Audio Spectrogram Lab
See the frequencies in an audio file over time. Compare spectrogram settings and download charts for closer study.
What does an audio spectrogram show?
A spectrogram maps time horizontally and frequency vertically, with color representing relative signal strength. It helps reveal tones, transients, background noise, and other patterns in a recording.
Your result
A little clarity, right here.
Choose a file and run the tool. Your result will appear here, ready to download.
Three simple steps
How to use Audio Spectrogram Lab
Choose your input and review the processing notice.
Send the job to the isolated processing service.
Review the result and download your export.
Common questions
Good to know
Understand the result.
Keep the original.
Is this tool free, and are my files uploaded?
This tool is free with no account required. When you run the tool, your input goes to a separate processing service. Temporary files are deleted when the job ends. You can download the result to your device.
What are the limits and details?
Recordings are converted to mono and limited to the first five minutes. Values are relative decibels, not calibrated sound pressure levels or a medical hearing test.
Limits: one file up to 8 MB; 500,000 characters per text field. One job runs at a time on the worker, with a two-minute limit.