Normalize audio loudness to Spotify/YouTube/Podcast/Broadcast targets via peak or LUFS — entirely in-browser.
Drop an audio file here or click to browse
WAV, MP3, OGG, M4A, FLAC, WebM Opus.
Loudness analysis and normalization run entirely in your browser. Audio never leaves the page.
Trim, resample, mono/stereo, gain, fade — convert any audio to 16-bit WAV right in your browser.
Detect the tempo (BPM) of any song or beat by analyzing peak intervals — runs entirely in your browser.
Convert any text to speech using your browser's built-in voices. 50+ languages, runs offline once voices are installed.
Audio normalization adjusts the overall volume of an audio file so it matches a target loudness or peak level. The reason it matters: most platforms now enforce a loudness standard — Spotify and YouTube target -14 LUFS, Apple Music targets -16 LUFS, EBU R128 broadcast targets -23 LUFS — and they automatically attenuate any track that exceeds those numbers, so a song mastered "louder" to stand out actually plays back quieter. The right answer is to deliver content already at the target. This tool analyses your file using peak amplitude, RMS energy, and an ITU-R BS.1770-style K-weighted integrated LUFS estimate, then applies a single global gain so the output hits whichever target you choose. Two modes are available: Peak normalization (simple — scale so the loudest sample reaches -1 dBFS, useful for monitor balance) and Loudness normalization (LUFS — what streaming platforms actually measure, with a peak ceiling so the limiter never clips). All processing is 100% in-browser; nothing is uploaded.
Peak normalization scales by (target_peak − measured_peak) dB. It is mathematically exact and fast, but two files at the same peak can still feel very different in loudness because crest factor varies. LUFS normalization scales by (target_LUFS − measured_LUFS) dB, matching how the ear perceives loudness across content. Use LUFS for music, podcasts, and any content destined for a platform; use Peak when you only care about preventing clipping on a monitor chain. The peak-ceiling option in LUFS mode prevents the limiter from being pushed above your chosen ceiling even if the LUFS target would require more gain.