Write ISO and DD disk images to USB drives on Windows. Then prove it worked.
Flint is a lightweight Windows-native USB writer that flashes ISO and DD images to bootable USB drives, re-reads the drive afterwards to confirm every byte, and wipes drives with verified, standards-based erasure. Portable, no installation needed. Built for IT admins imaging fleets, Linux users making bootable USB sticks, and anyone done with unbootable drives.
What's new in the latest release →
v1.0.4 · windows 10/11 64-bit · SHA-256 verified build
Up and running in three steps
Pick your image
Drag and drop an ISO or DD file, or browse for it. Flint computes its SHA-256 hash for later comparison.
Pick your drive
Choose from detected USB drives — model, size and serial are shown. Type the confirmation to arm the write.
Flash and verify
Flint writes the image, then re-reads the drive and compares hashes. A flash report is saved to history.
Everything you need to image drives
Flint covers the full workflow: flash, verify, wipe, backup, clone — with headless CLI support for IT imaging at scale.
Drag & drop flashing
Drop an ISO or DD image straight into the window. Flint computes its SHA-256 hash up front and uses it to verify the drive afterwards.
Verified drive wipes
Zero fill, single random pass (NIST 800-88) or DoD 5220.22-M three passes. Every wipe ends with a read-back pass confirming the final pattern.
Post-write verification
Flint re-reads the drive after flashing and compares SHA-256 hashes, reporting exact mismatch offsets if anything differs.
Bad-block scan
A post-flash scan retries unreadable sectors and reports their exact locations instead of failing silently.
Persistence & Windows To Go
Create Linux live USB drives with persistent storage, or Windows To Go drives for running Windows from USB.
Backup & clone
Back a drive up to an image file, or clone one drive onto another — handy before re-imaging a fleet.
Flashing erases drives. We treat it that way.
Designed around consequences, not convenience
Flint writes raw images directly to the physical disk, so mistakes are permanent. The whole app is built around that reality:
- Typed confirmation required before any destructive action — no accidental double-clicks.
- Every write is verified by reading the drive back after flashing.
- Every wipe is verified with a read-back pass confirming the final pattern.
- Drive detection shows model, size and serial so you know exactly what you're writing to.
- Flash history keeps a record of every operation you've performed.
One file. No install.
Grab the latest flint.exe from GitHub Releases — a single portable
executable for Windows 10/11 64-bit. No installer, no dependencies, no telemetry.