About Universal Converter
Universal Converter is a free-to-use app for converting images, documents, videos and audio, building PDFs and pulling tables into Excel, all on your own device.
Why it works offline
The files people convert are often private: bank statements, contracts, ID scans, family videos. Universal Converter does all the work on your own device, so your files are never uploaded anywhere. There is no account, no advertising and no tracking in the app.
Who makes it
Universal Converter is designed and developed by Christos Tzouvaras, an independent developer. It is free to use and closed-source. Updates are digitally signed, so the app only installs versions that really come from the developer.
Where it runs
Windows 10 and 11 (also from the Microsoft Store), Mac with Apple silicon and Android 10 or newer, in English, Greek, Spanish, Italian, German, French, Portuguese, Polish, Russian, Arabic, Hebrew, Simplified Chinese, Japanese, Korean, Tamil, Afrikaans, Yoruba and Hausa.
Help and contact
The guide explains each tool step by step. For questions, problems and ideas, open an issue on GitHub; the privacy page explains exactly when the app goes online.
Supporting the project
Universal Converter stays free. If it saves you time, a voluntary contribution supports its further development and running costs.
Guide Questions or problems ✉ universal.converter@outlook.com Privacy Support
How to install and update
- Open the downloaded .dmg and drag Universal Converter into Applications.
- Open the app. The first time, macOS blocks it because it isn't signed by Apple: click Done.
- Open System Settings > Privacy & Security, scroll down, click Open Anyway and enter your password. You only do this once.
Updates: if you allow it when the app first opens, it checks for new versions each time it starts, verifies their digital signature and installs them when you choose.
How to install and update
- Tap Download for Android on your phone.
- Open the downloaded file. If Android asks, allow your browser or file manager to install apps.
- Tap Install.
Updates: the app checks about once a day and tells you when a new version is ready. Download it the same way and install it over the old one; your settings are kept.