Audio File Info Viewer Online

Audio metadata is technical information about an audio file — its duration, bitrate, sample rate, channel configuration, and format. Understanding these specs helps you make informed decisions about audio quality, compatibility, and processing.

Our audio file info viewer extracts this information instantly using the Web Audio API — no upload, no processing, just instant results.

When to Check Audio Metadata

• Verify audio quality before adding tracks to your DJ library
• Check if an MP3 is genuine 320kbps or a re-encoded lower quality file
• Confirm sample rate compatibility before loading into a DAW
• Check if a file is mono or stereo before using in a mix
• Estimate file size reduction when converting formats

Here's what each piece of metadata means and why it matters:

A common issue in DJ libraries is re-encoded audio — a low-quality file that has been converted to a higher bitrate, making it appear to be high quality. The file size and bitrate will show 320kbps, but the actual audio quality is much lower.

Signs of a re-encoded file:

• Bitrate shows 320kbps but the file sounds muffled or lacks high frequencies
• File size is smaller than expected for a 320kbps file of that duration
• Use our Frequency Analyzer to check — re-encoded files show a sharp cutoff in the high frequencies

The estimated bitrate shown by this tool is calculated from file size and duration — it reflects the actual encoded bitrate, not a claimed value.