GrabNConvertOpen-source licences
GrabNConvert does its work with a few well-known open-source programs. They ship inside the app, built from their own source without changes, and the app runs them as separate programs. Each one is licensed to you by its authors under its own licence. This page lists them with the exact version we ship and where its source code is. The full licence texts and every smaller component are in the third-party notices.
Media engines inside the app
| Program | Licence | Source |
|---|---|---|
| FFmpeg and FFprobe 9.0.2, macOS (Apple Silicon and Intel) |
GNU GPL v3 | Build by Martin Riedl: ffmpeg.martin-riedl.de FFmpeg source: github.com/FFmpeg/FFmpeg, tag n9.0.2 Also at git.ffmpeg.org/ffmpeg.git and ffmpeg.org/releases |
| FFmpeg and FFprobe n8.1.3-24-g92611900bb, Windows |
GNU GPL v3 | Build scripts by BtbN: github.com/BtbN/FFmpeg-Builds FFmpeg source of this build: commit 92611900bb Also at git.ffmpeg.org/ffmpeg.git |
| aria2 1.37.0, the fast multi-connection downloader |
GNU GPL v2 or later | github.com/aria2/aria2, tag release-1.37.0 Our macOS build of it: engines-aria2-1.37.0 |
| yt-dlp 2026.08.19, reads links and fetches media |
Unlicense (public domain) | github.com/yt-dlp/yt-dlp, tag 2026.08.19 Its bundled Python and libraries keep their own licences, listed in the third-party notices. |
| Deno 2.9.7, the JavaScript runtime yt-dlp uses for some sites |
MIT | github.com/denoland/deno, tag v2.9.7 |
| whisper.cpp 0c7be69, speech to text for Subtitles |
MIT | github.com/ggml-org/whisper.cpp, commit 0c7be69 Our builds of it: engines-whisper-0c7be69 |
Source code for the GPL programs
FFmpeg and aria2 are separate programs shipped with GrabNConvert under their own licences, the GNU General Public License. GrabNConvert runs them; it does not change them, and its own code is not part of them. Their complete source code is at the links above, and we will send it to you on request: email support@grabnconvert.com with the GrabNConvert version you have. This offer stands for at least three years after we last ship that version.
Downloaded when you first use a tool
Some tools fetch their model the first time you use them, so the installer stays small. These are not part of the installer:
- Whisper speech models base, small and large-v3-turbo (OpenAI), MIT: github.com/openai/whisper
- Demucs v4 stem separation models (Meta), MIT: github.com/facebookresearch/demucs
- BiRefNet lite background removal model, MIT: github.com/ZhengPeng7/BiRefNet
- M2M100-418M translation model (Meta AI), MIT: huggingface.co/facebook/m2m100_418M
- ONNX Runtime 1.31.0 (Microsoft), MIT: github.com/microsoft/onnxruntime
- PDFium (Google), BSD-3-Clause and Apache-2.0: pdfium.googlesource.com/pdfium
Full texts
The third-party notices hold the full licence texts, including the GNU GPL, and every font, Rust crate and JavaScript package the app is made with. GrabNConvert itself is covered by the End User Licence Agreement.