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KioTools
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  • Runs locally

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What is this tool?

A browser-based audio cleanup tool. It runs your recording through a chain of filters (high-pass, low-pass, dynamics compression and noise gating) that you can tune with four intensity controls, and lets you compare the original and processed audio side by side.

When to use it

  • Cleaning up a voice memo recorded in a bathroom, hallway or other echoey space
  • Reducing background hiss or hum from a phone recording
  • Making a lecture or meeting recording easier to understand
  • Improving a voiceover recorded without proper acoustic treatment
  • Preparing a rough recording before further editing elsewhere

How to use it

  1. 1Upload an audio recording
  2. 2Adjust the intensity, low-damping, high-damping and noise-floor controls
  3. 3Play the original and processed audio to compare
  4. 4Fine-tune the controls until the result sounds clean
  5. 5Download the processed audio

Frequently asked questions

Can this remove echo completely?

It reduces echo and background noise noticeably but works with filtering, not AI source separation, so very heavy echo may not disappear entirely.

Will it change my voice?

The filters are tuned for speech clarity; pushing the intensity very high can affect tone, so start conservative and adjust to taste.

What audio formats are supported?

Any format your browser can decode, such as MP3, WAV, M4A and OGG.

Is my recording uploaded anywhere?

No — all filtering happens locally in your browser.