PixNudge
English

Free online audio converter

Convert MP3, WAV, FLAC, M4A, OGG, AAC, OPUS and more, or pull the audio out of a video. Batch conversion with adjustable quality — and nothing is uploaded.

Convert to

Plays on every phone, computer, car stereo and music app. 192 kbps sounds great for most music.

Drop audio or video files here

or paste them, or click to choose — several files at once

Choose files

MP3, WAV, FLAC, OGG, M4A, AAC, OPUS, AIFF, WMA, APE, AMR, MP4 and more · up to 300 MB per file

The converter (about 30 MB) is downloaded once on first use and then cached. Your files never leave your device.

How it works

  1. 1

    Pick the output format

    Choose MP3, WAV, FLAC, OGG, M4A, M4R, AAC or OPUS, and adjust the bitrate, sample rate or channels if you like.

  2. 2

    Add your files

    Drop audio or video files onto the page, paste them, or click to choose. Conversion starts right away.

  3. 3

    Download

    Save each converted file, or download them all together as a ZIP archive.

Popular conversions

All audio conversions

Convert to MP3

Convert to WAV

Convert to FLAC

Convert to OGG

Convert to M4A

Convert to M4R

Convert to AAC

Convert to OPUS

Audio formats at a glance

MP3

Lossy

MPEG-1 Audio Layer III

The universal audio format

MP3 is the most widely supported compressed audio format. It removes sounds the ear barely notices, shrinking music to about a tenth of its CD size.

Strengths
Plays on virtually every device, app and car stereo. Small files with good quality at 192–320 kbps.
Limitations
Lossy: some detail is lost with every encode. Less efficient than AAC or Opus at low bitrates.

WAV

Lossless

Waveform Audio File Format

Uncompressed studio audio

WAV stores raw PCM audio exactly as it was recorded, without compression. It is the standard working format of audio editors, music production software and broadcasting.

Strengths
Perfect quality, instant to decode, and accepted by all editing software.
Limitations
Very large files (about 10 MB per minute at CD quality) and limited support for tags.

FLAC

Lossless

Free Lossless Audio Codec

Lossless compression for music lovers

FLAC compresses audio without discarding anything: once decoded, it is bit-for-bit identical to the original, yet takes roughly half the space of WAV.

Strengths
No quality loss, 40–60% smaller than WAV, rich tags and cover art, open and royalty-free.
Limitations
Still much larger than MP3, and not supported by some older devices or by iTunes.

OGG

Lossy

Ogg Vorbis

The open alternative to MP3

OGG files usually contain Vorbis audio, a free and patent-free lossy codec. It is common in video games, on Android and in open-source software.

Strengths
Better quality than MP3 at the same bitrate, and completely royalty-free.
Limitations
Not supported by the iPhone Music app and by many car stereos.

M4A

Lossy

MPEG-4 Audio

Apple's everyday music format

M4A is an MPEG-4 audio file, usually containing AAC. It is the standard format of Apple Music, iTunes and the iPhone Voice Memos app.

Strengths
Better quality than MP3 at the same size, with full support on Apple devices, Android and modern browsers.
Limitations
Some older players and car stereos only understand MP3.

M4R

Lossy

iPhone Ringtone

The iPhone ringtone format

M4R is an M4A (AAC) file with a different extension, which iPhones recognize as a ringtone or alert tone. iOS accepts ringtones of up to 40 seconds.

Strengths
The native ringtone format of the iPhone: small files with good quality.
Limitations
Only useful as a ringtone, and anything longer than 40 seconds is rejected by iOS.

AAC

Lossy

Advanced Audio Coding

Efficient successor to MP3

AAC (Advanced Audio Coding) was designed to replace MP3 and is used by YouTube, Apple and digital radio. An .aac file is a raw AAC stream without an MP4 container.

Strengths
Better sound than MP3 at the same bitrate, and broadly supported.
Limitations
Raw .aac files cannot hold cover art and seek less precisely than M4A.

OPUS

Lossy

Opus Interactive Audio Codec

The most efficient modern codec

Opus is an open, royalty-free codec designed for the internet. It powers WhatsApp voice messages, Discord, video calls in the browser and YouTube streaming.

Strengths
The best quality at low bitrates, great for both speech and music.
Limitations
Not supported by older devices, iTunes or many car stereos.

AIFF

Lossless

Audio Interchange File Format

Apple's uncompressed audio format

AIFF is Apple's counterpart to WAV: uncompressed PCM audio used by Logic Pro, GarageBand and professional audio work on the Mac.

Strengths
Perfect quality, supports tags, and is standard in Mac music software.
Limitations
Files are as large as WAV, and the format is less common on Windows and Android.

WMA

Lossy

Windows Media Audio

Microsoft's legacy audio format

WMA (Windows Media Audio) comes from the Windows Media Player era. Many older music libraries and Windows recordings still use it.

Strengths
Small files with decent quality.
Limitations
Poor support on iPhone, Mac, Android and in modern apps — converting to MP3 or M4A fixes that.

APE

Lossless

Monkey's Audio

Monkey's Audio lossless format

APE (Monkey's Audio) is a lossless format that compresses slightly better than FLAC. It is popular for CD rips in some music communities.

Strengths
Lossless, with excellent compression.
Limitations
Slow to decode, and barely supported by phones, car stereos and most players.

AMR

Lossy

Adaptive Multi-Rate

Voice recording format

AMR (Adaptive Multi-Rate) is a speech codec designed for mobile phone calls. Many phones and voice recorders save calls and voice notes as AMR.

Strengths
Tiny files for speech.
Limitations
Phone-call sound quality that is unsuitable for music, and poor support on computers.

MP4

Video

MPEG-4 Part 14

Video with a soundtrack

MP4 is the most common video format, and its soundtrack is usually AAC. Converting it to an audio format keeps only the sound and drops the picture.

Strengths
Lets you keep the music, speech, lecture or podcast from a video.
Limitations
The picture is discarded: the result contains audio only.

Why PixNudge

Nothing is uploaded

Audio is converted by ffmpeg running inside your browser. Your files never reach a server.

Batch conversion

Queue up to 50 files and download them one by one or together as a ZIP.

Full control over quality

Set the bitrate, bit depth, sample rate and channels — or simply keep the sensible defaults.

Frequently asked questions

Which formats can I convert?

You can open MP3, WAV, FLAC, OGG, M4A, M4R, AAC, OPUS, AIFF, WMA, APE and AMR files, as well as the soundtrack of videos such as MP4, MOV, MKV, WEBM and AVI. You can save as MP3, WAV, FLAC, OGG, M4A, M4R (iPhone ringtone), AAC or OPUS.

Are my audio files uploaded to a server?

No. The converter is ffmpeg compiled to WebAssembly and runs entirely in your browser. Your files never leave your device, so private recordings stay private.

Is there a file size limit?

Yes: 300 MB per file on computers and 100 MB on phones and tablets. Because everything happens in your browser, the converted file has to fit in the memory of the tab.

Can I convert several files at once?

Yes. Add up to 50 files; they are converted one after another. Download each file separately or all of them together as a ZIP.

Which output format should I choose?

MP3 if you want it to play everywhere. M4A or AAC for Apple devices and better quality per megabyte. FLAC to keep perfect quality in less space, WAV for editing software, OPUS for the smallest files, and M4R for iPhone ringtones.

Can I convert NCM, KGM, QMC or other music app downloads?

No. Those files are encrypted by the streaming service so that they only play inside its app, and PixNudge does not remove that protection. Use the app's own export option or buy a DRM-free copy of the track.

Does it work on my phone?

Yes, in current versions of Safari, Chrome, Edge and Firefox on iPhone, Android and desktop. Phones convert more slowly than computers, especially long files.