Video & Image File Inspector
Resolution, aspect ratio, duration and bitrate, read locally.
- Runs entirely in your browser
- Nothing is uploaded
- Works offline once loaded
What it tells you
- Resolution — exact pixel dimensions.
- Aspect ratio — simplified, so you can see at a glance whether it is 9:16, 16:9 or something unusual.
- Duration — for video, in minutes and seconds.
- Average bitrate — calculated from file size and duration.
- Orientation — portrait, landscape or square.
- Megapixels — for images.
Why check before uploading
Platforms re-encode anything that does not match their expected specification, and that re-encode is where quality is lost. Knowing what you actually have tells you whether a file will be accepted as-is or crushed on the way in.
It is also the fastest way to diagnose a file that looks wrong. A video that appears letterboxed usually has an unexpected aspect ratio; one that looks soft usually has a low bitrate for its resolution.
Making sense of bitrate
Bitrate is how much data is used per second of video, and it is the single biggest factor in visual quality at a given resolution. The figure here is an average across the whole file — most modern encoders vary the rate throughout, spending more on complex scenes.
- 1080p — 8 to 12 Mbps is normal for good quality
- 4K — 35 to 45 Mbps
- 720p — 4 to 6 Mbps
A 1080p file at 2 Mbps will look soft no matter what you do with it, because the detail was discarded when it was encoded.
Frequently asked questions
Why is the bitrate an average?
It is calculated from total file size divided by duration, which is the only measurement available from a browser. Real encoders vary the bitrate scene by scene, so the instantaneous rate at any moment may be higher or lower.
Can it show the codec?
Not reliably. Browsers expose dimensions and duration but not detailed codec information. For that you need a desktop tool such as MediaInfo.
Is my file uploaded anywhere?
No. This tool runs entirely in your browser using the File API and a canvas element. Your file is read from your own device, processed on your own hardware, and returned to you.
You can verify this: load the page, disconnect from the internet, then use the tool. It will work normally. A tool that uploaded your file could not.
It will not open my file
Browsers can only decode certain formats natively. HEIC photos from an iPhone, camera RAW files and some older video codecs cannot be opened by a browser at all.
Converting to JPEG or MP4 first will usually solve it.
Every SnapView tool runs inside your browser. Files you open here are read by your own device and are never uploaded, stored or transmitted anywhere. You can disconnect from the internet after this page loads and the tools will still work — which is the simplest way to verify that claim for yourself.