No upload · No server · 22 formats to MP3
MP3 Converter
Convert WAV, FLAC, OGG, M4A, AAC, WMA, MP4, or MOV to MP3 — or convert MP3 to any format. Everything runs in your browser, nothing is uploaded. Free.
MP3 converter at a glance
Pick the converter for your file below. 22 formats convert to MP3, from WAV, M4A and FLAC to the soundtracks of MP4, MOV and MKV videos and rarer files such as AMR and APE. MP3 itself converts to WAV, FLAC, M4A, AAC, OGG, Opus and iPhone ringtones. Files are converted in your browser and never uploaded.
- Default quality — 320 kbps; pick 128–192 kbps for smaller files or speech.
- Video files — the soundtrack becomes an MP3 and the video is dropped.
- MP3 is lossy — keep your WAV or FLAC originals and convert copies.
- MP3 to WAV does not improve quality; it helps when an editor needs WAV.
Convert to MP3
Turn any audio or video file into a universally compatible MP3.
M4A to MP3
M4A→ MP3
Convert iPhone voice memos and iTunes files to universal MP3.
WAV to MP3
WAV→ MP3
Compress lossless WAV recordings to shareable MP3 files.
OGG to MP3
OGG→ MP3
Turn OGG Vorbis files into widely compatible MP3 audio.
FLAC to MP3
FLAC→ MP3
Export FLAC archives to lightweight MP3 for everyday playback.
MP4 to MP3
MP4→ MP3
Extract the audio track from MP4 video files as an MP3.
MOV to MP3
MOV→ MP3
Rip audio from QuickTime MOV recordings and screen captures.
AAC to MP3
AAC→ MP3
Convert AAC audio — common on Apple devices — to MP3.
WMA to MP3
WMA→ MP3
Rescue old Windows Media Audio files into playable MP3.
AIFF to MP3
AIFF→ MP3
Convert Apple lossless AIFF masters to compact MP3.
Opus to MP3
Opus→ MP3
Convert Opus voice and streaming audio to MP3.
WebM to MP3
WebM→ MP3
Pull the soundtrack out of a WebM video, the format of many browser and screen recordings.
MKV to MP3
MKV→ MP3
Extract the audio from an MKV video as an MP3.
AVI to MP3
AVI→ MP3
Get an MP3 from older AVI videos from cameras and Windows editors.
MPEG to MP3
MPEG→ MP3
Extract the audio from MPEG (.mpg) videos, such as old DVD rips and camcorder files.
WMV to MP3
WMV→ MP3
Save the sound from a Windows Media Video file as an MP3.
FLV to MP3
FLV→ MP3
Rescue the audio from old Flash Video (.flv) files.
3GP to MP3
3GP→ MP3
Get the audio from 3GP videos recorded on older phones.
M4B to MP3
M4B→ MP3
Turn an M4B audiobook into an MP3 for players that do not read M4B.
AMR to MP3
AMR→ MP3
Convert AMR voice recordings from phones and dictaphones to MP3.
CAF to MP3
CAF→ MP3
Convert Apple Core Audio (.caf) files from Mac apps to MP3.
AC3 to MP3
AC3→ MP3
Turn Dolby Digital (AC3) audio from DVDs and TV recordings into an MP3.
APE to MP3
APE→ MP3
Convert lossless Monkey's Audio (.ape) files to MP3 for phones and cars.
Convert from MP3
Need a different format? Start from your MP3 and convert to WAV, FLAC, OGG, and more.
MP3 to WAV
MP3 → WAV
Decode MP3 to uncompressed WAV for editing in a DAW.
MP3 to FLAC
MP3 → FLAC
Wrap MP3 in a lossless container for archiving or re-encoding.
MP3 to OGG
MP3 → OGG
Convert MP3 to OGG Vorbis for open-source and web use.
MP3 to M4A
MP3 → M4A
Convert MP3 to M4A (AAC) for Apple devices and iTunes.
MP3 to AAC
MP3 → AAC
Re-encode MP3 to AAC for streaming and mobile playback.
MP3 to Opus
MP3 → Opus
Convert MP3 to Opus for efficient web and VoIP delivery.
MP3 to M4R
MP3 → M4R
Make an iPhone ringtone (.m4r) from an MP3.
About the MP3 Format
MP3 is the world's most compatible audio format. Born from the MPEG-1 Audio Layer III specification in 1992, it works on every device — phones, cars, smart speakers, laptops — and is accepted by every platform and streaming service.
MP3 achieves small file sizes through perceptual encoding: it analyzes the audio and discards data that human hearing is unlikely to detect. The trade-off is quality. At 128 kbps it is perfectly adequate for voice recordings and podcasts. At 192 kbps the difference from the original is minimal for music. At 320 kbps it is near-transparent to most listeners.
The main downside: MP3 is lossy. Once audio is compressed, the discarded data cannot be recovered. Best practice is to keep your lossless originals — WAV or FLAC — and export to MP3 only for distribution, sharing, or upload.
Why no-upload MP3 conversion matters
Most online converters work by uploading your file to their servers, converting it, then sending it back. That means your music drafts, voice memos, podcast recordings, and unreleased tracks pass through infrastructure you do not control — and may be stored or logged. AudioUtils is different: FFmpeg runs as WebAssembly entirely inside your browser. Your files are processed locally and never leave your device. No server logs, no third-party storage, no privacy risk.
Frequently Asked Questions
Is this MP3 converter free?
Yes. AudioUtils is free to use. The free tier covers 5 conversions a month, files up to 20 MB, and outputs the first 10 seconds as a preview. Pro ($9/month) removes the preview and the monthly cap, and takes files up to 500 MB.
What formats can I convert to MP3?
You can convert 22 formats to MP3: WAV, FLAC, OGG, M4A, AAC, WMA, AIFF, Opus, M4B audiobooks, AMR, CAF, AC3 and APE, plus the soundtracks of MP4, MOV, MKV, WebM, AVI, MPEG, WMV, FLV and 3GP videos. All conversions run entirely in your browser using FFmpeg WebAssembly.
Does converting to MP3 reduce quality?
Yes. MP3 is a lossy format — it discards audio data to reduce file size. At 192 kbps the difference from the original is minimal for music. At 128 kbps it is fine for voice and spoken word. If you need to preserve quality, keep your lossless originals (WAV or FLAC) and only export to MP3 for distribution.
Can I convert MP3 to other formats?
Yes. AudioUtils can convert MP3 to WAV, FLAC, OGG, M4A, AAC, and Opus. Use the 'Convert from MP3' section below to find the right converter.
Will my music files be kept private?
Yes. AudioUtils uses FFmpeg compiled to WebAssembly, which runs entirely inside your browser. Your files are never uploaded to any server — they never leave your device. There are no server logs and no third-party storage.