to verify that the file has some basic information. If the initial checks pass, we then upload the file to our servers for more detailed analysis.
Yes, of course it is! Your MP4, once repaired, is deleted 15 minutes after upload, and any download link will expire after this time.
Yes! Our MP4 repair tool will run on any system with a modern web browser.
| Extension | MP4 |
| Full Name | MPEG-4 |
| Type | Video |
| Mime Type | video/mp4 |
| Format | Binary |
An MP4 file is a modern standard format for storing high-quality motion video in a highly compact and efficient file size. The specific compression algorithm used within an MP4 file can vary from file to file; however, they all enable what would otherwise be a large amount of uncompressed data to be reduced to a fraction of the original size with little or no noticeable difference in playback quality.
Due to their widespread support, MP4 files can be loaded into most video editing applications and played with most video playback software with no additional drivers. Most video sharing sites, such as YouTube, support MP4 as a format when uploading, and most tablets and smart phones can record in the MP4 format.
Audio stored within an MP4 file is usually stored in the MP3 format, taking advantage of that format's high quality and compression capabilities.
MP4 files are all binary format in nature, storing video frames in a compressed format dictated by a bit-rate setting. This bit-rate setting is often located within the file header bytes, a sequence of bytes unique to a particular file format. The header bytes not only identify the type of video file to be played but also compression and codec settings.
By analysing the MP4 file header bytes, our tool is able to calculate the expected length of the video file and also perform other integrity checks to ensure the video file is what the header bytes claim it to be. Our MP4 repair tool can check the header byte sequence relatively quickly and report any immediate issues right away.
As mentioned above, within the MP4 file data are values that determine how aggressive the compression algorithm is when it comes to balancing file size with playback quality. Our tool will not alter any bit rate or other quality settings; these will be preserved during any repair performed on the uploaded file.
Our tools support most common codecs, allowing our tool to parse the MP4 file content when looking for issues with the playback of the file.
