Audio Converter
Change audio formats or take the sound from a video. Free, private, and on your device.
Convert from
Drop your audio or video files here
One file or a whole batch. Everything stays on your device.
Works with MP3, WAV, M4A, AAC, OGG, OPUS, FLAC, WEBM, MP4, MOV and MKV. Other supported files are welcome too.
Convert Audio — Without Uploading Anything
Change audio formats, extract sound from video, or prepare a recording for your next app. Add one file or a batch, choose the output, and convert in your browser. Your files stay on your device throughout the process.
Many converters ask you to send a recording to their server before they can do any work. Crikk reads your local file and runs the audio engine on your device. You skip the upload, and the sound stays with you. You can make another copy with different settings whenever you need one.
How to Convert Audio Files
- Step 1
Add your audio files
Drop your files on the page or use Choose Files. You can add several recordings at once. A conversion page accepts other supported formats too; each row shows what was actually detected.
- Step 2
Check the output format
MP3 starts selected. Choose another format if your plans change, then open Advanced for bitrate, sample rate or channel settings. Leave the defaults to preserve source settings where possible.
- Step 3
Convert and download
Click Convert. Files finish one at a time so several encoders do not compete for memory. A single result downloads automatically. For a batch, download individual files or save the completed results together as a ZIP.
Will Converting Audio Affect Quality?
Quality depends on the source, target format and settings. Compatible audio can be copied into a new container without re-encoding. Other conversions decode and encode the sound. Lossless output cannot restore detail that was removed from an earlier compressed recording.
Will My File Get Bigger or Smaller?
Compressed outputs such as MP3, AAC and Opus are useful for small delivery files. WAV usually uses more space. FLAC offers lossless compression when an encoder is available in your browser. The finished row shows your source and download sizes.
When to Use MP3
- sharing music. Share a small file that most people can open.
- phones and car stereos. Play your audio on devices with older software.
- podcasts. Keep spoken episodes easy to download.
- music libraries. Fit more tracks in your collection.
- sending by email or chat. Send a smaller attachment to a friend.
Before choosing MP3, check what the receiving app or player accepts. Plays on almost everything. Any media player — Windows Media Player, Apple Music, VLC, and every phone are common ways to open this format. Keep the original recording until you have played the result and confirmed that it fits your project.
Why Use Crikk to Convert Audio
🔒 Private by design
Local file reading and conversion keep your recording on your device. The tool does not upload sound or file names.
⚡ No upload wait
Conversion starts with a local file. Speed depends on its length, the output codec and your device.
📦 Convert a batch
Add several files and work through them one at a time. Download completed files separately or together in a ZIP.
🎚️ Choose your settings
Keep source settings where possible, or choose a bitrate, sample rate and channel count for your next app.
↔ Change your mind
The output dropdown stays editable after you add files. Pick a different format without leaving the current page.
✓ Free and simple
There is no account to create and no watermark added to your sound. Your original files stay available for later.
About MP3 Files
MP3 is the most popular audio format in the world. It shrinks audio to a small size while still sounding good. Almost every phone, computer, car stereo, and app can play it.
Opens with: Any media player — Windows Media Player, Apple Music, VLC, and every phone
Made by Fraunhofer Society / MPEG · Since 1993
Frequently Asked Questions
Is this audio converter free?
Yes. It is free to use with no sign-up, watermark or daily conversion limit.
Do you upload my audio file?
No. The file is read and processed by your browser on your device. The conversion tool does not send audio or file names to a server.
Does it work without internet?
The tool can cache the current page and its audio engine when service workers are available. Offline availability depends on your browser cache. Open the page online first; browser storage cleanup can remove cached files.
Can I convert several audio files?
Yes. Add a batch and convert it one file at a time. Each result has a download button. Multiple finished files can also be saved together in a ZIP.
Is there a file size limit?
There is no server upload limit because your files stay local. Very large files still depend on device memory, and output files are held in your browser. A computer is a better choice for long recordings.
Does it work on phones?
A browser with the required audio features can run the tool. Codec support varies by device. Unavailable output formats are disabled, and an error row explains when the selected file cannot be decoded.
Can I choose something other than MP3?
Yes. The page starts with MP3, but the output dropdown stays editable. Changing it updates this session without navigating to another page.