About Flint
Where Flint came from, what it is built with, and how it's licensed.
The project
Flint is a Windows-native application: it is written for
Windows 10/11 64-bit, uses direct Win32 disk I/O, and runs as a single
portable flint.exe with no installer. It is not a cross-platform
tool — this is the Windows bootable USB writer named Flint.
Flint started with a simple frustration: writing ISO images to USB drives on Windows should be as careful as it is easy. Most tools either flash without telling you whether the write worked, or hide the destructive reality behind a shiny button. Flint is built the other way around — flash, then prove the bytes landed; wipe, then prove the data is gone; and never start a destructive operation that wasn't deliberately, typed, confirmed.
The project is developed in the open on GitHub, where you can read the source, report issues and contribute.
Technology
- Python with Qt (PyQt6) for a native-feeling Windows GUI.
- Direct Win32 disk I/O for physical-disk writes and read-back verification.
- Packaged as a single portable executable with PyInstaller.
- Windows 10/11, 64-bit only. Current version: v1.0.4.
Privacy & where data lives
Flint collects nothing. No telemetry, no analytics, no accounts, no phone home — the only network activity is an optional weekly update check against the GitHub release feed. Your data is stored locally under your Windows user profile:
| Settings | %APPDATA%\Flint\settings.json |
|---|---|
| Flash history | %APPDATA%\Flint\history.json |
| Startup log | %TEMP%\flint-startup.log (rotated ×3) |
| Crash log | %LOCALAPPDATA%\Flint\crash.log |
License
Flint is free and open-source software, released under the MIT License. You are free to use, modify and redistribute it, subject to the terms of the license. Copyright © 2026 Gowtham G.K.
MIT License 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.
The full license text lives in the repository.
Supporting the project
The most useful things you can do: report bugs with an exported diagnostics file, star the repository, and spread the word to anyone who images drives for a living. Code contributions are welcome — check the repository for contribution guidance.