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AAC to MP3 Converter

Drop a AAC file, choose your MP3 bitrate, download. The conversion runs entirely in your browser - nothing uploads, nothing is stored, and large files convert as fast as your machine allows.

Drop a AAC file here, or click to choose

Converted locally in your browser - nothing is uploaded

MP3 quality

Why convert AAC to MP3?

Raw AAC streams and .aac files confuse many players even though the codec itself is excellent. Repackaged as MP3 they play everywhere. All conversion happens in your browser with the Web Audio API and a pure-JavaScript MP3 encoder - files never upload, there are no size limits beyond your device, and the page works offline once loaded. Need to shorten the file first? The audio trimmer cuts before you convert; the volume normalizer levels the loudness; and the converter hub handles every other direction.

FAQ

Is the conversion really done in my browser?

Yes - the file is decoded with the Web Audio API and re-encoded to MP3 by a JavaScript port of the LAME encoder, all on your device. Nothing uploads, which is why there is no queue, no file-size cap, and no privacy question.

What MP3 quality should I choose?

192 kbps is the sweet spot for most uses - transparent to most listeners at half the size of 320. Choose 320 kbps for archiving or critical listening, 128 kbps for voice recordings and minimum size.

Does converting reduce audio quality?

Converting to MP3 is lossy: it discards data the encoder judges inaudible. At 192-320 kbps the difference from the source is inaudible to most people on most material. Converting lossy-to-lossy (e.g. OGG to MP3) stacks two generations of loss - fine for convenience, avoid for masters.

Try Our Other Audio Tools

Online Tone Generator

Generate single tones with precise frequency control. Perfect for quick audio testing and tuning.

Multiple Tone Generator

Play multiple frequencies simultaneously with independent volume and panning controls.

Frequency Sweep Generator

Create linear or exponential frequency sweeps for speaker testing and room acoustics analysis.

Binaural Beats Generator

Generate binaural beats for meditation, focus, and relaxation. Requires headphones for proper effect.

DTMF Tone Generator

Generate telephone dial pad tones (Dual Tone Multi Frequency). Interactive touch-tone dial pad.

Online Metronome

Professional metronome with tap tempo, time signatures, subdivisions, and tempo trainer for musicians.

BPM Counter

Tap along to any song to find its tempo in beats per minute. Includes tempo markings reference.

Chord Player

Hear major, minor, diminished, and seventh chords in every key. Block chords or arpeggios.

Chord Progression Player

Hear classic progressions like I-V-vi-IV and 12-bar blues in any key at any tempo.

Online Piano

Free browser piano with 3 octaves, note names, and computer keyboard support.

Noise Generator

Generate white, pink, and brown noise for sleep, focus, tinnitus relief, and speaker burn-in.

Instrument Tuner

Reference tuning notes for guitar, bass, ukulele, violin, cello, and more at concert pitch (A440).

Subwoofer Test

Test your subwoofer with a 60-second frequency sweep (150Hz-1Hz) and individual bass test tones.

Hearing Test

Test your hearing range from 8kHz to 20kHz. Find your hearing age and compare with averages.

Solfeggio Frequencies

Ancient healing tones including 528Hz (DNA repair). For meditation, chakra activation, and spiritual healing.

Speaker Balance Test

Test stereo balance with panning control and left/right channel testing. Perfect for speaker setup.

Speaker Phase Test

Check speaker wiring polarity by comparing in-phase and out-of-phase test signals.

Audio Latency Test

Measure your Bluetooth or system audio delay in milliseconds with a click-and-flash sync test.

Spectrum Analyzer

Real-time frequency analysis of your microphone input with a live log-frequency display.

Decibel Meter

Measure approximate sound levels with your microphone - live dB with min/avg/max tracking.

Mic Test

Check your microphone in seconds: live waveform, level meter, and record-and-playback check.

Interval Ear Trainer

Learn to recognize musical intervals by ear with quiz mode, score tracking, and song mnemonics.

Pitch Pipe

Chromatic pitch pipe with all 12 notes across 3 octaves. Perfect for singers, choirs, and a cappella groups.

Shepard Tone

Experience the auditory illusion of an infinitely ascending or descending tone. Mind-bending psychoacoustic phenomenon.

Mosquito Tone

Can you hear the mosquito tone? High-frequency test (15-20kHz) that only young people can hear. Find your hearing age!

Soundscape Builder

Create relaxing ambient soundscapes with singing bowls, nature sounds, and binaural beats.

Fix My Speaker

Three sound modes to clean a muffled speaker: 165 Hz water eject, dust-shaking sweeps, and vibration.

Water Eject Sound

Push water out of a wet phone or watch speaker with a pulsed 165 Hz tone - the same method Apple Watch uses.

Dog Whistle

Adjustable high-frequency whistle (8-22 kHz) for dog training - clearly audible to dogs, silent to most adults.

Isochronic Tones

Rhythmic pulsed tones across delta to gamma ranges. Stronger than binaural beats and works without headphones.

Perfect Pitch Test

Name 12 random notes with no reference tone and find out if you have absolute pitch or great pitch memory.

Vocal Range Test

Sing your lowest and highest notes and get your range plus voice type - bass to soprano. Mic-based, nothing uploaded.

Hearing Age Test

Find the highest frequency you can hear (8-20 kHz) and see how old your ears test. Takes one minute.

Vocal Remover

Instant karaoke via center-channel cancellation - free, unlimited, and processed locally.

Voice Recorder

Record from your microphone and download as WAV - no signup, nothing uploaded.

Volume Normalizer

Normalize any file to a LUFS target with true-peak protection instead of silent clipping.

Drum Machine

16-step beat maker with synthesized 808-style drums, swing, and shareable pattern links.

Audio Analyzer / LUFS Meter

Drop a file and get integrated LUFS, true peak, RMS, and a waveform - measured locally, nothing uploaded.

Chromatic Tuner

Microphone tuner with a cents needle - play any note on any instrument and tune to ±5 cents.

Headphone Test

Five-minute headphone checkup: channels, wiring polarity, bass and treble reach, and driver distortion.

Surround Sound Test

Send noise to each 5.1 channel - fronts, center, surrounds, and subwoofer - and catch swapped or dead speakers.