Spek
Inspect an audio file as a spectrogram to compare frequency content and spot possible encoding artefacts.
What’s included for free?
Open-source local acoustic spectrum analyser; no upload credits, account or analysis subscription.
Provider information ↗Checked 2026-10-13
Before you use it
GPL-3.0 software with separately licensed decoding dependencies.
Provider terms can change. Check current pricing and usage rights before starting a project.