Audio Normalizer
Free online audio normalizer. Standardize audio specifications: channels (mono/stereo), bitrate (CBR/VBR), samplerate (Hz). Optimize for podcast, YouTube, TikTok. Supports MP3, AAC, OPUS, WAV.
About Audio Normalizer
This online audio normalizer helps you standardize audio specifications for different platforms and use cases. Convert between mono and stereo, adjust bitrate for file size control, and change samplerate for compatibility. Perfect for optimizing audio for podcasts, YouTube, TikTok, music streaming, ringtones, and telephony systems.
What does this tool do?
This tool normalizes audio specifications: Channels (mono/stereo conversion, channel swapping), Bitrate (compression level for MP3/AAC/OPUS), and Samplerate (sampling frequency in Hz). It helps you prepare audio files that meet specific technical requirements for different platforms and devices.
When should I use the presets?
Podcast: Mono, 128 kbps, 48 kHz for speech clarity. Music: Stereo, 192 kbps, 44.1 kHz for streaming. YouTube: Stereo, 192 kbps, 48 kHz (video standard). Ringtone: Mono, 96 kbps, 44.1 kHz for mobile compatibility.
What is the difference between Mono and Stereo?
Mono has 1 channel - same sound in both ears, smaller file size, ideal for voice. Stereo has 2 channels - spatial effect, wider soundstage, better for music. Dual-Mono creates stereo by duplicating the mono channel to both left and right.
What is samplerate?
Samplerate (in Hz) is how many times per second audio is sampled. Higher = better quality but larger files. 8 kHz for telephony, 44.1 kHz for CD/music, 48 kHz for video, 96 kHz for hi-res audio. Most compatibility: 44.1 kHz or 48 kHz.
What is the difference between CBR and VBR?
CBR (Constant Bitrate) maintains fixed bitrate throughout - predictable file size, good for streaming. VBR (Variable Bitrate) adjusts bitrate based on complexity - better quality at similar average file size, ideal for music.
What codec should I choose?
MP3: Universal compatibility, good for everything. AAC: Better quality than MP3 at same bitrate, Apple/YouTube prefer this. OPUS: Modern, best quality at low bitrates, great for speech. WAV: Uncompressed, large files, lossless.
How does changing samplerate affect quality?
Downsampling (e.g., 48 kHz → 44.1 kHz) slightly reduces quality but saves space. Upsampling (e.g., 44.1 kHz → 48 kHz) doesn't improve quality but ensures compatibility. Use 'High' resample quality for best results when changing samplerate.
What is the file size limit?
The maximum file size is 50MB for smooth browser processing.
Is my audio file safe?
Absolutely! All processing happens in your browser using FFmpeg.wasm. Your file is never uploaded to any server.