Make an audio file smaller
Compress MP3, WAV, M4A, FLAC, or OGG input to an MP3 bitrate suited to listening, voice, or smaller sharing files.
Compress audio online →Private audio tools
Free audio tools with local processing
Convert or compress common audio formats directly in your browser. Recordings remain on your device while the page creates a new MP3 or WAV download.
Choose an audio workflow
Extract audio from video
Discard the picture from an MP4 and save its soundtrack as a 192 kbps MP3.
Convert MP4 to MP3 →Convert a recording to MP3
Create broadly compatible MP3 copies from WAV, M4A, FLAC, or OGG source files.
Convert M4A to MP3 →Create a WAV copy
Decode an MP3 to WAV for editors or workflows that specifically require a WAV container.
Convert MP3 to WAV →All private audio tools
- MP4 to MP3 Convert an MP4 soundtrack to a 192 kbps MP3 without uploading the video. The picture is discarded, and the MP3 can only be as good as the audio already inside the source file.
- WAV to MP3 Turn large WAV recordings into smaller MP3 files for sharing, upload forms, and everyday playback. MP3 is lossy, so keep the WAV if you need the original recording quality.
- M4A to MP3 Make MP3 copies of M4A voice memos, phone recordings, and iTunes-style audio for apps that prefer the most universal format. Re-encoding from one lossy format to another can lose a little quality.
- FLAC to MP3 Create portable MP3 copies from a lossless FLAC library for phones, cars, speakers, and apps that do not handle FLAC well. The tradeoff is smaller files with lossy compression.
- OGG to MP3 Turn OGG files from games, open-source tools, and web audio projects into MP3 for broader playback. Because this is often lossy-to-lossy, expect a small quality tradeoff.
- MP3 to WAV Create WAV files from MP3 audio for editors, DAWs, transcription tools, and workflows that expect PCM. This does not restore quality lost in the MP3, and the WAV will usually be much larger.
- Compress Audio Shrink audio to MP3 with fixed bitrate presets. No upload.
How local audio conversion works
Audio tools use ffmpeg compiled to WebAssembly. The engine downloads to the browser, reads the selected file locally, and writes the converted output into browser memory.
Conversion cannot restore detail already lost from a compressed source. Keep an original WAV or other master file when archival or editing quality matters.
Want the technical details? See how local browser processing works.