Free in-browser audio compressor, voice recorder, trimmer, volume booster, and pitch shifter.
Generate continuous audio test frequencies from 20 Hz to 20,000 Hz using sine, square, sawtooth, and triangle waves.
Record audio voice notes directly in your browser with real-time frequency visualizer and instant WebM download.
Compress audio files (MP3, WAV, OGG, AAC) in your browser with sample-rate downsampling and mono downmixing.
Cut, trim, and split audio files online with millisecond precision and instant local WAV download.
Boost quiet audio recordings up to 400% with built-in limiter protection and peak normalization.
Speed up or slow down audio files from 0.5x to 2.5x speed with instant local WAV download.
Reverse any song, voice note, or sound effect in memory to play and export it backwards.
No. Every audio utility—including the Audio Compressor, Voice Recorder, and Trimmer—runs 100% inside your browser using the HTML5 Web Audio API. Your speech, confidential meetings, and songs never leave your computer or phone.
By downsampling sample rates (e.g. from 44.1kHz to 32kHz or 22kHz) and converting stereo recordings to mono, you can reduce audio file sizes by up to 50% to 75% without noticeable loss in voice clarity.
You can upload MP3, WAV, AAC, OGG, FLAC, and WebM files. The tools decode the audio streams directly in browser memory and export standard, universally compatible WAV files.