Audio tools that run in your browser.
Convert, cut, compress and clean up audio. Your files never leave your device: no upload, no account, no size limit.
Popular
- Audio ConverterConvert between audio formats, batch and ZIP
- WAV to MP3Shrink a big WAV recording into a small MP3
- M4A to MP3Turn iPhone voice memos and iTunes purchases into MP3
- MP4 to MP3Rip the sound from MP4 videos, lectures and screen captures
- Compress AudioReduce audio file size with a quality or bitrate setting
- Trim AudioKeep a section of an audio file, with a waveform
- MP3 CutterFast MP3 cut that keeps the original quality
- Merge Audio FilesJoin several audio files into one, with crossfades
All tools
How it works
- 01Choose a filePick a file or drop it on a tool. It is opened on your device, not uploaded.
- 02Adjust and previewSet the options, listen to the result, and cancel any time.
- 03DownloadSave the result. Large jobs can stream straight to disk in browsers that allow it.
Supported formats
Details and browser support| Format | Type | Best for |
|---|---|---|
| MP3.mp3 | Lossy | music libraries, podcasts and sharing when you cannot know what the listener uses |
| WAV.wav .wave | Uncompressed | editing, mastering, sampling and handing audio between programs without quality loss |
| M4A.m4a .mp4 .m4r | Lossy | iPhone and Apple Music libraries, ringtones (.m4r), and better quality than MP3 at the same size |
| AAC.aac | Lossy | streaming-style files and hardware that expects a plain AAC stream |
| FLAC.flac | Lossless | archiving a CD collection and keeping masters at about half the size of WAV |
| OGG.ogg .oga | Lossy | games, open-source projects and royalty-free distribution |
| Opus.opus .ogg | Lossy | voice notes, podcasts, streaming and small files with high quality at low bitrates |
| WebM.webm .weba | Lossy | recordings made in the browser and audio taken from web video |
| AIFF.aiff .aif .aifc | Uncompressed | Mac-centred production and handing files to studios that ask for AIFF |
| AMR.amr .3gp | Lossy | speech on very small files, and reading old phone recordings |
| WMA.wma | Lossy | opening an old music collection; not recommended for new files |
Questions
Is AudioTools free?
Yes. There are no accounts, no ads, no watermarks and no daily limits. The only limit is what your own device can handle.
Are my files uploaded anywhere?
No. Every tool runs inside your browser, on your device. The site only serves its own pages, code and fonts; your audio and video are never sent to a server.
Is there a maximum file size?
There is no fixed limit. Most tools read the file in pieces, so long recordings work. Some operations (such as reversing or AI vocal separation) need more memory, and the tool warns you before you start if a file looks too big for your device.
Which formats are supported?
MP3, WAV, M4A and AAC, FLAC, OGG Vorbis, Opus, WebM, AIFF, AMR and WMA, plus the audio track of MP4, MOV and MKV videos. The table above lists what each format is good for; the Formats page has the details.
Does it work offline?
Processing never needs the network, but pages and codecs are loaded from this site the first time you use them. A page you have already opened can work without a connection if your browser kept it; a page you have not visited cannot.
Does it work on a phone or tablet?
Yes, in current mobile browsers, and the layout is built for touch. Phones have less memory than computers, so very large files and AI vocal separation can be slow or fail on older devices.
Why can some formats not be exported in my browser?
Browsers differ in which audio encoders they include. Where one is missing, AudioTools loads its own encoder for MP3, FLAC, AAC, Vorbis, WMA and AMR. If a combination is truly not possible, the tool says so before you start instead of failing at the end.
How is audio quality preserved?
Cutting, splitting and tag editing copy the audio without re-encoding whenever the format stays the same, so nothing changes. Converting to a lossy format re-encodes once, and WAV and FLAC outputs are lossless.
Do you keep a copy of my files?
No. Files stay in your browser while you work and are released when you leave or reset the page. A few tools keep small things locally, such as your settings or the downloaded AI model, and the privacy page shows how to clear them.
Which browsers are supported?
Current versions of Chrome, Edge, Firefox and Safari. Firefox on Android and older Safari versions lack some built-in audio support, so conversions there use bundled decoders and can be slower.