About the Media Info Viewer
Sometimes you need to know exactly what is inside a video or audio file before you edit, upload or convert it. Drop a file here and this viewer reads it and lists its container format (such as MP4, WebM or MKV), the video and audio codecs, the duration, the resolution with a friendly name like 1080p, the aspect ratio, the file size and the overall bitrate, plus whether it has video and audio tracks at all. This helps when a website asks for a specific format, when a file will not play in a certain program or when you want to estimate how much a conversion will shrink the file. The file is read on your device only and nothing is uploaded.
Updated October 2026
How to use the Media Info Viewer
- 1Drop a video or audio file, or press Select a file.
- 2Wait a moment while the file is read.
- 3Read the container, codecs, duration and size.
- 4Check the resolution, aspect ratio and bitrate.
- 5Press Copy details to paste them into a message or ticket.
Reading the numbers
The container tells you the file type and which players can open it. The codec tells you how the picture or sound was compressed, and that is what decides whether an old device can play it. The resolution and bitrate together tell you about quality: a 1080p video at 2 Mbit/s will look much worse than one at 8 Mbit/s.
If you want a smaller file, the bitrate is the number to watch. Halving the bitrate roughly halves the file size, and for most screens a lower bitrate looks fine at 720p.
Some files report their length slightly differently from the playing time shown by a player, especially after editing or when the file was recorded live. Variable bitrate files also have a changing rate, so the average shown here hides the quiet and busy parts. When a file will not open, the codec line is the first thing to look at, because a missing decoder is the usual reason.
Typical values
- Phone video: 1080p, H.264 or HEVC, 8 to 20 Mbit/s.
- Web video: 720p or 1080p, H.264, 2 to 6 Mbit/s.
- Music MP3: 128 to 320 kbit/s.
- Podcast: 64 to 128 kbit/s.
- CD-quality WAV: 1,411 kbit/s.
- 4K video: 15 to 50 Mbit/s.
Related tools
To shrink a video use the Video Compressor, and to change its format use the Video Converter. Cut a clip with Trim Video, pull out the sound with Extract Audio from Video and estimate a result size with the Video File Size Calculator. Check the settings before you convert to avoid losing quality.
Features
- Container format and codecs
- Duration to a tenth of a second
- Resolution with name (720p, 1080p, 4K)
- Aspect ratio and megapixels
- Overall bitrate
- Audio-only or video detection
- Private, runs in your browser
Frequently asked questions
What is a codec?
A codec is the method used to compress the video or audio, such as H.264 for video or AAC for audio. The container, such as MP4, is the box that holds the compressed tracks.
Which files can it read?
MP4, M4V, MOV, MKV and WebM video, and MP3, M4A, AAC, WAV, OGG, Opus and FLAC audio. Old AVI and WMV files cannot be read in the browser.
How is the bitrate worked out?
It is the file size multiplied by eight and divided by the duration, so it includes video, audio and overhead. It is an average for the whole file.
Why is there no frame rate?
The reader used by this tool does not report frame rate. Use a desktop tool such as MediaInfo or ffprobe if you need it.
Will my video play everywhere?
The most widely supported combination is MP4 with H.264 video and AAC audio. Newer codecs such as HEVC and AV1 play on fewer devices.
Is the file uploaded?
No. It is opened in your browser and the details are shown on the page.
What does 1080p mean?
The picture is 1080 pixels high, usually 1920 by 1080. 720p is 1280 by 720, and 4K is 3840 by 2160.