Browser-Side Video Info Inspector
Inspect a local video before compressing, converting, trimming, muting, extracting audio, or making a GIF. This page reads browser metadata and does not load ffmpeg.wasm.
Drop video here or click to inspect
MP4, WEBM, MOV, and other browser-readable files work best.
Max file size: 500 MiB
No video selected
File size
-
Duration
-
Dimensions
-
Estimated bitrate
-
Aspect ratio
Unknown
Extension
-
MIME type
Unknown
Browser preview
-
A video info inspector shows file size, duration, dimensions, aspect ratio, type, extension, and estimated bitrate.
This page is lighter than conversion tools because it uses browser metadata instead of ffmpeg.wasm.
Browser-readable files
MP4, WebM, and MOV are the safest choices for duration and dimension reading.
Planning before processing
Check size, duration, and resolution before choosing compression, GIF, or trimming settings.
Example
For a 45,000,000-byte (45 MB) MP4 lasting 32 seconds, the estimated total bitrate is 11.25 Mbps. Read dimensions and aspect ratio from the selected file.
Assumption
The browser can decode enough metadata from the selected video to report duration and dimensions.
Limitation
This tool does not inspect codec names, frame rate, subtitles, audio tracks, or exact stream bitrates.
Use a browser-readable container
MP4, WebM, and MOV are the best first choices; accepting a filename does not guarantee the current browser can decode its codec.
Interpret bitrate correctly
The estimate uses the whole file size, so it includes audio, container overhead, and other streams rather than isolating video bitrate.
Stay under the inspector limit
Files over 500 MiB are rejected before browser metadata is loaded.
Reading total bitrate as video bitrate
File bytes x 8 / duration estimates the whole-file rate, not the encoded bitrate of one video stream.
Trusting the extension as codec proof
A .mp4 or .mov suffix identifies a container; the browser can still reject the video or audio codec inside it.
Expecting a full media probe
This lightweight page does not enumerate codecs, frame rate, rotation tags, color profile, subtitles, chapters, or audio tracks.
Compression planning
Check whether a video needs resolution or bitrate reduction.
GIF planning
Pick a short range after checking duration and dimensions.
Upload QA
Confirm file type, size, and aspect ratio before uploading.
Local review
Inspect unpublished video metadata with browser-side processing before choosing a heavier workflow.
Bitrate formula
Estimated kbps = file size in bytes × 8 ÷ duration in seconds ÷ 1000. At 32 seconds, 45 MB (45,000,000 bytes) is 11.25 Mbps; 45 MiB (45 × 1,048,576 bytes) is about 11.80 Mbps. This includes the whole file, not only its video stream.
Aspect ratio method
Width and height are reduced by their greatest common divisor, so 1920 x 1080 is shown as 16:9.
One file at a time
Inspector reads one file's metadata. To plan a sequence, record and add the durations in your editor; this page does not combine a playlist.
How is the video inspected?
The selected video is read through browser metadata APIs based on the current public implementation. Avoid using sensitive media unless you have reviewed the implementation.
Does it load ffmpeg.wasm?
No. This inspector uses browser metadata only, so it stays lighter than conversion tools.
Why are some values unavailable?
If the browser cannot decode the video container or codec, duration and dimensions may be unavailable.
Is the bitrate exact?
The bitrate shown is an estimate based on file size and duration. Actual video and audio stream bitrates may differ.
What is the file-size limit?
The inspector rejects files over 500 MiB. Browser codec support can still prevent duration and dimension reading for a smaller file.
Suggested workflow
Build a video preparation workflow
Inspect first, then choose the right browser-side video action.