All the features. None of the catches.
A premium MP4 to MP3 toolkit, free for everyone.
In-browser conversion
Everything happens on your device. Your files never reach a server, ever. The most private way to convert MP4 into MP3.
Batch processing
Drop in 50 files at once. We process them sequentially with the same settings, then let you download all with one click.
320 kbps studio MP3
Encode at up to 320 kbps CBR — equivalent to CD quality. Pick lower bitrates when you need smaller files.
6 output formats
MP3, WAV, AAC (M4A), OGG Vorbis, Opus, and FLAC. Lossy or lossless — whatever fits your workflow.
15 EQ presets
Bass Boost, Treble Boost, Vocal, Podcast, Pop, Rock, Classical, Jazz, Electronic, Warm, Bright, Deep, Cinema and more — one click for studio sound.
Bass & Treble sliders
Independent ±10 dB bass and treble controls so you can fine-tune the tone after applying any preset.
Pitch shift ±12 semitones
Shift pitch up or down a full octave each way, completely independent of speed. Ideal for transposing songs.
Karaoke (vocal remover)
Center-channel cancellation removes most lead vocals from a stereo track — instant karaoke from any MP4 music video.
Smart silence trim
Auto-detects and removes silence at the start and end of your audio. Perfect for tightening up screen recordings.
Auto cover art
Extracts a frame from your MP4 (you choose the timestamp) and embeds it as the MP3 album art automatically.
Custom cover art upload
Prefer your own image? Upload a JPG/PNG/WebP and we’ll embed it as the cover for your MP3.
Split into segments
Cut a long file into many MP3 parts every 30 sec, 1 min, 2 min, 5 min, 10 min, or any custom interval.
A/B original vs output
Listen to the original audio next to the converted MP3 with one toggle to verify the output sounds right.
Audio trimming
Crop to a specific section. Set start and end times in seconds — perfect for ringtones or sound bites.
Loudness normalization
Apply EBU R 128 normalization for consistent volume across episodes — a podcaster favorite.
Volume adjust
Boost or attenuate by ±20 dB. Useful for whispered audio or videos with very quiet narration.
Speed control
Speed up or slow down between 0.5× and 2× while preserving pitch.
Reverse audio
Play your audio backwards. Great for music production and creative experiments.
Fade in & fade out
Add smooth fades up to 10 seconds at the start or end for professional-sounding clips.
ID3 metadata editor
Embed title, artist, album, year, and genre right inside the MP3 — your music app will pick them up automatically.
Mono/Stereo + sample rate
Mix down to mono or keep stereo. Choose 22.05/32/44.1/48 kHz to match your destination.
Mobile-first design
Tested on iPhone and Android. Works in Safari, Chrome, Firefox, Edge, and Samsung Internet.
Offline mode
After the first visit the conversion engine is cached. You can convert without an internet connection.
No account required
No email, no password, no profile. Just open the page and convert.
No size or count limits
Convert one file or fifty, 5 MB or 5 GB — limited only by your device’s memory.
WebAssembly engine
A highly-optimized engine compiled to WebAssembly delivers near-native conversion speed in your browser.
Smart format detection
We auto-detect over 25 input formats and pick the best decoding path — you don’t have to think about it.
Lightning-fast UI
No waiting for an upload. The moment your file is dropped, encoding can begin.
Available worldwide
Cloudflare’s global network puts the site close to you, wherever you are.
Built-in preview player
Listen to the converted audio right inside the page before downloading.
Persistent preferences
Your dark/light mode and recently used settings are remembered between visits.