Free browser audio tools for measuring, testing and planning

Choose the tool that matches your job: check a speaker, inspect a recording, look up a note, generate a reference signal, calculate timing or plan file storage. Each tool runs in your browser.

Privacy: File analysis and calculations run on your device. The Spectrum Analyzer and Pitch Detector request microphone access when you choose live input. Microphone Test requests access when you start the test.

Choose the right audio tool

Check speakers and channels

Find frequencies and musical notes

Generate a reference signal

Calculate tempo and note times

Measure a file and plan storage

A practical order for a finished audio file

1. Inspect the spectrum if you hear hum, harshness or an unexplained tone.
2. Measure loudness across the complete finished file, then read LUFS and true peak together.
3. Calculate delivery size after choosing the final format, sample rate, bit depth or bitrate.
4. Use generated signals only for playback checks. A tone or channel test diagnoses routing; it does not repair the source file.

Need the concepts behind these readings and controls? The Audio Fundamentals guides explain frequency, musical pitch, note timing and noise types before you choose a tool.