Open source licences

The noise removal runs in your browser, which means we send you the engine itself. Here is what it is made of, and the notices its licences require us to pass along.

DeepFilterNet

The noise removal is DeepFilterNet 3. We compile its libDF library to WebAssembly ourselves and load its published model weights at runtime.

• Source: github.com/Rikorose/DeepFilterNet
• Pinned revision: d375b2d8309e0935d165700c91da9de862a99c31
• Licence: MIT or Apache-2.0, at your option — MIT · Apache-2.0

The model weights come from the models/ directory of that same repository and are covered by the same notice. We did not train them, and we have not modified them.

The MIT License (MIT)

Copyright (c) 2026 QuietTake
Copyright (c) 2021 Hendrik Schröter

Permission is hereby granted, free of charge, to any person obtaining a copy of
this software and associated documentation files (the "Software"), to deal in
the Software without restriction, including without limitation the rights to
use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
the Software, and to permit persons to whom the Software is furnished to do so,
subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

Fonts

This site serves its own fonts rather than loading them from a font CDN. All three are licensed under the SIL Open Font License, Version 1.1.

• Archivo — Copyright 2020 The Archivo Project Authors (github.com/Omnibus-Type/Archivo). OFL-1.1 text
• Inter — Copyright 2016 The Inter Project Authors (github.com/rsms/inter). OFL-1.1 text
• JetBrains Mono — Copyright 2020 The JetBrains Mono Project Authors (github.com/JetBrains/JetBrainsMono). OFL-1.1 text

Sample audio

The before-and-after sample on the home page is a real recording from Wikimedia Commons, not something staged for a demo. It is shared under a copyleft licence, which obliges us to credit it and to pass the same licence on to anything we make from it.

• A participant on the street of Lagos talks about Wikipedia by Dfertileplain (Wikimedia Commons).
• Licence: CC BY-SA 4.0
• Our cleaned version is a derivative work and is published under the same CC BY-SA 4.0 licence.

We trimmed it to 30 seconds and ran it through this site's own engine on the balanced preset. We did not loudness-match the two tracks: the cleaned one measures about 2 LU quieter, because removing noise removes energy, and that is what your own file will do too.

This site

Built with Astro. The site code is ours; the parts above are not, and that is the point of this page.