Free Audio Format Converter and Trimmer

Back To Tools Audio Converter
Client-side · Zero upload
Drop your audio file here Audio files only (.mp3, .wav, .flac, .m4a, .aac, .ogg)
MP3 WAV AAC FLAC OGG M4A OPUS AIFF ALAC M4R
Quick Quality Presets
Audio Settings
Detected Input
Auto (None)
Target Output
MP3 (MPEG)
MP3 (MPEG Audio)Popular
WAV (PCM)Lossless
AAC (Audio Coding)High Quality
FLAC (Lossless)Lossless
OGG (Vorbis)Open Source
M4A (Apple MPEG)Apple
OPUS (Interactive)Ultra-low bit
WMA (Windows)Windows
AIFF (Audio Int.)Uncompressed
ALAC (Apple Lossless)Apple
M4R (Ringtone)Ringtone
Audio Bitrate
320 kbps (Studio)
320 kbps (Studio)
256 kbps (Very High)
192 kbps (Standard)
160 kbps (Good)
128 kbps (FM)
96 kbps (Voice)
64 kbps (Speech)
Lossless (Auto)
Sample Rate
Keep original
Keep original
48,000 Hz (Studio)
44,100 Hz (CD)
32,000 Hz (FM)
22,050 Hz (Low)
16,000 Hz (Voice)
Channels
Keep original
Keep original
Stereo (2 Ch)
Mono (1 Ch)
Audio Codec
Auto / Recommended
Auto / Recommended
PCM
MP3
AAC-LC
FLAC
Opus
Vorbis
Volume Level
100%
Trim Audio
to
Normalize Audio
Fade In (1.5s)
Fade Out (1.5s)

Free Online Audio Converter — MP3, WAV, AAC, FLAC, OGG, M4A

Convert audio files between popular formats directly in your browser. Trim audio tracks, normalize volume levels, adjust bitrates (up to 320 kbps), and change sample rates without uploading files to remote servers.

ShiftTools Audio Converter runs locally using the Web Audio API — offering instant conversion speed, 100% privacy, and zero file size limits.

How to Convert Audio Files

  1. Drag and drop your audio file into the dropzone or click to select a file.
  2. Choose target output format (MP3, WAV, AAC, FLAC, OGG, M4A, OPUS, AIFF).
  3. Set audio quality settings (bitrate, sample rate, channels, audio normalization).
  4. Use the waveform trimmer to select start and end points if needed.
  5. Click Convert Audio Now and save your processed audio track instantly.

Frequently Asked Questions

No. All audio decoding, volume normalization, trimming, and encoding happen locally inside your browser thread via Web Audio API.
MP3, WAV, AAC, FLAC, OGG, M4A, OPUS, AIFF, ALAC, and M4R formats are supported.
Audio normalization automatically adjusts peak volume levels across the track to eliminate quiet audio without introducing clipping distortion.
44,100 Hz is the standard for music. 48,000 Hz is standard for video/broadcast. 22,050 Hz is sufficient for speech at smaller file sizes.
Noise removal is not currently supported — the tool focuses on format conversion and basic editing like trimming and normalization.
Stereo has two audio channels (left and right). Mono combines them into one — useful for voice recordings and reduces file size by ~50%.
Batch conversion is on the roadmap. Currently the tool processes one file at a time with full control over each conversion.