Does Media Duration Analyzer upload my data?

Your media stays on your device. This page downloads the FFmpeg WebAssembly engine; files are never uploaded.

How do I use Media Duration Analyzer?

1. Drop a media file (audio or video) into the tool. 2. Wait for analysis to finish (no conversion happens). 3. Read the displayed duration and seconds total. 4. Use the stream list to sanity-check what tracks are inside.

What are common mistakes with Media Duration Analyzer?

Assuming this edits the file (it only reads metadata). Corrupted or partially downloaded media may not report duration. Very large files can be slow or memory-heavy in the browser.

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Media Duration Analyzer

Check audio/video duration instantly. No upload. No conversion.

Loading FFmpeg core...

Format-Specific Guides

MP4 Duration MP3 Duration MOV Duration WAV Duration AVI Duration FLAC Duration MKV Duration

No upload. Everything runs locally in your browser.

This tool uses ffmpeg.wasm. Package licenses in this project include @ffmpeg/ffmpeg (MIT) and @ffmpeg/core (GPL-2.0-or-later).

Media Duration Analyzer: Guide

Intent: Check audio or video duration online without uploading: drop a file to see exact length (HH:MM:SS and total seconds). Great for quick media preflight.
What it does: Uses FFmpeg logs to read metadata and display duration, format, bitrate hints, and stream lines.
Key features: Duration in HH:MM:SS.xx, Seconds total, Local-only analysis
Privacy: Your media stays on your device. This page downloads the FFmpeg WebAssembly engine; files are never uploaded.
Best for: Editors verifying clip length for ads, reels, or client delivery requirements
Podcasters checking episode duration before publishing or uploading
Anyone searching 'video duration checker' who prefers local analysis (no upload)
Why this tool: Local-first metadata read: no conversion and no uploads
Shows HH:MM:SS.xx plus total seconds for precise checks
Pairs well with bitrate checkers and trimming tools when something looks off