Audio tools and studio

Trim and refine recordings, inspect audio properties and export WAV or MP3. Use Audio Studio for several edits in one session.

Files never leave your device — every edit runs entirely in your browser.

How it works

  1. 1. Open an audio file

    Up to 100 MB — its waveform is drawn instantly.

  2. 2. Pick a tool and edit

    Trim/cut ranges, fade in or out, adjust volume, change speed, remove silence or convert mono/stereo — each edit can be undone.

  3. 3. Export as WAV or MP3

    Download the edited result once you are happy with it.

Choose a task

Edit a recording

Inspect audio and estimate size

Choose channels and export

Privacy and browser support

Audio files are processed on your device. Decoding support depends on browser codecs, and long recordings require more memory than their compressed file size suggests.

Common questions

When should I use Audio Studio?
Use the studio for several edits before exporting once. A focused tool is useful for one operation such as trimming or changing volume.
Why will a recording not open?
Your browser must be able to decode the source format. Try a supported recording format or a smaller file; changing the filename extension does not convert audio.

Tool4U.net — free tools, built for privacy. Nothing is stored — files are deleted right after processing.

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