Audio File Analyzer
See any file's format, sample rate, bit depth, bitrate, true peak and LUFS at a glance. 100% in your browser, nothing uploaded.
What the analyzer tells you
Every audio file carries a set of technical specs that decide how it should be used. For an uncompressed WAV, this tool reads the sample rate and bit depth directly from the file header — 24-bit / 44.1 kHz is the working standard for mixing and mastering, while 16-bit / 44.1 kHz is the final delivery and CD standard. For lossy files like MP3 and AAC, there is no fixed bit depth; their quality is described by bitrate instead, which the analyzer estimates from the file, so you can tell a 320 kbps export from a 128 kbps one. It also reports channels, duration and file size, so you can confirm a file is what you think it is before you send it to a distributor, a collaborator or a mastering step.
Beyond the container specs, it measures the two numbers that actually decide whether a file is release-ready: true peak (dBTP) and integrated LUFS, using the same ITU-R BS.1770 analysis as a mastering engine. A file peaking over -1.0 dBTP risks distortion after streaming re-encoding, and a file far from the -14 LUFS streaming target will be turned up or down at playback. Everything runs locally with the Web Audio API, so it works on unreleased demos, private stems and AI-generated exports, nothing uploaded. If the numbers are off, TrackGleam's free mastering fixes loudness and true peak and shows you the corrected figures.
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FAQ
How do I check sample rate and bit depth?
Drop the file in. For WAV it reads sample rate and bit depth from the header; for MP3 and other lossy formats it reports sample rate and average bitrate (lossy files have no fixed bit depth). It also shows channels, duration, true peak and LUFS.
Does this upload my file?
No. The header is read and the audio decoded entirely in your browser — nothing is sent to a server. It works on unreleased and private files.
Why does bit depth matter?
It sets the noise floor and dynamic range of an uncompressed file. 24-bit is standard for mixing/mastering (headroom for processing); 16-bit is the CD/delivery standard. Lossy MP3/AAC have no bit depth — quality is described by bitrate.
What sample rate should my audio be?
44.1 kHz is the streaming/CD standard and all you need for release. 48 kHz is common for video. Higher rates (96 kHz) are used in production for headroom, but you deliver at 44.1 or 48 kHz.