Free online audio converter
Audio files arrive in whatever format the recording app or download chose: M4A from an iPhone voice memo, OPUS or OGG from a messaging app, WAV from a recorder, FLAC from a music library. These converters turn them into the format your player, editor, or upload form expects — usually MP3 — using an FFmpeg build that runs inside your browser.
Beyond format changes, you can trim a clip, merge several files, make a quiet recording louder, normalize volume, change speed or sample rate, reduce background noise, or record your own voice. Keep a lossless original when you expect to edit the audio again.
32 audio converter tools
WAV to MP3Shrink big WAV files into portable, high-quality MP3s.M4A to MP3Convert Apple M4A/AAC audio to universal MP3.MP4 to MP3Extract MP3 audio from MP4 video.FLAC to MP3Convert lossless FLAC to portable MP3.Trim AudioCut a clip from any audio file with a preview player.Compress AudioShrink audio files by choosing a lower bitrate.MP3 to WAVTurn compressed MP3s into uncompressed WAV audio.OGG to MP3Convert Ogg Vorbis audio to universal MP3.AAC to MP3Convert AAC audio streams to universal MP3.Opus to MP3Convert Opus voice and music files to MP3.WebM to MP3Extract MP3 audio from WebM files.AMR to MP3Convert AMR voice recordings to MP3.Increase VolumeMake a quiet recording louder.Merge AudioJoin several audio files into one MP3.Change Audio SpeedSpeed up or slow down audio without changing pitch.M4R Ringtone MakerTurn any audio into a 40-second iPhone ringtone.Normalize AudioReach a consistent listening level with LUFS normalization.Fade AudioAdd smooth starts and endings.Audio to MonoMix every channel into one.Audio to StereoCreate a two-channel compatible file.Change Sample RateResample audio from 8 kHz to 48 kHz.Change Audio BitrateControl MP3 quality and file size.Reduce Audio NoiseQuiet steady hiss and room noise.Remove SilenceCut quiet gaps automatically.Split AudioExport timestamped sections as a ZIP.Audio WaveformTurn sound into a downloadable PNG waveform.Audio MetadataInspect duration, channels, sample rate, type, size, and bitrate.Remove Audio MetadataExport a clean copy without embedded tags.Audio RecorderCapture your microphone and export MP3 or the original recording.Offline Text to SpeechCreate a downloadable spoken WAV file with a local synthesizer.Media Metadata & Cover Art EditorEdit normalized audio and video tags, lyrics, comments, dates, track numbers, and embedded cover artwork without unnecessary re-encoding.Audio Analysis LabMeasure loudness and peaks, find silence, and render a high-resolution frequency spectrogram.
Audio converter questions
128 kbps is fine for speech and podcasts, 192 kbps is a good default for music, and 320 kbps is the highest MP3 bitrate if you want the least audible compression.
Yes, slightly. MP3 is a lossy format, so some detail is discarded to make the file smaller. Keep the WAV or FLAC original if you might need the full-quality audio later.
The audio engine is downloaded the first time you use an audio tool. Your browser can reuse the cached copy on later visits, so subsequent conversions start faster.