A tool you don't have to take on faith.
In March 2025 the FBI warned people away from online file converters; many of them were malware. Do you want your confidential files uploaded to somebody else's server? We did not, so we built the open-source tool we wanted to use.
No file escapes your computer.
Every conversion runs locally; no file is ever sent to a server. Optional AI models can be downloaded to unlock the advanced tools.
Clura srls.
A small company in Italy, built by Fabrizio Blasio, an aerospace engineering student, with the goal of making privacy-focused software that solves everyday problems. Company details on the imprint; anything else, contact.
Apache-2.0, in plain words.
- Use it commercially. Sell things made with it.
- Modify it, fork it, ship your fork.
- Patents are granted with the code.
- No warranty; the licence text is the contract.
The binary is free forever with no feature gates. Revenue comes from what organisations need around running it: SLAs, attested builds, fleet policy. Nothing needed to convert a file is paid, and the engine is never relicensed. If you are an enterprise looking to integrate it, talk to us. Full text →
Built on their work.
| Engine | Domain | Licence | Link mode |
|---|---|---|---|
| FFmpeg / libav* | audio · video | LGPL-2.1+ | dynamically linked |
| libvips | images | LGPL-2.1+ | dynamically linked |
| LibreOffice (headless) | documents | MPL-2.0 | separate process |
| Pandoc | markup | GPL-2+ | separate process |
| Calibre ebook-convert | ebooks | GPL-3 | separate process |
| pdfium | BSD-3 | dynamically linked | |
| lcms2 | colour | MIT | dynamically linked |
| image-rs · Symphonia | pure-Rust paths | Apache-2.0 / MPL-2.0 | in-process |
| ONNX Runtime | inference | MIT | dynamically linked |
Models carry their own registry with hashes and commercial-use status: the table →