Tonalux Audio Analyzer review
A free browser tool for private file analysis, not real-time monitoring.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Tonalux Audio Analyzer is a free browser-based tool for checking recorded audio files, aimed at audio professionals, producers, and sound designers who want file analysis without sending audio to a service. It accepts MP3, WAV, FLAC, AAC, and OGG. Tonalux says processing takes place locally in the browser, so files are not uploaded. That makes it a fit for users who prioritize private, browser-based checks over a real-time monitoring workflow.
The analysis covers a broad set of file-level measurements: integrated loudness (LUFS), true peak, short-term maximum loudness, loudness range, RMS level, crest factor, phase correlation, and peak dBFS. Separate views show frequency spectrum and stereo field, with stereo width, tempo, and musical key detection also included. Streaming-platform loudness targets help contextualize loudness readings. This combination makes the tool useful for reviewing a mix or finished track across several dimensions in one browser interface, rather than focusing only on loudness or only on spectral display.
The central limitation is scope: Tonalux is for offline file analysis and does not offer real-time analysis or plug-in support. Its published positioning is a web tool, with no indication here of a more established desktop or plugin workflow. Choose it if free, local-browser checks of audio files meet your needs; look elsewhere if you need live analysis in a recording or mixing session, or plugin-based integration. For solo users and small teams looking for a quick browser check, its range of measurements is the draw; it is less suited to workflows built around ongoing real-time monitoring.
Tonalux Audio Analyzer pros and cons
- Where it wins
- Analyzes MP3, WAV, FLAC, AAC, and OGG files locally in the browser
- Reports LUFS, true peak, loudness range, RMS, and crest factor
- Combines spectrum and stereo views with tempo and key detection
- Where it doesn't
- Analyzes recorded files rather than offering real-time analysis
- No plug-in support
- Browser-based workflow may not suit users seeking a dedicated desktop tool
Tonalux Audio Analyzer fact sheet, pricing and score →
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