AscendLab

Video tools

Video Info Inspector

Free video tool

Private 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.

Free ToolNo upload
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

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Duration

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Dimensions

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Estimated bitrate

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Aspect ratio

Unknown

Extension

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MIME type

Unknown

Browser preview

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The file stays on your device. This inspector uses browser metadata only and does not upload the video or 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.

Common use cases
These pages are built for lightweight browser-side work, examples, and planning.

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 privacy

Inspect unpublished video without using a third-party metadata service.

Frequently asked questions

Does this video info inspector upload my file?

No. The selected video is read in your browser and is not sent to a backend.

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.

Suggested workflow

Build a video preparation workflow

Inspect first, then choose the right browser-side video action.

Step 1
Inspect video
Read duration, dimensions, and estimated bitrate.
Open tool
Step 2
Compress video
Reduce file size when the source is too large.
Open tool
Step 3
Convert or trim
Export MP4/WebM or cut the useful range.
Open tool