The Ultimate Free Audio Editor Online
Whether you are a podcaster needing to trim out silence, a musician converting stems, or just someone trying to create a ringtone, finding a reliable audio editor online can be frustrating. Most tools are riddled with intrusive popups, restrict your file sizes, or force you to create an account before downloading your edited file.
That's why we built the 12NOTEZ Audio Editor. It is a completely free, professional-grade audio workstation built directly into your web browser. Utilizing modern WebAssembly, it brings the power of desktop software (like Audacity or FFmpeg) straight to your Chrome or Safari browser, with zero installation required.
How to Edit Audio in Your Browser (Step-by-Step)
- Upload Your File: Simply drag and drop your audio file (MP3, WAV, M4A) or video file (MP4, MKV) into the drop zone above. You can also upload multiple files for batch processing.
- Trim and Cut: A beautiful interactive waveform will appear. Drag the yellow handles to select the exact start and end points of your audio. You can hit the "Play Selection" button to preview your exact cut.
- Apply Fades: If you want your audio to sound professional, add a smooth Fade In or Fade Out using the advanced options panel. The visualizer will show the fade gradient directly on the waveform!
- Choose Format: Need a lightweight file for the web? Select MP3. Need lossless quality for music production? Select WAV. Our audio editor supports over a dozen formats.
- Export: Click "Batch Export" (to export files individually) or "Merge Files" (to combine all uploaded tracks into one long audio file). The processing happens instantly, and your file will download automatically.
Advanced Features for Professionals
This isn't just a simple audio cutter. For producers and audio engineers, we've exposed advanced FFmpeg parameters:
- Custom Codecs & Bitrates: Force specific encoders (like
libmp3lame) and set constant bitrates (e.g., 320kbps) for maximum fidelity. - Sample Rate Conversion: Need to upsample or downsample? Easily convert 44.1kHz audio to 48kHz for video sync.
- Audio Merging: Combine multiple podcast segments or vocal takes into a single seamless track.
Frequently Asked Questions
Is my audio uploaded to your servers?
No. The 12NOTEZ Audio Editor uses advanced WebAssembly technology. Your files are processed entirely locally inside your own web browser. We never upload, store, or have access to your audio files.
Is this audio editor completely free?
Yes, it is 100% free with no hidden fees, no subscriptions, and absolutely no watermarks on your exported audio.
Can I merge multiple audio files into one?
Yes! Upload multiple files, arrange them in order, and click the "Merge Files" button. The editor will concatenate them into a single audio track in your chosen format.
Can I extract audio from a video file like MP4?
Absolutely. Just upload your video file (MP4, MKV, MOV, etc.) and our engine will extract the audio track, allowing you to edit and save it as an MP3 or WAV effortlessly.