Free video tool

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.

FreeNo sign-upRuns in browser

Browser metadata · no file uploadData handling

Privacy note: This tool is marked browser-side in the tool registry. Selected files are read with browser file APIs for this tool, so review content and output before sharing. No account is required for this public tool. Review data handling.

Free Toolbrowser-side processing

Video Info Inspector

Check local video file size, duration, dimensions, aspect ratio, type, extension, and estimated bitrate in your browser.

Drop video here or click to inspect

MP4, WEBM, MOV, and other browser-readable files work best.

Max file size: 500MB

No video selected

Video details

Use these values before compressing, converting, trimming, or preparing a cover image.

File size

Duration

Dimensions

Estimated bitrate

Aspect ratio

Unknown

Extension

MIME type

Unknown

Browser preview

This inspector reads browser video metadata and is designed for browser-side processing based on the current public implementation. It does not load ffmpeg.wasm.

Quick answer

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.

Best inputs

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.

Inspection method

The browser reads the selected file metadata and estimates bitrate from file size and duration.

Duration and dimensions depend on browser codec support.

Aspect ratio is simplified from width and height.

Estimated bitrate is useful for planning but not a stream-level probe.

Example, Assumption, and Limitation

Use the result as a practical estimate or transformation, then confirm edge cases for critical work.

Example

Upload a 45MB MP4 and confirm it is 1920 x 1080, 0:32 long, 16:9, and roughly 11 Mbps before compression.

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.

Before you use it

Check these points first so the output fits the next tool, editor, parser, or review step.

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 500MB are rejected before browser metadata is loaded.

Common mistakes to avoid

These checks help prevent bad outputs, failed exports, and confusing results.

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.

Common use cases

Use these scenarios to decide which input, assumption, or follow-up tool fits this specific task.

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.

Practical notes

Use these notes to decide when browser-side cleanup is enough and when to switch to project tooling.

Bitrate formula

Estimated kbps = file size in bytes x 8 / duration in seconds / 1000. A 45MB, 32-second file is roughly 11.8Mbps.

Aspect ratio method

Width and height are reduced by their greatest common divisor, so 1920 x 1080 is shown as 16:9.

Difference from Video Duration Calculator

Inspector reads one file's metadata. Video Duration Calculator adds manually entered runtimes across many clips.

Frequently asked questions

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 500MB. Browser codec support can still prevent duration and dimension reading for a smaller file.

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.