Audio Converter
Change any recording, song or voice memo into the format your player, editor or upload form wants. Choose a lossy format such as MP3 for small files that play everywhere, or a lossless one such as WAV or FLAC when the audio is going into an editor or an archive.
Audio Converter
or drop MP3, WAV, M4A … files here ·
Max 95 MB per file· Up to 20 files· Deleted after 30 minutes
Files are processed on our servers and deleted after 30 minutes.
Constant bitrate (CBR) gives a predictable size and works on every player. Variable bitrate (VBR) spends bits where the music needs them and is usually smaller at the same quality.
Keep the source rate unless a device asks for one. 44.1 kHz is CD standard, 48 kHz is video standard, 8 kHz is used by phone systems and AMR.
Mono halves the size of lossless files and is fine for voice recordings.
16-bit is CD quality. 24-bit keeps headroom for editing and mastering; converting a 16-bit source up does not add detail.
Optional. Seconds (e.g. 75) or minutes:seconds (1:15). Leave empty to start at the beginning.
Optional. Same format as the start time. Leave empty to keep everything up to the end.
How to use this tool
- 1
Add the audio files
Drop up to 20 files, each up to 95 MB: MP3, WAV, M4A, AAC, FLAC, OGG, Opus, AIFF, WMA, AMR, M4B, CAF, WebM audio, MIDI and more.
- 2
Choose format and bitrate
Pick the target under Convert to. Lossy formats show a Bitrate, 192 kbps by default. Sample rate, Channels, trimming and volume are under Advanced settings.
- 3
Convert and download
Press Convert to MP3 (the label follows your format) and download each file or the whole batch as a ZIP.
How do I convert an audio file to another format?
Upload the file, pick the format under Convert to and press the convert button. MP3 at 192 kbps is the default and sounds the same as the source for most listeners. Batches of 20 files work in one go.
Audio formats you can convert to
Lossy
- MP3, 64–320 kbps: music, podcasts, car stereos, upload forms
- M4A / AAC: Apple devices, iTunes, YouTube and streaming audio
- Opus / OGG: web apps, games, voice chat; Opus is efficient at low bitrates
- WMA: older Windows Media players
Uncompressed and lossless
- WAV / AIFF: uncompressed, for editing, DAWs, CD audio and broadcast delivery
- FLAC / ALAC: lossless compressed, for archiving music at full quality in less space
Special purpose
- AMR: lossy speech codec for basic phones and telephony
- M4R: AAC audio for iPhone ringtones under 40 seconds
- MIDI: notes, not sound, for notation software or a synthesizer
The main choice is between lossy and lossless. Lossy codecs such as MP3, AAC and Opus remove sounds that human hearing is unlikely to notice, which is how a song shrinks from about 10 MB per minute as CD-quality WAV (44.1 kHz, 16-bit stereo, 1,411 kbps) to under 1.5 MB per minute as 192 kbps MP3. Lossless formats keep every sample: WAV and AIFF store them raw, while FLAC and ALAC compress them without loss, usually to around half to two-thirds of the WAV size.
MP3, standardized as part of MPEG-1 in 1993, is still the safest target because nothing refuses it, and its patents expired in 2017. Opus, published by the IETF as RFC 6716 in 2012, sounds better than MP3 at low bitrates and is the codec behind most browser voice and video calls. The most common real-world routes, such as M4A to MP3 for iPhone voice memos, WAV to MP3 for recordings that are too big to send and FLAC to MP3 for car stereos, have their own pages below.
One rule saves a lot of disappointment: converting never adds quality. Going from a lossy file to a lossless one only makes it larger, and going from one lossy format to another loses a little more each time. Keep the best original you have and convert copies from it.
Choosing a bitrate for MP3, M4A and other lossy formats
- 64 kbps
Voice memos and spoken word in mono
- 128 kbps
Speech, audiobooks, podcasts
- 192 kbps
Default; music that sounds like the source
- 320 kbps
The MP3 maximum, for critical listening
Sample rate, channels, trimming and tags
- Bitrate mode
- Bitrate mode chooses constant (CBR) or variable (VBR) for MP3, M4A, AAC, OGG and Opus. VBR is usually smaller at the same quality.
- Sample rate
- Sample rate keeps the source rate by default. 44.1 kHz is the CD standard, 48 kHz the video standard, 16 and 8 kHz are for speech and phone systems; 96 kHz is available for studio work.
- Channels and bit depth
- Channels keeps the source, or forces stereo or mono; mono halves lossless files and suits voice. Bit depth for WAV, FLAC, AIFF and ALAC is 16-bit (CD), 24-bit or 32-bit float.
- Start and end
- Start at and End at accept seconds (75) or minutes:seconds (1:15) to keep only part of the file while converting.
- Normalise volume
- Normalise volume brings loudness to −16 LUFS so files in one playlist play at a similar level.
- Tags and cover art
- Keep tags and cover art copies title, artist, album and the embedded cover where the new format supports them.
Audio conversion myths and what actually happens
MythConverting to another format always makes the file smaller.
FactA lossless target, or a higher bitrate than the source, makes it bigger. Pick MP3 or M4A at the source's bitrate or lower; for an exact size use compress audio.
MythAny converter can turn an Apple Music or Spotify download into MP3.
FactStreaming downloads are protected with DRM and cannot be read by any converter. Only DRM-free files, such as your own recordings or purchases sold without protection, convert.
MythA lower Sample rate only saves space.
Fact22.05, 16 and 8 kHz cut high frequencies, so music sounds dull or muffled. Those rates are meant for speech; keep Same as source or 44.1 kHz for music.
MythAny M4R file shows up as an iPhone ringtone.
FactIt has to be shorter than 40 seconds and imported through Finder or iTunes. Shorten it with End at and import it again.
Audio converter questions
What is the best audio format to convert to?
For listening and sharing, MP3: every phone, car, browser and upload form plays it. For editing or keeping a master copy, WAV or FLAC, which keep every sample. For the smallest file at a given quality, Opus or M4A. When a device or service names a format, use that one.
Does converting MP3 to WAV or FLAC improve quality?
No. A lossless container stores exactly what it receives, so an MP3 converted to WAV sounds like the MP3 and only takes more space. Convert to WAV when an editor or a sampler needs uncompressed audio, not to restore detail that lossy compression already removed.
Is variable bitrate better than constant bitrate?
VBR spends more bits on complex passages and fewer on quiet ones, so it usually gives a smaller file at the same quality. CBR gives a predictable size and the widest compatibility with old players and some broadcast systems. Bitrate mode is CBR by default for that reason.
How do I make an iPhone ringtone from a song?
Choose M4R under Convert to, then set Start at and End at under Advanced settings to a section under 40 seconds. Import the .m4r through Finder or iTunes on a computer, or use the MP3 to M4R page, which is set up for ringtones.
What does converting audio to MIDI do?
MIDI does not store sound; it stores notes, timing and velocity. Choosing MIDI transcribes the melody of a recording into notes you can open in a notation program or a DAW. It works best on a single clear instrument or voice; full mixes give messy results. See audio to MIDI converter for tips.
Will my song titles and album art survive the conversion?
Yes while Keep tags and cover art is on, which is the default. Title, artist, album and the embedded cover are copied wherever the target format supports them. WAV has only basic tag support, so some players will not show cover art for WAV files.
Why do my converted songs play at different volumes?
They were mastered at different loudness. Turn on Normalise volume to bring each file to −16 LUFS, the loudness level Apple recommends for podcasts, so tracks in a playlist sit at a similar level.
All Audio Converter tools
Pick the exact target you were asked for. Every page below is the same tool with different defaults.
- AAC to MP3 ConverterConvert raw .aac files from call recorders, voice apps, dashcams and stream captures to MP3 with correct length and seeking. Free, 20 files at once.
- AIF to WAV ConverterConvert AIF and AIFF files from Logic, GarageBand or a Mac CD rip to WAV without losing a sample. Keeps 24-bit depth and the original sample rate.
- AIFF to MP3 ConverterTurn AIFF and AIF files from GarageBand, Logic or iTunes rips into MP3 small enough to email or upload. Tags and cover art kept, up to 20 files at once.
- AMR to MP3 ConverterConvert .amr and .3ga call recordings and voice memos from Android and older phones to MP3 that any computer plays. Mono 64 kbps, 20 files at once.
- Audio to MIDI ConverterTranscribe a sung, hummed or played melody from MP3, WAV, M4A, FLAC or OGG into a MIDI file for your DAW or notation app. Up to 20 files, no account.
- CAF to MP3 ConverterConvert .caf files from Messages, GarageBand, Logic or an iOS app into MP3 that plays on Windows, Android and in the car. Any codec inside, 20 files at once.
- FLAC to ALAC ConverterConvert FLAC albums to Apple Lossless (ALAC) so the Music app on Mac, iPhone and iPad will import them. Lossless, 16 or 24-bit, 20 files per batch.
- FLAC to MP3 ConverterTurn FLAC albums into 320 kbps MP3 copies for phones, car stereos and Apple Music, with tags and cover art carried over. Up to 20 tracks per batch.
- FLAC to WAV ConverterUnpack FLAC into plain WAV for DAWs, CD burning and DJ players that skip FLAC. Same samples, 16- or 24-bit, up to 20 files, no account needed.
- M4A to FLAC ConverterConvert M4A to FLAC: Apple Lossless (ALAC) files become bit-identical FLAC with tags and artwork. Choose 16- or 24-bit, up to 20 files at once.
- M4A to M4R ConverterConvert M4A to M4R for an iPhone ringtone: trims to 30 seconds by default, re-encodes Apple Lossless to AAC and keeps your iTunes song or voice memo.
- M4A to MP3 ConverterConvert M4A files from iPhone Voice Memos or iTunes to MP3 that plays in any car, app or upload form. Free, no sign-up, 20 files per batch.
- M4A to OGG ConverterTurn iPhone voice memos and AAC music into Ogg Vorbis for Wikimedia Commons, Godot and Minecraft resource packs. Up to 20 files, no account needed.
- M4A to WAV ConverterConvert M4A to uncompressed WAV for Audacity, Pro Tools, video editors and phone systems. Pick 16, 24 or 32-bit and the sample rate. Free, online.
- M4B to MP3 ConverterConvert DRM-free M4B audiobooks to MP3 for car stereos, MP3 players and Android apps. Speech-tuned 64 kbps mono, cover art kept, no account needed.
- MIDI to MP3 ConverterRender MIDI files (.mid, .midi) into MP3 audio you can play on a phone, send in a chat or add to a video. General MIDI instruments, 20 files per batch.
- MKA to MP3 ConverterConvert MKA (Matroska audio) to MP3. AC-3, DTS, FLAC, Opus or AAC inside is decoded and surround is downmixed to stereo. Up to 20 files, 95 MB each.
- MP3 to AAC ConverterConvert MP3 to AAC (.aac) for car stereos, playout tools and upload forms that ask for AAC. Pick 64 to 320 kbps, CBR or VBR, up to 20 files at a time.
- MP3 to AIFF ConverterConvert MP3 to AIFF for hardware samplers, Logic Pro, GarageBand and DJ libraries. Uncompressed 16- or 24-bit PCM with ID3 tags and artwork kept.
- MP3 to AMR ConverterConvert MP3 to AMR for feature phones, MMS and telephony tests. Mono 8 kHz speech audio at about 90 KB per minute, with trim and volume leveling.
- MP3 to FLAC ConverterWrap MP3 audio in FLAC for libraries, editors and players that want one lossless format. Tags and covers kept, 16-bit, up to 20 files, no account.
- MP3 to M4A ConverterConvert MP3 songs, lectures and recordings to M4A (AAC) for Apple apps, upload forms and smaller files. Pick the bitrate, keep tags and cover art.
- MP3 to M4R ConverterCut the part of an MP3 you want and save it as an M4R iPhone ringtone, ready to drag onto your phone in Finder or iTunes. Up to 20 files, no account.
- MP3 to MID ConverterConvert MP3 to a .mid file: the melody is transcribed into notes you can open in MuseScore, GarageBand, Synthesia or any DAW. Best on a single instrument.
- Convert MP3 to MIDIConvert MP3 to MIDI online: transcribe the lead melody of a song or a solo recording into editable notes for a DAW, MuseScore or piano practice.
- MP3 to OGG ConverterConvert MP3 music and sound effects to Ogg Vorbis for Godot, Unity, RPG Maker, Minecraft resource packs and HTML5 games. Batch of 20, free, online.
- MP3 to Opus ConverterRe-encode MP3 as Opus for web pages, chat bots and spoken-word archives. At 96 kbps a minute takes about 0.7 MB. Up to 20 files at once, no account.
- MP3 to WAV ConverterDecode MP3 to uncompressed 16-bit WAV for audio CDs, samplers, DAWs and broadcast tools. Choose 44.1 or 48 kHz, up to 20 files, no account needed.
- MP3 to WMA ConverterConvert MP3 to WMA for legacy Windows software, older car stereos and players that list WMA. Pick 64 to 320 kbps and keep titles and cover art.
- OGG to MP3 ConverterConvert OGG Vorbis or Opus audio, Telegram voice notes and game sound files to MP3 that plays on iPhones, car stereos and every editor. Free, no sign-up.
- OGG to WAV ConverterOGG to WAV converter for game sounds, Vorbis music and open-licensed recordings: decode to 16 or 24-bit PCM for editors, samplers and video apps.
- Opus to MP3 ConverterConvert .opus voice notes, call recordings and web audio to MP3 that plays in car stereos, older phones and editors. Up to 20 files, no account needed.
- Opus to WAV ConverterDecode .opus voice notes, call recordings and browser audio to WAV for editors, transcription and archiving. 48 kHz by default, 20 files per batch.
- WAV to FLAC ConverterShrink WAV recordings and CD rips into FLAC without changing a single sample. Tags and cover art supported, 24-bit kept, up to 20 files, no account.
- WAV to M4A ConverterShrink WAV bounces, field recordings and lectures to M4A (AAC) at 256 kbps, about a fifth of the size, for iPhone, the Music app and podcast hosts.
- WAV to MIDI ConverterTranscribe a sung, hummed or played melody in a WAV file into an editable MIDI file for your DAW or notation app. Up to 20 files at once, free.
- WAV to MP3 ConverterConvert WAV recordings and bounces to MP3 at 320, 192 or 128 kbps. Cut file size by up to 90% for email, uploads and phones. Free, no account.
- WAV to OGG ConverterEncode WAV masters to Ogg Vorbis for game engines, web audio and mods. About an eighth of the size at 160 kbps VBR, with tags carried over.
- WAV to WAV ConverterResample WAV files to 44.1, 48, 16 or 8 kHz, turn 24-bit or float into 16-bit, or stereo into mono, for CDs, samplers, phone systems and speech tools.
- WEBA to MP3 ConverterConvert .weba audio from browser recorders and web pages to MP3 with a proper duration and seek bar. Opus or Vorbis inside, up to 20 files, no account.
- WMA to MP3 ConverterConvert WMA rips from Windows Media Player, including WMA Pro and Lossless, to MP3 that plays on iPhone, Mac, Android and car stereos. No account needed.